Re: Mermorize -- fixed
To follow up on this: the issue was locale related like described in #3165. I applied the same workaround for now, setting the NUMERIC locale to 'C'. A new memorize package is up at: http://dev.laptop.org/~erikos/Memorize-26.xo Victor, thanks very much for all your effort to spot this hard to find bug. Simon victor wrote: I traced the memorize bug and fixed it in games.py. I also optmised the csound code in csoundserver.py. I am not sure who needs to get this code. Could he/she get in touch with me privately?I'll give more details then. Thanks Victor ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [sugar] OLPC Usability Testing Class Project
Hi, On Thu, Mar 13, 2008 at 11:24 PM, Frederick Grose [EMAIL PROTECTED] wrote: This note is a request for the broader community to consider potential topic areas that might be prime for some usability testing. (Here is a quick review of usability testing, http://en.wikipedia.org/wiki/Usability_testing.) Professor Keith Karn in the Information Technology Department, http://it.rit.edu/it/, of the Rochester Institute of Technology (RIT) in Rochester, NY will have 4-5 graduate students (from his class of 20) propose, and over the next 10 weeks, execute a usability testing consultation around the XO or OLPC project. The class met for the first time on Wednesday 12 March 2008, and will meet, as a whole, every Wednesday 6-9:50 pm EDT through 21 May 2008. This OLPC project team will be asked to review the wiki.laptop.org and then contact me as client representative. Because of the academic schedule, we need to review and select a testing topic area in the next 7 days and have a final testing plan prepared by 26 March 2008. What usability issue is currently most timely and significant to the project? Since OLPC is developing a new information and communication technologies platform, there are many possibilities for significant target users, subsystems, components, and activities. I suggest starting first with observing general usage of the Sugar shell and base activities (Browse, Read, Write, Paint and Journal) and move from there to other activities. At this point, I don't think more focused testing will be as useful. Please think about the project design needs, possibilities, and constraints, and suggest topics or issues here or to our wiki page, http://wiki.laptop.org/go/OLPC_Rochester%2C_NY#Project_ideas. We have a few G1G1 XOs in Rochester that we should be able to use for live testing with local children. Larger scale tests could be performed with emulated XOs or hosted Sugar in the RIT Usability Laboratories. The class will be expected to go through the human subject reviews as required. Because so many cultural variables may be important modifiers of understanding user interactions with the OLPC project, perhaps there may be some more basic or common psycho-physical aspects of usability we could address that would be timely and significant for the project. Or, we might be able to recruit user participants from one of the recently settled immigrant communities in the Rochester area to delve into the internationalization and cultural domains. Having different groups of children based on age and previous contact with computers may be more important than cultural differences, in my opinion. Some reviewers of OLPC have been critical of the shortage of reported usability testing results, so far, however, if we appreciate the pace and resourcing of the development, perhaps this is a chance to address any gaps or curiosities that you may have. We have already had some feedback from the pilot tests, but until now and because of time and other constraints, hasn't been as systematic as we need. Having your commented observations about which tasks are more problematic would already be extremely useful. We would welcome your thoughts (particularly on usability issues in the near term). Thanks to everyone for all their efforts! I'm afraid now is not a good moment to ask a big involvement from the Sugar developers, but I'm sure we'll make our best at answering more concrete questions that you have. Thanks and good luck, Tomeu ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Detecting MIME type of a shared file
Tomeu, The zipfile.is_zipfile(filename) method solved my problem. I was able to successfully share a Zip file between two computers running my activity. Still some kinks to iron out, though. I'll keep your suggestion in mind for the future. Thanks, James Simmons Tomeu Vizoso wrote: On Wed, Mar 19, 2008 at 11:08 PM, James Simmons [EMