Re: can one "dd" XO-1.5 internal microSD cards, to another XO-1.5?
> Better would be to use SD cards. The original goal was to copy microSD cards. Would it be reasonable to copy microSD to SD, move the SD card to the target XO, and then copy SD to microSD? I expect an OpenFirmware wizard could do it with no effort but I'm not that level of wizard. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Dark or darker display
qu...@laptop.org said: > The XO-4 display has a much brighter backlight. It proved impossible to > find such dark LEDs as used to exist. Do they take more power or are they more efficient? -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
/etc/hosts busy??
When I tried to update /etc/hosts, it says busy. I thought I'd been doing this for years, so I'm a bit surprised and/or confused. bash-4.2# mv hosts /etc/hosts mv: inter-device move failed: 'hosts' to '/etc/hosts'; unable to remove target: Device or resource busy bash-4.2# rm /etc/hosts rm: cannot remove '/etc/hosts': Device or resource busy bash-4.2# mv /etc/hosts /etc/hostsx mv: cannot move '/etc/hosts' to '/etc/hostsx': Device or resource busy bash-4.2# It used to work. I did it sometime after early June. bash-4.2# ls -l /etc/hosts -rw-r--r-- 1 root root 1504 Jun 4 22:07 /etc/hosts bash-4.2# My usual approach for things like this is to find the program that has the file open, but I can't find it with lsof. ?? bash-4.2# lsof | wc lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs Output information may be incomplete. 4658 44081 503329 bash-4.2# lsof | grep hosts lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs Output information may be incomplete. bash-4.2# Does anybody know if something is hiding in that error message and/or how to find out what's going on? cp -p worked, but I'm still curious. I'm pretty sure I used mv last time, but maybe it's been busy for ages. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
SD on XO-1
georgejh...@gmail.com said: > With so many XO1's out there, it might really be helpful, and strategic, to > be able to have more that 1 GB storage. > I guess we might not know for a while how many XO1's are unreliable, when > running off of an SD card, until we try it. I have an XO-1 that was setup to reboot every 4 hours. and mount an SD card. It didn't get a lot of use, but it did test the reboot process and make sure the WiFi worked. The only problems I ever saw was that it would occasionally hang during boot because Linux couldn't talk to the SD card. It was printing out a timeout message every second or two. There was a short pause between messages. I assumed it was a quirk in the firmware setup. I'll try to collect some data if somebody wants to chase this. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
BattleMesh v7 talk and workshop, 12 - 18 May 2014 in Leipzig, Germany
Speaking of mesh... From the bufferbloat list. (with lots of trimming) -- The battlemesh routing interop and test event this year should be bigger and better than ever, with a larger number of groups participating than ever before: http://static.nemesisdesign.net/battlemesh/poster-0.4.png Deadline for proposals/papers/talks is May 1, and the event itself is in Leipzig, De, May 12-18. [1] http://battlemesh.org/BattleMeshV7/Participants > What is Battlemesh? > --- > > The Wireless Battle of the Mesh is an event that aims at bringing together people from across Europe and beyond to test the performance of different routing protocols for ad-hoc networks, like Babel, B.A.T.M.A.N., BMX, OLSR, 802.11s and Static Routing. > > It is a tournament with a social character. If you are a mesh networking enthusiast, community networking activist, or have an interest in mesh networks you might want to check this out ! > > The goal of the WirelessBattleMesh events is to set-up hands-on testbed for each available mesh routing protocol with a standard test procedure for the different mesh networks. During the different WBM events, similar hardware and software configuration will be used based on the OpenWRT BoardSupportPackage and packages for each protocol implementation. The WBM events are also a great opportunity to develop testing tools for PHY/MAC radio layers (drivers, scripts and PHY analyzers) . -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
KQED: In Oakland, Mixed Results for Tech In Schools
There is no mention of OLPC or Sugar, but I think it's good background info as well as a good news story. http://www.californiareport.org/archive/R201311011630/b The audio is 6 minutes. For those of you not familiar with Oakland, they have lots of troubles, close to Detroit, and the schools have their share of the problems. They talked to two schools. One thumbs up. One thumbs down due to WiFi overload. (That wasn't the only problem, but it was fatal.) The link at the bottom to more/full-story is good too. It looks like a transcript, but it's not accurate. The first half is close but the second half diverges a lot. There are lots of links. Time sink warning if you follow a good one. The Mind/Shift blog has lots of good stuff. "Blended learning" seems to be a buzzword. Anybody know anything about the Christensen Institute for Disruptive Innovation? http://www.christenseninstitute.org/honoring-clayton-christensen-with-new-name -emboldened-mission/ He teaches at Harvard Business School. His book, The Innovator's Dilemma, is famous in the high-tech world. (It's very good. I haven't read any of his other books.) https://en.wikipedia.org/wiki/Clayton_Christensen -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.2 query
qu...@laptop.org said: > Hmm, there should be, though it might be the word "English" in another > language. There are 3 choices on the pull-down list. They look like the same 3 I had before. The format is things like: Kreyol (Haiti) but the stuff inside () is useless (to me) for Dari and Pashto. There is no circle-minus box available. It doesn't even tell me what the current language is. Anybody know where that selection is stored so I can edit it with a text editor? -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.2 query
cjlhomeaddr...@gmail.com said: > Can anyone change languages with the Sugar Control panel on an XO (xo-1 or > xo-4) and 13,2 build 13? On an XO-1 running 13.2.0 My Settings => Language gives me a page with a drop-down menu with a circle-+ button next to it. That menu starts out empty, and the drop-down stuff gives me 3 choices: Dari (Afganistan) Kreyol (Haiti) Pashto (Afganistan) Clicking one, then the + adds another pulldown and + and - check boxes. Clicking the master OK and Restart switches me to a language I can't read. I don't see any way to switch back to English. The text on the Language page is still in English, but there is no English choice in the drop-down. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: XO-1(.75)
qu...@laptop.org said: > A better measurement to look for is the elapsed time of activity startup. > This is a most interesting value, but it is difficult to obtain without > changing the activity source so that the point of startup completion is > identified. (That task is made more difficult since some activities > schedule some of their startup _after_ their main startup.) Would it be worth adding a small chunk of code to Sugar to help this area? I'm thinking of an API to say "OK, I'm really started now." so Sugar can log a line of data on how long it took to get started. There should probably be an environment variable to or similar enable that performance logging. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Re-install os885 on XO-1.5 error
> * try a different USB drive, I wore out a USB drive, just by downloading new versions of XO-1.0 software to try. (Kingston, 2GB) copy-nand complained. I forget the exact error message, but it was obvious after I compared the bits on the USB drive against the bits on the disk. Many thanks for the CRC checking part of copy-nand. I still have the busted USB drive if anybody wants one that is just-flakey-enough for testing. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Re (2): XO-1.5 build 885 no space in journal
peasth...@shaw.ca said: > Some very economical offerings of flash storage are available on eBay, with > delivery to your mailbox. If you find a promising choice, buy a minimal > order and test. If it works buy more. If it doesn't work, the loss is > small. Anybody interested in SD cards or Flash storage should read: On MicroSD Problems http://www.bunniestudios.com/blog/?p=918 I reread it every year or two when something like this comes up to remind me. Round up your opportunities for troubles (maybe a lot) if you are purchasing over eBay. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: School networks and electrical equipment damage
d...@laptop.org said: > I have seen that some UPSs (unfortunately not these ones) allow a phone line > to be passed through them, supposedly offering some protection. Would such a > system protect against a lightening bolt, assuming thats what happened here? Surge suppressor is the buzzword you are looking for. They will help, but nothing will stop a lightning strike that is near enough. The only question is how-near. The wiki page looks good: http://en.wikipedia.org/wiki/Surge_suppressor Note the discussion about MOVs getting used up. Some outlet strips include a pair of phone jacks and/or cable TV connectors. That's the quick, simple, and low cost approach. You can also get industrial type units at higher prices. Google has lots of hits. I'm far from a wizard in this area. How many schools are you talking about? If it's more than 2 or 3, it might be worth a phone call to one of the non-cheap places to see if they have suggestions. (Or see if they have some documentation on the web.) -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.2.0 development build 5 released
rich...@laptop.org said: > Boot with the check key held so you turn off pretty boot and see where its > hanging at. It works most of the time. It's only occasionally that it hangs. Is there something I can edit that will turn off pretty boot? -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.2.0 development build 5 released
I've got an XO-1 setup to reboot every 4 hours. It's stuck with the XO in the middle of the circle of dots. The dots are moving, so it's not totally dead. Ctrl-Alt-F2 doesn't work. Is there anything I can do to collect some useful info? Has this problem been seen recently? Should I take it apart and connect up the debugging serial port? ... -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.2.0 development build 2 released
>> On my XO-1, keys F1, F2, F3, and F4 don't do anything. The bright/dim keys >> ((F9, F10?) do work. ma...@laptop.org said: > This just happened to me in os3, with XO-1.75 . Filled as > https://dev.laptop.org/ticket/12652 There was also a problem with switching to Gnome not working (on XO-1) Both have been fixed (for me, XO-1) on build 3. https://dev.laptop.org/ticket/12639 -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.2.0 development build 2 released
Would somebody with an XO-1 please try switching to Gnome. Mine went into a loop trying to start X. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Testing] 13.2.0 development build 2 released
> Mikus, I know you probably are testing on XO-1. Hal what generation of XO > are you using? XO-1 -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.2.0 development build 2 released
On my XO-1, keys F1, F2, F3, and F4 don't do anything. The bright/dim keys ((F9, F10?) do work. Is this just me, or can somebody confirm it? Ctrl-Alt-F1/F2 work as expected. Trying to open Browse hangs with a blinking globe. Occasionally the WiFi LED blinks.. Is there any way to get to someplace where I can feed it my WiFi password? -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Boot cycle systemd service
mar...@laptop.org said: > adding "sleep 10; reboot" at the end of local.rc doesn't work anymore in > this brave new systemd world. You need to do something like: systemctl enable rc-local.service (only once) That's also the (new) way to turn on sshd. systemctl enable sshd.service -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.1.0 development build 12 released
w...@laptop.org said: > More importantly, occasionally boot with two sources of power (battery and > DC). Q7B01 should have been replaced automatically a number of builds ago. What chunk of code does the update? Could it display a reminder for a few seconds if there is new code that hasn't been applied yet? -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.1.0 build 6 released
> Can you see any error in the file /home/olpc/.sugar/default/logs/shell.log? Discard network history doesn't work. So I deleted /etc/NetworkManager/system-connections/$AP-name and rebooted. [I've got olpc.fth patched to show the log info during booting.] While I was watching the boot info, I noticed: [FAILED] Failed to start NetworkManager -- I opened https://dev.laptop.org/ticket/12188 to hold the log files. I couldn't figure out what was going on. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.1.0 build 6 released
> #12133 13.1.0 does not connect to a wireless AP My setup is XO-1 and Linksys WRT54GL AP that needs a password. I can't connect through Sugar. It doesn't ask me for a password. The WiFi LED is off. (It blinks occasionally, and sometimes new APs appear shortly after the blinks.) I can connect through Gnome. After that Sugar can connect automatically on reboot using the saved password. OS 5 did the same thing. OS 4 worked as I expected. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.1.0 devel build 5 released, for the XO-1, XO-1.5, XO-1.75 and XO-4
> Has anyone else had trouble getting to the OK prompt in OFW? When I boot > with the gamekeys down, it seems that OFW is detecting some spurious > keypress and gets stuck in a cycle of error msgs due to the bad command > being typed. Any workarounds? I just tried it on an unlocked XO-1. Lots of Trying xxx messages, but it didn't find anything. It ended with "Boot failed" and "Use power button to power off." It all looked reasonable to me but I don't know what older versions did. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.1.0 devel build 5 released, for the XO-1, XO-1.5, XO-1.75 and XO-4
Were there any changes in the WiFi area for XO-1? OS4 worked for me. Now, I can't connect. Clicking on my AP doesn't ask me for a password. I remember discussions of this area, but I never had any troubles. My neighborhood view shows my AP (and several others) and the 3 Mesh icons. The Mesh icons are not blinking. That's what I expect. But the WiFi LED isn't on. It blinks occasionally. Sometimes, new APs appear after the blinks. I switched to Gnome and could connect there. Now it works after switching back to Sugar. Is there anything I can do to help debug this? -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.1.0 development build 3 released
>>> -connect to AP: I cannot connect, when you click, appears the "star" but no >>> give me the "password" window (it's a secured wifi) >> Ticket appreciated on SL trac. > Tony adds it to SL#3939 My XO-1 can connect to my AP (password required) without problems. There must be something interesting that splits the works from the no-password cases. I just tried mine again. It was connected. I disconnected, then tried to reconnect. It didn't connect or ask me for a password. It was still busy trying to connect to all 3 Mesh Networks. Is that the problem in this case? I just did a "Discard Network History", then waited for it to finish trying the Mesh Networks, then tried a connect. It asked for a password. In case it matters, I'm using a WRT54GL. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 13.1.0 development build 2 released
d...@laptop.org said: > Bug/testing reports accepted and appreciated - either on the appropriate > trac, or on this list. On a XO-1, there are several/many examples in My Settings Network: There is no text next to the check-box. Power, Software Update The header is there, but the page/contents aren't. Switch Desktop: The display stuff crashes and restarts Sugar. Modem, Language: You can't exit. The X and check-mark are too far to the right. In Modem, you can just see (and click) the edge of something. I have to reboot to get out of Language -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Sugar-devel] Problem downloading a lease.sig file on an XO
>> If your XO images have the GNOME desktop in them, using >> the web browser included for GNOME (Firefox or Epiphany) >> to download the file to USB should not alter the file name. >> Just make sure the kids know how to "eject" the USB stick >> when they are done. > This is probably what I'm going to do. The idea was to have kids use Browse > in Sugar but telling them to "go to Gnome" as an extra step seems easy > enough for a simple unlocking guide. Would wget be simpler overall? It could be embedded in a script that does everything. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Firmware issu
kgordon...@gmail.com said: > The lid message happens every time to me when I reboot from Linux and > immediately enter firmware on any XO1 ... Ah, thanks... I didn't catch the whole recipe. It's Linux, reboot, ESC to OFW that shows the problem. I just got it first try. I'm normally doing lots of Linux reboot to Linux (without going to the OFW prompt). -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Firmware issu
qu...@laptop.org said: > The problem of the unexpected lid closed power down in Open Firmware after a > warm restart from Linux, will be fixed in the next release. > The warm restart was not clearing an input inverter on the path from the lid > sensor to the processor. A cold restart, using the power button or the bye > command, was not affected. I'm missing something. If that's the whole story, why doesn't this problem show up on every reboot from Linux? I do that every 4 hours with only occasional problems. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Setting the time
> In a school deployment, it is desirable that all of the XOs have the same > time. This time should be synchronized with/by the school server (even if > the school server is wrong). It is not reasonable to base this capability > on access to the internet. How closely do you need them to be synchronized? 1 second? 1 microsecond? 1 minute? It should be reasonably easy to setup ntpd on the school server and get the XOs to set their clocks when booted. You may want/need a cron job to set the time occasionally. > Casio sells 'atomic' watches that synchronize to Ft. Collins by radio. > Neat, but how does this work in Rwanda? WWVB runs at 60 KHz. There are several similar systems in other countries. I don't think any of them make it to Africa. GPS does. You can get USB GPS receivers for under $50. The SiRF chip is the most popular in the low cost units. It's crappy if you need ms level timing, but good enough if all you need is 1 second. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Impossible to set date in 11.3.0?
qu...@laptop.org said: > "date" followed by a successful normal shutdown should work, because a > normal shutdown runs hwclock ... but "hwclock --systohc" is handy in case > you aren't sure that a normal shutdown will happen next. It used to do that on shutdown as part of /etc/rc.d/init.d/halt and friends, but I think it got dropped as part of the switch to systemd. >grep hwclock /etc -r< doesn't find anything. Does anybody know if it moved to someplace I haven't looked yet and/or if it was deliberately dropped or just fell through the cracks? -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Firmware issu
kgordon...@gmail.com said: > I've noticed that on multiple XO 1's with Build 20, 12.1.0 and FW Q2F13 that > entering reboot from terminal then tapping on the x key to get into OFW > brings up a spurious "Lid switch is active - powering off in 8 seconds" > after the OK prompt appears. The lid is indeed fully open, after all, I am > hitting the 'x' key, so I'm not sure how the machine thinks it's closed :-) > "Type lid-off to disable this " at the OK prevents it from shutting off, > when I ent4er it in time, but I was wondering if anyone else is experiencing > this symptom. I saw one a while ago. The context for mine was that the battery light was red on what I thought was a good battery. I was trying to get from Linux to the firmware to collect some battery info. In hindsight, it's not too surprising that the system was confused about the lid-sensor since it was known to be confused about the battery. -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Blinking red battery light on XO-1
qu...@laptop.org said: > To avoid it powering off, type lid-off and press enter. Yes, you only have > eight seconds to do this. The printout said that, but I didn't even get started typing before it timed out. I'm not sure where 8 seconds came from. If that happened often enough I'd probably be able to do it fast enough. But that was the first time I had seen it. I wasn't quick enough to read and understand and type. Remember, I was trying to not destroy the evidence so I was going slowly. - Something similar happened a few months ago which is why I saved Richard's message. I have a hack script that reboots the XO every 4 hours. It's got a patch to check /sys/class/power_supply/olpc-battery/error and log the answer instead of rebooting. The error was 20 (Sorry I didn't remember to look there earlier.) -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Blinking red battery light on XO-1
rich...@laptop.org said: > Blinking Red is error. Next time it happens can you please boot to OFW and > do > ok watch-battery > Then press a key to make watch-battery exit. When it exits it will tell you > what the error is. Please pass that on. I just got one. When I got to OFW, it told me the lid switch was active and gave me 8 seconds before it powered off. On power up again, it was fine and the battery light was green. I wasn't smart/fast enough to notice when the battery light stopped blinking. Is there anything I can do while still running Linux? -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Booting XO-1 with SD card occasionally hangs on I/O timeouts
mi...@bga.com said: > I can NEVER recall any incident where I could attribute "failure to boot" > to the SD card. [Note that if an XO fails to boot, I normally don't get to > see the /var/log/messages from that boot attempt.] My experience with > "failures to boot (after getting past OFW)" is that they occur 10 out of 10 > times (not 1 out of 100). I think I've seen this once or twice before. The errors are timeouts rather than data corruption. I've been assuming it was some sort of problem in the handoff between OFW and the kernel and/or kernel initialization. (That's just descriptive. I don't have any data to back it up.) "hangs during booting" may be misleading. I've got a copy of /var/log/messages after that event. I don't see any typical booting stuff. It all got kicked out of the dmesg buffer by timeout messages. The first useful message is: May 8 09:32:10 xo-0d-57-33 kernel: [11215.335626] ip_tables: (C) 2000-2006 Netfilter Core Team Then it goes off into NetworkManager. The reason I noticed the problem is because the WiFi LED wasn't on. The screen was dark, but poking the backlight-on key worked. > My suggestion would be to try "repairing" (fsck?) the SD card. It all works fine after I unplug and replug the SD card. I've seen no hints that there is anything wrong on the card. grep asdfasdfsadf . -r ran in a reasonable amount of time and didn't leave any complaints on screen or in /var/log/messages -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Booting XO-1 with SD card occasionally hangs on I/O timeouts
Is this an interesting problem? If so, what should I do to get more info? It only happens occasionally, say 1 out of 100 times. It recovers if I unplug the SD card. The card is a Kingston, 8 GB. /var/log/messages has lots of things like this: May 8 09:32:09 xo-0d-57-33 kernel: [ 6209.920040] mmc0: Timeout waiting for hardware interrupt. May 8 09:32:09 xo-0d-57-33 kernel: [ 6209.959277] mmcblk0: error -110 transferring d ata, sector 5, nr 3, cmd response 0x900, card status 0x0 May 8 09:32:09 xo-0d-57-33 kernel: [ 6210.036110] end_request: I/O error, dev mmcblk 0, sector 5 May 8 09:32:09 xo-0d-57-33 kernel: [ 6220.080041] mmc0: Timeout waiting for hardware interrupt. May 8 09:32:09 xo-0d-57-33 kernel: [ 6220.119241] mmcblk0: error -110 transferring d ata, sector 6, nr 2, cmd response 0x900, card status 0x0 May 8 09:32:09 xo-0d-57-33 kernel: [ 6220.195925] end_request: I/O error, dev mmcblk 0, sector 6 May 8 09:32:09 xo-0d-57-33 kernel: [ 6230.240040] mmc0: Timeout waiting for hardware interrupt. May 8 09:32:09 xo-0d-57-33 kernel: [ 6230.279282] mmcblk0: error -110 transferring d ata, sector 7, nr 1, cmd response 0x900, card status 0x0 May 8 09:32:09 xo-0d-57-33 kernel: [ 6230.355971] end_request: I/O error, dev mmcblk 0, sector 7 -- These are my opinions. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Announcing Q2F10 for XO-1
w...@laptop.org said: > Just for clarification, do you mean full-speed (11 Mb/s) devices (USB 1.0) > or low-speed (1 Mb/s) devices (USB 1.1) aren't supported by dir u: ? ok p2 Found USB 1.1 disk! USB2 devices: /pci/usb@f,5/wlan@0,0 USB1 devices: /pci/usb@f,4/scsi@1,0 /pci/usb@f,4/scsi@1,0/disk -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Announcing Q2F10 for XO-1
> ok dir u: says "Can't open directory" > In case it matters, this USB drive is old, old, old... 16 MB. :) I took the discussion with James Cameron off-list to reduce clutter. For the archives and/or in case anybody is curious. The problem turned out to be that dir u: doesn't support USB 1.1 drives. (Remember, I said it was old.) -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Announcing Q2F10 for XO-1
qu...@laptop.org said: >> It does work if I use "disk:" rather than "u:". > Interesting. What firmware version do you have installed at the moment? I'm not sure what I had since I have "fixed" that by updating it to q2f10.rom . Most likely it was the previously announced version. Running q2f10.rom with that USB Flash drive plugged in... ok dir u: says "Can't open directory" ok dir disk: says fat-file-system (and files/dirs I that seem reasonable, including q2f10.rom that I loaded.) In case it matters, this USB drive is old, old, old... 16 MB. :) -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Announcing Q2F10 for XO-1
> http://wiki.laptop.org/go/OLPC_Firmware_q2f10 That says: >* if the downloaded file is on a USB drive, type: > ok flash u:\q2f10.rom But that didn't work for me. It does work if I use "disk:" rather than "u:". Is that wiki page simply out of date? If so, what changed...? Or is something more complicated going on? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 12.1.0 devel build 7 released, for the XO-1, XO-1.5 and XO-1.75
p...@laptop.org said: > to be clear -- is it really suspending, or is it just that the screen is > dimming and blanking? the latter is expected. the former may or not > represent crack slippage. My Settings -> Power has Automatic Power Management checked. After a while, it suspends. Restore leaves the WiFi off. There is a lot of stuff in /var/log/messages Somebody who knows what is going on should probably take a look at it. I assume that sort of person has an XO-1 handy and can generate their own test case easily and then know exactly what happened. I'll collect some samples (and/or whatever else) if that will help. Here are a few samples: Apr 14 17:51:44 xo-0d-57-33 NetworkManager[427]: wifi_utils_get_mesh_channel: assertion `data->get_mesh_channel != NULL' failed Apr 14 17:51:46 xo-0d-57-33 NetworkManager[427]: wifi_utils_get_mesh_channel: assertion `data->get_mesh_channel != NULL' failed Apr 14 17:51:46 xo-0d-57-33 NetworkManager[427]: wifi_utils_get_mesh_channel: assertion `data->get_mesh_channel != NULL' failed Apr 14 17:51:46 xo-0d-57-33 NetworkManager[427]: wifi_utils_get_mesh_channel: assertion `data->get_mesh_channel != NULL' failed Apr 14 17:52:53 xo-0d-57-33 kernel: [ 76.650051] usb8xxx 1-1:1.0: eth0: command 0x0043 timed out Apr 14 17:52:53 xo-0d-57-33 kernel: [ 76.650109] usb8xxx 1-1:1.0: eth0: Timeout submitting command 0x0043 Apr 14 17:52:53 xo-0d-57-33 kernel: [ 76.650135] Resetting OLPC wireless via EC... Apr 14 17:52:53 xo-0d-57-33 kernel: [ 76.657599] usb8xxx 1-1:1.0: eth0: PREP_CMD: command 0x0043 failed: -110 Apr 14 17:52:53 xo-0d-57-33 kernel: [ 76.657648] usb8xxx 1-1:1.0: eth0: HOST_SLEEP_CFG failed -110 I thought I saw a couple of stack traces in a previous example, but I can't find one in this simple case. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 12.1.0 devel build 7 released, for the XO-1, XO-1.5 and XO-1.75
12.1.0 for XO-1 has Automatic power management enabled. I thought we decided to turn that off for XO-1 since it didn't work well enough. Is my memory fuzzy or did disabling this for XO-1 slip through the cracks? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [support-gang] XO brightness key operation
> As I have a tiny understanding of LEDs, I recall something about being able > to detect light with them. If you shine light on a reverse biased diode, it will leak in proportion to the intensity of the light. The mechanism is a photon occasionally kicks loose an electron and the reverse-bias field pushes the electron toward the positive terminal. Enough electrons like that and you have a small current flow. Normally, that's not a problem since diodes and transistors are packaged in opaque plastic. LEDs are packaged in clear plastic to let the light out. But that means you can also also get light in. -- There is an old story about one of the early SUN boxes. It had just booted the OS (or something great like that) when somebody took a picture of it. It crashed. The camera used a flash. The UV ROMs with the software didn't have any stickers over the transparent lids, or maybe there was no lid over the CPU chip. The light from the flash was enough to screw things up. (If anybody has a good URL for that story, please let me know. I didn't find it with a bit of searching.) -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 12.1.0 devel build 6 released, for the XO-1, XO-1.5 and XO-1.75
> Which means it's not finding the SD card slot. There is nothing in /var/log/messages when I connect and disconnect the SD card on my XO-1. Is there something else I should try to collect more data? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 11.3.1 development build 32 for XO-1.75, XO-1.5 and XO-1
> Updatable via olpc-update -- try the cmdline below. On a XO-1: It died because it couldn't find /versions/configs/cfg.UnVIOS' Possibly I broke something by running yum update. -- bash-4.2# olpc-update 11.3.1_xo1-32 Downloading contents of build 11.3.1_xo1-32. Updating to version hash d51821a9ddcdf59320b439095916f3b4 Traceback (most recent call last): File "/usr/sbin/olpc-update", line 209, in if __name__ == '__main__': main () File "/usr/sbin/olpc-update", line 75, in main olpc_update(options, args) File "/usr/lib/python2.7/site-packages/bitfrost/update/setup.py", line 100, in new_f return f(*args, **kwds) File "/usr/sbin/olpc-update", line 206, in olpc_update force=options.force, poweroff=options.poweroff) File "/usr/lib/python2.7/site-packages/bitfrost/update/setup.py", line 131, in new_f return f(*args, **kwds) File "/usr/lib/python2.7/site-packages/bitfrost/update/setup.py", line 100, in new_f return f(*args, **kwds) File "/usr/lib/python2.7/site-packages/bitfrost/update/setup.py", line 385, in perform_update trim_config(partitioned, cur_hash) File "/usr/lib/python2.7/site-packages/bitfrost/update/setup.py", line 155, in trim_config swing_config(partitioned, current=cur_hash, alt=None) File "/usr/lib/python2.7/site-packages/bitfrost/update/setup.py", line 164, in swing_config cfgdir = mkdtemp(prefix='cfg.', dir='/versions/configs/') File "/usr/lib/python2.7/tempfile.py", line 318, in mkdtemp _os.mkdir(file, 0700) OSError: [Errno 2] No such file or directory: '/versions/configs/cfg.UnVIOS' bash-4.2# -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 12.1.0 devel build 5 released, for the XO-1, XO-1.5 and XO-1.75
It seems to be mostly working on a XO-1. I've blundered into one strange quirk. If you wait until it blanks the screen, then ssh in and reboot via "shutdown -r now", you get stuck in a mode where the screen in blank. It recovers if you "shutdown -h now" and then push the power-on button. I find things like this in /var/log/messages Mar 25 13:28:01 xo-0d-57-33 olpc-kbdshim-udev[500]: /usr/bin/olpc-brightness: line 29: /sys/devices/platform/dcon/output: No such file or directory Mar 25 13:28:01 xo-0d-57-33 olpc-kbdshim-udev[500]: /usr/bin/olpc-brightness: line 56: /sys/class/backlight/dcon-bl/brightness: No such file or directory Mar 25 13:28:01 xo-0d-57-33 olpc-kbdshim-udev[500]: /usr/bin/olpc-brightness: line 59: /sys/class/backlight/dcon-bl/brightness: No such file or directory Mar 25 13:28:01 xo-0d-57-33 olpc-kbdshim-udev[500]: /usr/bin/olpc-brightness: line 56: /sys/class/backlight/dcon-bl/brightness: No such file or directory Mar 25 13:28:01 xo-0d-57-33 olpc-kbdshim-udev[500]: /usr/bin/olpc-brightness: line 24: /sys/devices/platform/dcon/output: No such file or directory I see /sys/class/backlight/, but it is empty. The power-off button doesn't seem to do anything. --- Starting Browse gets a segfault: Mar 25 14:05:41 xo-0d-57-33 kernel: [ 93.272456] Browse <8addf8e[939]: segfault at 4 ip b766b28c sp bfdec810 error 4 in libpython2.7.so.1.0[b758b000+ 15c000] It's probably a good idea if somebody who knows what's going on takes a look at syslog on a XO-1. I see things like these: Mar 25 14:05:05 xo-0d-57-33 NetworkManager[401]: wifi_utils_get_mesh_channel: assertion `data->get_mesh_channel != NULL' failed Mar 25 14:05:17 xo-0d-57-33 udisksd[925]: Error opening /etc/crypttab file: Failed to open file '/etc/crypttab': No such file or directory (g-file-error-quark, 4) -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 11.3.1 development build 31 for XO-1 and XO-1.5
> Thanks, I've fixed this for XO-1/XO-1.5 now. > In 11.3.1 the build download path changed from e.g.: >http://build.laptop.org/11.3.0/os8/xo-1.5/ > to: >http://build.laptop.org/11.3.1/os31/xo1.5/ > so I've updated the pattern used by the update server to no longer use the > "-" for 11.3.1 builds. olpc-update worked for me on a XO-1. Thanks. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: New boot animation for 12.1.0
> If the indication can track fraction_completed - so much the better - but I > do not expect the user to leave the room if the boot process takes longer > than he expects. Seeing "only 25% to go" is ; the > is knowing "no problems thus far". Watching the number of files in /var/run/*pid and/or similar places might give a good indication of how much progress has been made. (as compared to just "we can update the display so we aren't locked up yet") I don't know how to cleanly translate that into a percent. The total might depend on what is installed and/or what extra I/O gear is plugged in this time. It might be reasonable to collect a list of normal files for this distribution (say in a file) and only count them. That would let you convert to %, but initialization might finish early if a package is not installed or broken such that it crashes. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Multi-laptop naming scheme for build files
qu...@laptop.org said: > The build number meaning has become overloaded. I dislike having it > exposed. You have to expose something that's unique for each build so you can talk about which versions do/don't have a particular bug or feature. I think a sequential number is about as good as you are going to get. It lets you use "before" and "after". -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: what is the root filesystem mounted as??
On a XO-1, c2, running os883, Sugar 0.94.1 [murray@xo-0d-57-33 ~]$ more /etc/mtab /dev/root / ext3 rw,noatime 0 0 proc /proc proc rw 0 0 sysfs /sys sysfs rw 0 0 devpts /dev/pts devpts rw,gid=5,mode=620 0 0 tmpfs /dev/shm tmpfs rw,size=50m 0 0 /tmp /tmp tmpfs rw,size=50m 0 0 vartmp /var/tmp tmpfs rw,size=50m 0 0 varlog /var/log tmpfs rw,size=20m 0 0 none /ofw promfs rw 0 0 none /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0 fusectl /sys/fs/fuse/connections fusectl rw 0 0 gvfs-fuse-daemon /home/olpc/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,user=olpc 0 0 /dev/mmcblk0p1 /media/Kingston vfat rw,nosuid,nodev,uhelper=udisks,uid=500,gid =500,sh ortname=mixed,dmask=0077,utf8=1,showexec,flush 0 0 [murray@xo-0d-57-33 ~]$ [murray@xo-0d-57-33 ~]$ df Filesystem 1K-blocks Used Available Use% Mounted on /dev/root 1048576748948299628 72% / tmpfs 115728 0115728 0% /dev/shm /tmp 5120016 51184 1% /tmp vartmp 51200 8 51192 1% /var/tmp varlog 20480 120 20360 1% /var/log /dev/mmcblk0p1 8001536731840 7269696 10% /media/Kingston [murray@xo-0d-57-33 ~]$ -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: EC corruption by q2f04rc firmware
mi...@bga.com said: > To date I have one 2007-vintage XO-1 with q2f04rd (and os882). It worked > normally (and never lost charge while plugged in to AC) until I closed the > lid (thereby putting it into suspend). Upon opening the lid and pressing > power, the power light changed to red, and the native XO green keyboard no > longer worked. I can reproduce this, or something very similar. I'm using q2f04rc and 883 on a XO-1 c2 For me, the key is to make it happen is removing AC power. Closing and opening the lid works normally if the AC is plugged in. Without AC, I've seen the battery LED go red at least twice, but I can't make it happen now. Ahh... found it. I only get the red LED if the battery is fully charged. What do you call the LED next to the battery LED that indicates that the system is running? That's tangled up in this confusion too. I've seen my system running when that LED is off and seen it turn on when I poke the power-off button and back off when I try to start the system. I'll call it the CPU LED. Starting with a full battery and no AC, the pattern is: battery LED is off, CPU LED is on close lid short delay CPU LED goes out few second delay battery LED goes orange few second delay battery LED goes red pause open lid (I've got it setup to auto start) system goes active, CPU LED stays off, battery LED stays red, keyboard doesn't work -- Where is the nice big picture of the XO with labels for everything? (I thought I had it bookmarked.) How do I find it at times like this? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [BULK] Re: harvesting energy
rich...@laptop.org said: > Speaking from experience measuring the power draw of a single XO with these > low cost power meters is tricky. They can be very inaccurate at lower > power measurements. The kill-a-watt for example has a typical accuracy of > 1% with a max of 4%. Full scale is 1800W which would be 18W minimum > measurement. You can play some games with the gain into the ADC's and > reduce that but its not clear if the kill-a-watt does that. I can't > remember the exact output numbers when I tried a kill-a-watt. Good point. Thanks. It's even worse than that. In the power mode, the Kill-a-Watt only shows whole watts, no fraction. So at roughly 20 watts, it can easily be off by 5%. (Maybe somebody should add that to a UI lessons for kids.) I haven't carefully checked the accuracy of my Kill-a-Watt, but it's passed all my sanity checks. At $20, it's a useful tool. (The technology for this sort of thing must be reasonably solid. My new electric meter has an LCD rather than a spinning wheel and dials.) >> If it takes 2 hours to charge the battery, that's 40 watt hours. > In my talks about power to deployments and groups I have a standard saying > that if the answer to "How much power does it take?" is a simple answer > with no qualifiers then its wrong. ;) Thanks again. The question I was commenting on was roughly: Can a person put out enough power to usefully charge the battery on an XO? In that context, I think anything within a factor of 2 is close enough. > Is the XO running or powered off? Is it for a XO-1 or XO-1.5? Is it DC > measured at the input jack or is it AC? If its AC what power adapter is it > using? The 17W, the 24W or the 25W adapter? What AC voltage and frequency > is the adapter running at? Here is a data point. XO-1, system running, not doing much (no human), backlight off. 17W Adapter. (12V, 1.42A) running on 120V, 60 Hz. The battery says LiFe, 6.5Vdc, 3.1Ah. Kill-a-Watt reads 19-20 watts. It took 2 hours to charge the battery from 10% to 80%. The charge% was quite linear up to 80%. At 80%, it started to round off. After another half hour it got to 90%, then jumped to 100%. I'll make a pretty graph if anybody wants. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 11.3.0 build 8 released, for XO-1.75, XO-1.5 and XO-1
My XO-1 used to blink a LED when it sent/received packets. That doesn't happen any more. Is that a feature or bug? ping is the obvious test case. Nothing blinks for me. There are 2 LEDs in the lower-left: a vertical bar with a ball on top and a set of parens around a center dot. This picture: http://en.wikipedia.org/wiki/File:XO-1-4th_gen-features.jpg calls them Storage Access and WiFi Access. My Storage is on solid. The WiFi is off solid. I just saw the "Storage" LED blink. The pattern was what I expect when it scans the other channels for access points. If I disconnect, the Storage LED goes out. It goes back on when I reconnect. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [PATCH] Add libertas_disablemesh module parameter to disable mesh interface
How does this compare with adding something like: echo 0 > /sys/class/net/eth0/lbs_mesh to /etc/rc.local ? Does NetworkManager get segflts with your approach? https://dev.laptop.org/ticket/10648 -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: XO-1: Lid close/open
qu...@laptop.org said: >> But the network doesn't come back. >> I was expecting it to reconnect to my AP. > Nothing to do with #10402. Continue to investigate. It works with GNOME so I expect Sugar is missing a few lines of code. http://bugs.sugarlabs.org/ticket/2808 --- Speaking of WiFi... My /var/log/messages has several clumps of things like this: Apr 27 01:46:12 xo-0d-57-33 kernel: [ 2510.094064] libertas: submit 802_11_GET_LOG (#10748 diag) grep finds 566 in about an hour I've also got one of these: Apr 27 01:54:24 xo-0d-57-33 kernel: [ 2998.013473] [ cut here ] Apr 27 01:54:24 xo-0d-57-33 kernel: [ 2998.018132] WARNING: at net/sched/sch_generic.c:258 dev_watchdog+0xf0/0x176() Apr 27 01:54:24 xo-0d-57-33 kernel: [ 2998.025368] Hardware name: XO Apr 27 01:54:24 xo-0d-57-33 kernel: [ 2998.028346] NETDEV WATCHDOG: eth0 (usb): transmit queue 0 timed out ... Does anybody want those log files? If so, who? ... -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
XO-1: Lid close/open
What is an XO-1 expected to do when I close the lid, wait a while, and then open the lid? Here is what happens on os16: When I close the lid, it goes to sleep like I expect. When I open the lid, nothing happens. I was expecting it to wakeup. If poke a key or the pad, the power light blinks but it doesn't wakeup. If I poke the power button, it wakes up. But the network doesn't come back. I was expecting it to reconnect to my AP. Here is what happens: (I had it showing the Network Neighborhood when I closed the lid.) It comes back showing no APs and no Mesh circles. It blinks the WiFi LED a few times, then shows the Mesh circles. Sometimes it shows an AP. (I normally have several APs visible.) Then it scans for mesh networks. Then it blinks again and shows some (more) APs, including mine It doesn't reconnect to my AP. The WiFi LED stays off. If I poke my AP, it reconnects. Should things work if I turn off Mesh networking using: echo 0 > /sys/class/net/eth0/lbs_mesh (There is nothing to connect to here. All it does is waste time.) I think NetworkManager got a seg fault last time I tried it. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: NANDblaster failing
> I don't see any problems in Linux. Following James' advice, I associated > with an AP and pinged the gateway for a few hours. Over ~7500 pings, I had > 1% packet loss and no errors in /ver/log/dmesg. 7500 isn't very many packets. Try ping -f. (f for flood, need to be root) It takes me 13 seconds to get to 7500 packets. If that doesn't find a problem, try longer packets. In case you don't have a man page handy... -c xxx (c for count, stops after xxx packets) -s xxx (s for size, sends packets of xxx bytes) -f puts an "interesting" load on things. You might try XO to XO rather than going through the AP and/or loading the router. (but the lights on the AP and/or router might be helpful) Or XO to PC rather than router... -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Touch-pad expectations
rich...@laptop.org said: > One absolute we know is that the touchpad hates multi-touches. If you have > more than 1 point of contact with the sensor then it will go bonkers. Due > to the button placement below the touchpad this is quite easy to do. Its > trivial to show that double touches throw the pad into a tailspin. Other > failure modes are harder to duplicate. Thanks. That may be part of my problem. I keep my left thumb on the left button. My left hand is underneath the XO and the thumb wraps around to the button but doesn't get near the touchpad. But my ring finger may be drooping down and getting close enough to cause troubles. I'll try to keep an eye on that. I would really like to see some feedback when it is doing a recalibrate. Can somebody point me at the right section of code and/or provide a few hints on how to implement that? I'm thinking of a hack, nothing clean and elegant. For an experiment, I'd be happy to dedicate any corner of the screen. (Say 1/4 inch sq, or bigger if I can't see that fast enough.) -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Kahn Academy, YouTube, XO-1
In case you haven't noticed yet, I typoed the subject. It's Khan rather than Kahn. (I think I got the rest of them right.) Thanks for all the replies. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Touch-pad expectations
Frequently, I find the touch-pad on a XO-1 to be extremely frustrating to use on cursor intensive tasks. I'm trying to figure out if this is something I should be screaming and shouting about (and rubbing it in your collective noses) or if I should shut up and get used to it. I think there are two problems. One is that there is no feedback when the recalibration is going on, so I keep trying to do whatever I'm working on. That screws up the calibration which makes me try harder which spirals downhill. The other may be a fundamental problem with touch-pads as compared to mice. The problem is that I have troubles making long motions that I expect should to work. -- Diversion/background I've used a mouse for 30+ years. I don't have a (real/non-XO) laptop so my experience with touch pads is limited to work/hacking/play with a XO-1. I worked at Xerox many years ago shortly after Card and Moran and Newell did the early work on why a mouse was so much better than cursor keys and such. I've had lunch more than once with one of them. (I forget which one(s).) His stories of how to screwup a mouse are entertaining... The key idea with a mouse is that your big arm muscles are used for the long motions and the fine finger muscles do the delicate pixel-or-two size motions. I don't see anything like that with the touch-pad so maybe my expectations are off scale. Or maybe some velocity/scaling magic is supposed to fix that mess. Or ... -- I play Implode on the XO. It's a wonderful cursor test. I play the middle game. (I'm not smart enough for the big game.) To make it interesting, I add a few more rules/constraints... They are only in my head. 0: minimize the total number of clicks 1: tallest last-click wins 2: assign a priority to the colors, so for the same height, red beats blue... 3: Of course, faster is better. (Who knows what the scale is.) 4: When you make the last click, see how fast you can get to the new-game button. You get an extra point (on some scale) if you get there before it has finished making the face. [I'll say more if anybody wants. But try your own rules first.] That last step usually involves a long motion. The new-game button is on the top. You are probably clicking down near the bottom. It's cheating to pre-position the cursor up near the top so you have a shorter motion to the new-game button. Or at least distracts from your rule 3 points. But if you ignore that, it works pretty well. Anyway, if anybody wants a cursor test case, I suggest Implode with some extra rules/constraints like the above. The details don't matter. Pick your own rules if you don't like mine It's some combination of cursor and brain limited, and a lot of the time, the cursor is the limiting factor. The key step may be that you never have to type anything. I work with my right finger on the touch-pad and my left finger on the left button. -- Back to the big picture... If I use a system with a touch-pad type cursor, do I have to recalibrate my long-motion expectations relative to a mouse? Do normal laptops have a recalibrate mode? If so, do they have any feedback while they are recalibrating? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Kahn Academy, YouTube, XO-1
I'm a bit surprised nobody has mentioned Khan Academy here before. http://www.khanacademy.org/ Salman Khan gave a fun talk at Stanford on Jan 26. You might be able to watch the video from here: http://www.stanford.edu/class/ee380/ The nominal format for EE380 talks is talk from 4:15 to 5:15, Q&A from 5:15 to 5:30. The online broadcast and video recording stops at 5:30. In reality, the break from formal talk to Q&A is whatever the speaker wants and Q&A often keeps going past 5:30. Sal's Q&A/talk didn't end until close to 6:00. (I almost missed my train.) The quick summary, is that he has made ~2000 ten minute videos and distributes them via YouTube. His target is k-14, mostly math and science. He got started when helping a cousin with math. Videos solved the scheduling problem. As long as he was making them for her, why not make them available to other people. ... They aren't fancy. The few that I've listened to have been good. He's a lively speaker: good if you like discussion, probably not so good if you want a rigidly organized formal speech. (Maybe he's good at that too if he changes hats. The Stanford talk was not formal.) He has funding from Google and Gates so he's doing what he wants and doesn't have to pay attention to outside interests/pressure or pollute his web pages with ads. He's working on a serious translation project. (top 10 or 20 languages) They are looking for volunteers. He's got a trial going with a local school. One approach is to reverse the normal lecture/homework setup. Watch the videos at home, work the problems at school where the teacher can help the students who need it. He's working on software to present math problems, grade them, give out badges (to get kids fired up), collect stats for teachers... It all looks good to me. I'm sure lots of people will hate it and/or him. He told one story... Some school board wanted to use his videos to train their teachers (sure) but they wanted to hide the videos from the kids. ??? Anyway, he has lots of good stuff that might be interesting to OLPC, or some installations. - Topic switch... How well does YouTube work on a XO-1? I'd like to look at his biology stuff. (probably others too) Is it reasonable to do that on a XO-1? (I'm running the latest os6. I'll switch back if that matters.) The recent discussion on Flash was interesting. I installed Adobe Flash. I get reasonable audio but the video is only an occasional picture. top says the CPU is close to 100%. I assume that's the limiting factor. Is there any hope that things will get better soon and/or what can I do to help? His videos are mostly whiteboard type drawings. It should be low bandwidth/low CPU. (but that may not fit what YouTube is setup for) - His web pages have a Download button which pulls an flv off archive.org and drops it into my Journal. But I can't do anything with it there. There isn't any default Activity to run it and I can't setup one for it. Is there some way to setup that binding? His videos are only ~5 to 10 megabytes. (Maybe more, I only checked a few.) But the XO-1 doesn't have room for many of those. I've got an SD card with lots of room. How do I download a batch to a SD card and run them from there? Or move my Journal to a SD card or ... [I guess by default I could move all of ~olpc there.] - I was thrashing around. While doing a download, I filled up the file system behind my Journal. It gave me a button to go delete something, but when I got there, it jumped back to the Journal full screen again before I could do anything. (I got out of that by disconnecting the ethernet cable which was fortunate because I normally use WiFi and just happened to be using wired because I had broken WiFi.) How do I find out how big something in the Journal is? -- Google for >Khan Academy OLPC< starts with a couple of links looking for Arabic translation volunteers. The 3rd one is OLPC Maroc which has some technical info that I haven't followed yet. The key step seems to be ffmpeg2theora. Is anybody familiar with that? Is it likely to help the CPU limitation? I'd be happy to do a lot of pre-processing on another more powerful machine, especially if I don't have to pollute it with too much Adobe Flash crap or at least if the un-pollute recipe is clean. (But I'll setup a blow-it-away system if the pollution is too messy.) -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: 11.2.0 Test cases
greenf...@laptop.org said: > I am starting work on a set of test cases to use for the Fedora 14 x86 > (XO-1.0 & 1.5) 11.2.0 build. Neat/thanks. How about making a list of IO devices that are likely to be used with a XO and making sure they each get at least a quick test? It's probably worth collecting recipes that were used to demonstrate old bugs. The idea is that bugs tend to be in tricky sections of code and running the recipe again after the usual development churn is likely to tickle a new bug in the same area. It's a lot of work, but my experience many years ago was that it was embarrassingly effective. Is there a UI capture/replay mechanism? That might allow automating lots of testing. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: foot pedal power
> Given that it's making 60-80W of power it's safe to assume if it's 70% > efficient you're talking about needing 100W of actual energy. 60-80 W is the max that unit can put out. An XO can't use that much power. I have the green wall-wart for an XO-1 plugged into a meter. It only reads power with a resolution of 1 watt. The most I've seen is 19 watts. With the CPU idle (not sleeping), backlight on, and battery charged, it takes 7 watts. If the CPU and memory are working, it takes 9 watts. 10-20 watts seems within reason to me. Small kids might have trouble putting out that much power for extended periods of time. For calibration, world class athletes (human powered aircraft) can put out 750 watts (1 horsepower) for an hour. Big muscles can put out more power than small ones: legs are better than arms. Using the thigh would probably work better than the calf but may not be as convenient. If anybody does the experiment, especially if you test kids, please let me/us know the results. Google for >bicycle powered TV< gets lots of info. Here is a good start: http://scienceshareware.com/bicycle-generator-faq.htm -- If a foot powered charger is going to be really useful for an XO, I think it will need some feedback mechanism so you can tell if you are pushing hard enough but not so hard that you are wasting effort. Force feedback and/or sound would probably do it. Maybe a LED. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: hwclock accuracy
> What is the accuracy of the hwclock on XOs? Can we assume that it will keep > good time over an XO's five-year lifespan? The ballpark for the hardware is 1 second per day. > We have some XO-1.5s that have their hwclocks off by 10-20 minutes. Would > this likely be due to a fault at the factory (e.g. not setting the time > before shipping them), or did they skew over time? How long ago did you last set the clock? Timekeeping is more complicated than that. /etc/init.d/halt calls /sbin/hwclock --systohc So each time you shut down cleanly, your hwclock gets updated with the current system time. That's probably a good idea if you are running ntpd like most Linux boxes. However, if you aren't running ntpd (or somehow keeping the system clock reasonably sane), you are swapping the drift on the hwclock for the drift of the system clock. Sometime in the past few years, the timekeeping corner of the kernel was cleaned up. Unfortunately, they introduced a bug in the TSC clock calibration code. The main problem for most Linux users is that it doesn't get the same answer each time it boots. It's close, but not very good if you are interested in timekeeping. If it were consistent, ntpd could easily correct for the error. That's what /var/lib/ntp/drift is for. (Small variations are expected due to temperature.) The secondary problem is that it's likely to be off by 10s of seconds per day. I'll dig out some numbers if anybody wants more details. I don't have good data on how well clocks work when power-saving is enabled. - If you actually want to know how accurate your hwclock is: comment out the line in /etc/init.d/halt, reboot, check the time, wait a week or 10 days, check again. "ntpdate -d " may be the simplest way to check the time. Grab ntpdate from a handy system. Or run "xclock -analog -update 1" on a system running ntpd and use that to calibrate your wrist watch and ... -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: USB to VGA
martin.langh...@gmail.com said: >> I don't think that is the problem. The windows >> instruction manual lists resolutions up to 1920x1...@16bits > Try it out if you want. I don't think you'll be impressed. > You can push it past 1024x768 -- it's just not a happy place. The pixel count is only a factor of 3. Is it just slow or does something else happen? Does it overflow some buffer/cache and require lots more work? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: XO-1.75 progress
>> IMHO it's better to delay the release of the 1.75 and >> force putting in a touchscreen. > It's not a matter of time, it's a matter of the price deployments are > willing to pay for it. The feedback we've heard so far is that since the > XO-1.75 without a touchscreen is every bit as functional as an XO-1.5 is, > deployments cannot justify paying the noticeable additional cost for a > touchscreen. How much more does a touchscreen cost? Is one available in the right form factor and/or how much NRE would it take to fit one in the current package? Would it help to make a small batch with touchscreens to get developers started? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: os351 on XO-1 - Browse & memory pressure
>> yum is known to just barely work and leave a lot of junk files in memory. > Perhaps someone could produce a patch to yum to remove these junk files > before it exits? That would benefit all yum users, not just > tmpfs-constrained OLPC users. I expect it's a feature not a bug. On my 384K DSL link, it takes ~10 minutes to download the metadata. If I type more than one yum command in a clump, I only pay that the first time. "yum clean all" removes all the junk. It's in the man page. So will rebooting. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: os351 on XO-1 - Browse & memory pressure
> While testing an olpc-utils rpm, I opened Browse on os351 . It immediately > puts the machine on the unusable-under-memory-pressure situation. Do a df and see if any temp file systems are chewing up a lot of memory. yum is known to just barely work and leave a lot of junk files in memory. > Personally, I haven't played with 10.1.x on XO-1s much. Has Browse been > usable in earlier F11-based releases? Is it usable on dextrose? I haven't done any serious testing, but I had no troubles opening Browse on an XO-1 and poking around via google. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: OLPC wireless startup at boot time
> - Preserving "last scan results" may improve user experience. I think that depends on the reason for powering off or closing the lid. If you moved to a new building, you probably need a new AP. If you moved from one tree to another, they are either using the same mesh channel to cooperate (or simplify things), or they are using a different one to avoid interference. If you shut down to save power but didn't move, you probably want to re-connect to the same AP/mesh. > - Waking up the WLAN & scanning ASAP is key -- I think we are reasonably > good there already It doesn't feel that way to me. On lid open, the WiFi LED blinks a few times, finds a few APs, but doesn't find my AP. After a long pause (10+ seconds), it blinks again, finds my AP, turns the LED on, and connects to my AP. I just measured the pause at 20 seconds. Is there a reason for that delay? Why doesn't the WiFi LED turn on sooner? > - Trying to pick quickly which AP to connect to is problematic. The > preferred AP may only appear on the 2nd or 3rd scan. See earlier discussions > about asking NM to wait _longer_ on that task to work on a more complete > list of available networks. What is a "scan"? Does it check one channel or all 3? Assuming that a "scan" checks all 3, I'd expect most people to be using nearby APs with good signal strength so they should be easy to find and not require extra scans. I'm guessing the first set of blinks is only checking one channel. My AP is on channel 6, so that fits if it scans them in the order: 1, 6, 11. Perhaps it should try the last active channel first, or even give the last AP a quick try. (assuming there was a last AP) -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: OLPC wireless startup at boot time
> It seems to me -- if the just-started XO (any model) is *already* receiving > identity information off the air - why BREAK that connection ? > The just-started XO should initially set its frequency to be the same as it > was whenever that XO was last used. If at least one *other* radio signal is > heard, it should leave that frequency connected -- and depend on the user to > intervene (through Neighborhood View) if now this XO should instead be > connected to a different station (or frequency). There is a layer of quirks associated with turning on the WiFi. Another way to see some of them is to use suspend on lid close. If you shift to the Neighborhood View before closing the lid, you can watch what happens after you open it. http://dev.laptop.org/ticket/10388 Normally, I use an AP. On booting, the WiFi connects to my AP before I can switch to the Neighborhood View. Any sloth on the WiFi is masked by the time it takes to start Sugar. That's probably why this area hasn't had more attention. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Radio on/off quirks
Was: Subject: Re: Announcing the OLPC OS 10.1.2 final release! If I turn the radio off, then Reboot: radio off, 3 mesh visible Reboot again: radio off, 3 mesh visible Close cover, pause, open cover: radio turns on, connects to my AP Reboot: radio on... If I turn the radio off, then Reboot: Go to My Settings/Network Radio is checked/on. Turning the radio on has a strange pattern: Right away, I get 3 mesh networks. After a second or two, there is a blink, blink, and see 2 APs. (but not my AP) After roughly 10 more seconds, blink, blink, and I see the rest of the APs I expect. Then the WiFi LED turns on and it connects to my AP. I see that when turning it on from My Settings/Network or after opening the lid. The My Settings/Network window has both X and check in the upper right corner. I'd expect the X to ignore my changes and the check to save the new settings and make any changes. Instead, the radio gets turned on/off immediately after I poke the Radio box. I suspect somebody familiar with this area might recognize something that ties things together. I'll be glad to submit trac reports if somebody tells me which quirks are interesting. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Announcing the OLPC OS 10.1.2 final release!
noise...@freemail.hu said: > 2. The control panel does not remember the unchecked state of the Radio On > checkbox. Is the problem that it doesn't remember or that it gets things backwards? I remember getting confused in that area. To me, the description of the checkbox seemed backwards from what it was doing. (But it did something and remembered what it was doing.) http://dev.laptop.org/ticket/10317 -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Bad interaction between sleep timeouts and Salut?
>> Assuming the problem is in the Avahi level, we should make >> sure that the system is coming out from suspend when >> the radio receives multicast activity directed to us so Avahi >> can properly update its > That is exactly the problem. It's taking forever-and-a-day to get that > sorted. Details at http://dev.laptop.org/ticket/9535 It's worse than just multicast not working. The basic wakeup from a packet directly addressed to the machine doesn't work reliably. I think it's good that you are pushing in this area, but please don't be discouraged if you don't see any results. There is a reason that suspend was disabled by default for os852/10.1.2 http://dev.laptop.org/ticket/10232 WiFi dies on suspended XO-1, os300 http://dev.laptop.org/ticket/10195 wifi interface eth0 disappears on the XO-1 http://dev.laptop.org/ticket/10092 Networking broken over suspend/resume on os13 for XO-1 http://dev.laptop.org/ticket/9960 wake-on-WLAN doesn't always work (duplicate) http://dev.laptop.org/ticket/9967 ibertas suspend fails on XO-1 (fixed) -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Bad interaction between sleep timeouts and Salut?
> Assuming the problem is in the Avahi level, we should make sure that the > system is coming out from suspend when the radio receives multicast activity > directed to us so Avahi can properly update its internal state and also for > activities using clique (multi-user chat rooms on server-less XMPP). A > couple more of references: I'm pretty sure that XO-1 doesn't wakeup on broadcast packets. In particular, it doesn't wakeup on ARP broadcasts. Does this work on XO-1.5? Until that gets fixed, you can set up the ARP table by hand so you can find the next layer of bugs. man arp for the details. It's not clear that you want to wakeup on generic broadcasts. That will just eat up a lot of battery to throw away junk packets. On the other hand, you probably want to wakeup on ARPs for your IP address and multicast packets if your interface is setup to listen to that address. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Sugar-devel] Enhancing Sugar to support multiple users
d...@laptop.org said: > When we discussed this while I was in Peru, one requirement they identified > is that the kid would log onto an XO one day and do some work, and then log > onto another XO the following week and continue the same work. > Assuming this still stands, this strongly calls for a network-based home > directory system with some kind of network login service (but someone with > experience in such areas should comment). This would require a number of > changes at the OS level and server level, but Sugar would be left untouched, > as far as I can think. I think there are two approaches. One is for /home to live on the file server and XOs to access their files via NFS. There may be interesting alternatives to NFS, but I'm not familiar with any of them. The other is to have a working copy of files on the local machine and manually slosh files back and forth, probably using a program to automate things. I don't think either would be great, but both could probably be made to work. Both depend on reasonable network support. Somebody would have to do some experimenting to see how many users the typical WiFi setup can support. I've worked at two places that mounted /home on our personal workstations via NFS. We did occasionally login from other machines but the main reason for using NFS was for sharing and centralizing the backup. Both worked, but there were lots of quirks, and nobody tried to take their machines home at night. Note that in addition to /home, you have to keep /etc/passwd and various other files synchronized. Another consideration when using NSF is security. It has a long history of weak security. At both of the places where I used NFS, we lived with it. (We were all mature adults working for the same company and such. Personnel and payroll were on different systems. ...) In the context of schools, it might get interesting if the teachers are storing their files on the same server. -- It's been a long time since I worked with a slosh by hand system. I've forgotten all the details. We were happy with it, but we weren't switching workstations often. I'd expect there are lots of modern software packages designed to keep laptops synchronized. One of them might fit the XO usage pattern. With the right wrapper, one of the source-control packages might work. It might be reasonable to modify the current backup/restore code to do the sloshing. One catch for an XO is that the file system is tiny so you would have to delete the previous user's files to make room for the next user. NB: You really don't want to delete them if they haven't been copied back yet. Another possible problem is that the network load is likely to be synchronized, say at the beginning of the school day when the machines get handed off from one user to the next. -- What's the backup mechanism on current school servers? If the truth lives on my XO and the school server is "just" a backup, I might be willing to not backup the school server. On the other hand, if the truth lives on the school server, I'd really want another layer or two of backup. Here is another alternative... Give each child their own SD card. Patch Sugar to look there. Or patch the system to mount /home/olpc there. ... -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: WiFi vs suspend
> is this still consistent for you? No, it started hanging again shortly after I sent that message. :( ?? > i've just released a new powerd-27 which contains a fix for XO-1 which might > affect whether power to the wlan is maintained in some cases, and might also > cause wake-on-wlan to be disabled by mistake. Thanks. I'll give it a try. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
WiFi vs suspend
I have blundered into what may be a workaround for bug 10232 http://dev.laptop.org/ticket/10232 The fix is to edit /usr/share/dbus-1/system-services/fi.epitest.hostap.WPASupplicant.service and add " -dddt" to the end of the Exec line. It ends up looking like: Exec=/usr/sbin/wpa_supplicant -c /etc/wpa_supplicant/wpa_supplicant.conf -B -u -f /var/log/wpa_supplicant.log -P /var/run/wpa_supplicant.pid -dddt [That's one long line that got wrapped.] After that change, I haven't had any hangs in over 24 hours. Without that change, I get one in a few hours. I'd be curious to see if it works for anybody else. Don't forget that it doesn't wakeup on ARP packets so you have to manually setup the arp table entry on the machines that you expect to wake it up. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
WiFi vs Suspend
Where is this on the priority list? What can I do to help?
("Go away until the release is out." might be the right answer.)
There are (at least) 4 tickets on this:
http://dev.laptop.org/ticket/10232 WiFi dies on suspended XO-1, os300
http://dev.laptop.org/ticket/10092 Networking broken over suspend/resume
on os13 for XO-1
http://dev.laptop.org/ticket/9960 wake-on-WLAN doesn't always work
(duplicate)
http://dev.laptop.org/ticket/9967 ibertas suspend fails on XO-1 (fixed)
I know about the ARP problem. I can avoid that by manually setting up the
ARP table.
I see two patterns. (Most of this should be in 10232.)
The first case looks like a simple lost interrupt/wakeup. If so, it should
be easy to get some more information.
The symptoms are that the left WiFi LED is on. The right WiFi LED blinks
when I ping that system but the CPU doesn't wakeup. Poking the touchpad
wakes it up. Then it starts processing packets.
I've got the back of a system off. Is there a handy place to get a
scope/meter on the wakeup signal from the WiFi module to the EC? Is that
signal edge triggered or level sensitive?
The other case has the left WiFi LED off. The right LED doesn't blink if I
ping it. I can wakeup the system with the touchpad but that doesn't fix the
WiFi. If I shift to the neighborhood view and poke my AP, it disconnects,
reconnects, the left LED goes on, and packets work again.
There is code that occasionally checks the other channels, looking for APs
and such. While that is going on, the left WiFi LED blinks. What happens if
the system suspends when that code is in the middle of switching channels?
Where is that code? Can I easily turn it off?
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Re: DHCP option 119
srid...@laptop.org.au said: > We are working with a department of education that is using Windows-based > domain and DHCP servers. They want to know if the XOs support DHCP option > 119, so that they can accept correct domain information for name resolution, > etc. > Does anybody have any information on this? [mur...@xo-02-33-ff ~]$ more /etc/resolv.conf # Generated by NetworkManager domain megapathdsl.net search megapathdsl.net nameserver 66.80.130.23 nameserver 66.80.131.5 [mur...@xo-02-33-ff ~]$ host www www.megapathdsl.net is an alias for users.megapathdsl.net. users.megapathdsl.net is an alias for users.megapath.net. users.megapath.net has address 66.80.60.21 [mur...@xo-02-33-ff ~]$ That's what I expect via DHCP from my local DSL modem so it looks like the XO is doing the right thing. (I didn't verify the packets on the wire/air to verify that it's using option 119.) You will have to try it to verify that it works with your setup. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: SD/MMC cards, a year later
> One frustration has been the rate of change in the SD industry. The dominant > model from a vendor in a particular size and speed may only be in production > for three or four months before being superseded. Vendors are reluctant to > properly inform Quanta of changes which might require retesting. The > result is that SD card certification is an ongoing process. How many do I have to buy before a distributor or manufacturer will cooperate? Or how much extra does it cost to get them to cooperate? Is that whole industry segment so focused on low-cost that nobody knows how to keep track of what they manufacturer/deliver? What do cell phone manufacturers do? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Disabling pretty-boot
os301 had pretty-boot disabled to help diagnose #9100 os302 doesn't do that any more. Is there a simple edit/whatever I can do to disable pretty-boot? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Suspend: RTC wakeup, sleep
Can somebody give me a pointer to some sample code that will wake up a suspended system in 5 minutes? I'm assuming there is some way to do this using the alarm interrupt from the RTC. What should I have searched for? I poked around a bit, but didn't find much. (One wiki page from a few years ago was mostly crossed out and said it was way out of date.) Shell preferred, but I can use python or c. Can somebody confirm that sleep does what I expect on suspended systems? My expectation is that the sleep timer logically ticks when suspended, but that the system won't get woken up when the sleep timer expires. For example, suppose my program does a sleep(100), and shortly after that the system suspends. If the next wakeup is 200 seconds after the start of the sleep, my program should run then (along with whatever caused the wakeup). Or if the system wakes up after 50 seconds and doesn't suspend again, my program should run 100 seconds after it started to sleep. If not, how does it work? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Broken /etc/rc.local
I botched an edit to /etc/rc.local and now my system hangs during boot. Is there a way to edit a file from firmware? Or delete a file? Is there a wiki page for this stuff? [No big deal. I can always reinstall, but this seems like a good excuse to learn something.] -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Links to (other) bugs in Trac comments
The bottom of http://wiki.laptop.org/go/Trac_conventions says 1 turns into ticket #1 with a link to that bug. I just tried that in a comment to http://dev.laptop.org/ticket/10232#comment:7 but it comes out as 9960 Did I fatfinger something that I'm just not seeing or is something broken? Or does that comment only apply to real wiki pages and not trac pages? What should I use as source text to get links to other bugs? There are a few examples in that bug a few comments back. Is there any way to fix typos like this? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: New XO-1 10.1.2 build 300
> For build 301 we've disabled pretty boot so the next time you see this > you'll be able to provide more useful information about the crash. Please > test it! Good trick. It's downloading now. > Also, on this machine are you using any external peripherals? I had a USB serial port (GPS) plugged in. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Trac#10232: WiFi dies on suspended XO-1, os300
A simple edit makes suspend/wakeup from WiFi work on XO-1 running os300. So I've been testing it. It works most of the time, but occasionally stops waking up from WiFi. Wakeup from touchpad works fine. I just submitted http://dev.laptop.org/ticket/10232 Text below. I've got a stuck case in front of me. Is there anything I should type at it to collect more info before I reboot? --- http://dev.laptop.org/ticket/10207 has the recipe to make suspend work on XO-1. (delete the "a" from "ethtool -s eth0 wol ua" in /usr/sbin/powerd) So I've been testing it. It works most of the time, but occasionally wakeup from WiFi stops working. I know about wakeup on arp not working. I can work around that by hardwiring that slot into the arp cache on my PC. I saw it stop working a couple times a few days ago. I think the WiFi LED was still on, but I'm not sure. I'm pretty sure it recovered when I poked the touchpad. This would match arp not working, but I had the cache setup... Mumble. Both times happened while I was ssh-ed in. I've got a stuck case right now. That was after working fine for several days of light traffic. (I'm running a fake ntpd server so I can monitor the clock. So it's the XO is seeing the UDP equivalent of a ping every 5 minutes from two sources.) The WiFi LED is off. It blinks when I wake it up by poking the touchpad, but the LED stays off and ping doesn't work. ifconfig says eth0 and msh0 are up. I've grabbed a copy of /var/log/messages but I don't see anything interesting in there. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Disabling powersaving temporarily from olpc-session?
p...@laptop.org said: > close, but not quite. /var/run/powerd-inhibit-suspend/ is a directory. Thanks for the correction. > google is a good reference. when all else fails, read the comments in > /usr/bin/powerd. overly verbose, perhaps, but hopefully complete. :-) That's actually /usr/sbin/powerd (sbin vs bin) Nice work. Thanks. One of the quirks about the XO is the lack of man pages. Is there an obvious/simple way to discover that the documentation for X is in the executable itself so that which X, more/vi $X will tell me what I'm looking for? I suppose it's worth a try to assume that it's a script rather than a binary blob and see if more/vi works. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Disabling powersaving temporarily from olpc-session?
martin.langh...@gmail.com said: > what would be the right way to signal to powerd that for this session > aggressive suspend should be suspended, or its timeout lengthened to several > minutes, without affecting the "normal" setting? My notes say that: touch /var/run/powerd-inhibit-suspend Will inhibit suspend. Google finds this: http://www.mail-archive.com/devel@lists.laptop.org/msg22607.html -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: New XO-1 10.1.2 build 300
> http://build.laptop.org/10.1.2/xo-1/os300/ > Here's the first build in our 10.1.2 F11/XO-1 release stream, as promised > yesterday. Thanks to Daniel Drake for working on getting this started! Thanks. > Please test and report bugs! I've seen it hang during booting, 2 out of 6-10 tries. There is one dot visible and the big X is still an X before it changes to a V and goes around in a circle. Is there anything I can do to collect more info? Do you expect suspend/restore to work? It seems to work from the touchpad and keyboard, but I can't get it to wakeup when a WiFi packet arrives. I turned on Settings/Power Automatic Power Management I turned off Settings/Radio Wireless/Radio If I wait a while (30 seconds?), the CPU/Power LED shifts to blink mode. The WiFi LED is still on. Ping won't wake it up. ping -i 5 keeps it from suspending. ping -i 6 doesn't. Once the CPU/Power LED starts blinking, ping stops working. A finger on the touchpad wakes it up. (So far, every time I've tried it.) Keys work too, but I've only tried them a few times. The My Settings/Radio Wireless/Radio checkbox seems to turn itself back on. If I turn it off, then get out of My Settings, then go back to My Settings, it's on. The WiFi LED doesn't track that checkbox. If the box is (was?) unchecked, the LED stays on when it suspends. That's what I expect. If the box is checked, the LED still stays on when it suspends. I was expecting it to turn off. (But even with the LED on, it doesn't wakeup when a packet arrives so who knows what's really going on.) -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Sugar-devel] Clocks on XOs
d...@laptop.org said: > On 6 July 2010 10:10, Bernie Innocenti wrote: >> Laptops with anti-theft enabled can get the time from the OATS server >> when it's off by more than 24 hours. Unlocked laptops don't have a way >> to synchronize the time at all. >> All we need to fix it is a trivial shell script. Why not do it? > I think it's fine that individual deployments can do it. But it shouldn't be > done globally because it weakens the security system. Am I missing something? How does that (significantly) weaken security? The user can become root and set the clock by hand. Are any deployments shipping with root access disabled? > A globally acceptable solution could be to decrease the safety guard on the > olpc-update-query check so that it corrects the time if it is (e.g.) more > than 1 hour out. Is there any reason not to always set the time when doing an anti-theft check? A 1 or 2 second window might avoid some thrashing. I'm assuming that the normal case for implementing anti-theft is that the local school server has good time and proxies for the master OATS server back at the country's main office of education or similar. -- I agree with Bernie's suggestion that unlocked laptops should do something to keep the clock accurate. Running ntpdate[1] when NetworkManager sets up a connection seems like a reasonable approach. We might want to limit that to at most every N hours, but then you have to remember when you last set the time. Do WiFi connections have a flaky mode where they bounce around a lot? If so, trying too hard to set the time will just make things worse. So make that something like don't set the time more often than every 10 hours and don't even try to contact the ntp servers more often than every 1/2 hour. 1] ntpdate is deprecated by the ntp project, but if I use that term everybody will know what I mean. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Anti-theft vs RTC (Was Re: NetworkManager time sync)
csc...@laptop.org said: >> While we have your attention on this topic... >> Do you not think that this is a security issue? In that a thief could >> put a laptop on a network with rigged DNS and have control over the >> time/date on the laptop? > A sane security system would let the user control their local time, without > jeopardizing security based on server (or "firmware") time. That's hard to do if the user is root. I'm far from a wizard on this area, but I think the key idea is that there is only one RTC and there isn't any reasonable way for the firmware to hide it from the OS. So if you let the user become root, they can set the RTC back and keep using an old lease as long as they can hide from the anti-theft server at boot time. I think a thief could do useful work on a stolen XO as long as they are willing to run with the clock set incorrectly (to bypass the firmware boot-time checks) and they are smart enough to disable any non-firmware security checks. They would have to avoid booting near an anti-theft (school) server and/or hide behind a firewall that would filter it out. Is there a good high level description of how the current anti-theft works? I've found these: http://wiki.laptop.org/go/Antitheft_HowTo http://wiki.laptop.org/go/XS-activation http://wiki.laptop.org/go/OLPC_Bitfrost The first two are full of commands to type to use the current anti-theft setup, but there isn't much discussion of the big picture. The Bitfrost doc was last edited in Feb 2007. I haven't found a discussion of the set-the-clock-back case. The Bitfrost doc describes an anti-theft daemon running on the XO at: http://wiki.laptop.org/go/OLPC_Bitfrost#P_THEFT:_anti-theft_protection It also expects file protection for the critical parts of the OS as described here: http://wiki.laptop.org/go/OLPC_Bitfrost#P_SF_CORE Has that been implemented? If so, how, and where do I find more info? I don't remember any discussion of that topic. There is also discussion of maintaining a per program view of the RTC at: http://wiki.laptop.org/go/OLPC_Bitfrost#P_RTC:_real_time_clock_protection I don't think that's been implemented either. It's probably possible to make the anti-theft stuff significantly more robust in this area. I think it would be a lot of work. The two chunks of Bitfrost above would be a good start. I'm not sure they are sufficient and/or there may be simpler ways. Security is hard. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Clocks on XOs
Was: Subject: =?ISO-8859-1?Q?Caacup=E9?= war bullettin -- day 1 ber...@codewiz.org said: > * Date not being updated > One laptop booted with clock set to the Epoch. Is that one of the old XOs that had troubles with the tiny battery feeding the TOY/RTC clock when the main battery and wall power are both disconnected? I forget the details, but I think there was a problem with the battery holder. > Oddly, the lease was accepted anyway. We need to figure out why the clock is > not being updated from the network. NetworkManager used to call ntpdate when it setup a connection. Was that an OLPC addition? I think this area gets tangled up with security and lease checking. Do we want/need two separate modes, one for the secure case and another for developers without a school server? What are the school servers doing to keep their clocks reasonable? > Why aren't we using ntp? ntp is probably overkill for XOs. Besides, who would want to give up that much ram? On top of that, ntpd doesn't get along with power saving mode. Aside from quirks like this one, is time on the XO normally good enough? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
What's the current status of suspend/resume?
I've lost track of this area. Could somebody please give me/us a review and/or update. I remember that something was seriously broken but I have forgotten the details. The Paraguay test builds I've been using on XO-1 come with power-saving disabled so I haven't had any troubles recently. Is the problem well understood and just needs fixing, or should we be looking for the next layer of bugs? What should I be running to help test this area? -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: F11 on XO-1: keyboard & trackpad stopped working
> For some bizarre reason, the trackpad and keyboard stopped working on both > Gnome and Sugar. There is a bug in the suspend logic. You will be a lot happier if you disable Automatic power management in My Settings/Power. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: the old keypad behavior gets too sensitive
> I usually operate my XO with an external USB trackball, and have no problem > with cursor positioning. Lately I've often needed to operate XOs (hdw early > G1G1, but F11 build) with the native keypad, and I can appreciate the many > complaints I have heard about using the old keypad. Does anybody remember if it worked better on (way) old OSes? How many different types of touchpads were used on XO-1s? >From a b3: psmouse serio1: OLPC touchpad revision 0x28 >From a c2: psmouse serio1: OLPC touchpad revision 0x50 I assume that version number is referring to the hardware since both of those boxes are running os140py. I can confirm that the old/b3 unit works much much better than the newer c2 one. "Too sensitive" is only half of the description. It matches one of my problems which is that I can't lift my finger up to use it to click a button because the cursor slithers away from where I had positioned it. But the other problem is that the cursor doesn't move when I move my finger. I'm probably getting tangled up with recalibrate. Some sort of UI feedback during recalibrate might be a big help. Is there a simple way to disable auto recalibrate? My test case is Implode. It's just a long series of move-click, move-click. But you can use the space bar rather than click so my finger stays on the pad for a whole game. (You need a real click to get a new game.) -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: (fwd) Re: powerd on XO-1 (was Re: New release ... OS13 )
p...@laptop.org said: > please file tickets for the problems you're seeing, and attach dmesg output, > as well as powerd.trace. (enable powerd tracing with "sudo powerd-config > =trace-on".) http://dev.laptop.org/ticket/10092 If that's not the info you need, let me know and I'll try again. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: New release of F11 for the XO-1 is available for testing - OS13
ber...@codewiz.org said: > We'll deploy this to ~4000 kids really-soon-now. Bugs reported within 1-2 > weeks have a chance of being fixed in time. os115 doesn't include powerd. Is your plan to ship it that way or do you want help testing suspend/resume? I ran it for a day or two before switching to os13. I didn't notice any troubles. os13 includes powerd. My network gets confused/broken quickly. It recovers, but that takes a minute. That's not useful for me. The good news is that the keyboard now works after resume so I can poke around. I don't know if the keyboard/cursor/resume quirk is really fixed. My cursor just stopped working. (The keyboard was OK.) I haven't noticed any troubles when powerd is disabled. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: ANNOUNCE: New F11 XO-1build 115 Paraguay
mavrot...@yahoo.com said: > I'll go with Mikus on that. With at least 3 development streams some > qualifier is needed in the naming. eg os115x1/os115x15/os115py There is another worm in this can. After installation, that name has to get out where we can easily see it. The My Settings/About My Computer window has a slot for Build. One system says: release 11 (Leonidas) Another says: 115 So in addition to the XO-1 vs XO-1.5, I think that slot should also contain "F11" or whatever upstream release is underneath everything. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: RFC: change to XO sleep behavior
> We could also consider just having the touchpad be available for > wake-from-idle-sleep, and not the keyboard, since that way you wouldn't have > any side effects from the wakeup key. But I think having the side effects > isn't a big deal, so I'd go with your proposed (b). I've gotten into the habit of poking the shift key when I want to wake things up. If I poke a real key, that probably means that I know what I'm typing at and expect it to get used as input rather than wakeup. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
What's the status of F11 on XO-1?
Last I knew, returning from suspend on an XO-1 running F11 left the keyboard/mouse broken. Is anybody working on that? What can I do to help? -- > please report your experiences with powerd on XO-1.5 I've been happy with it on XO-1. I just added a whole bunch of 0s so it never suspends. -- These are my opinions, not necessarily my employer's. I hate spam. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
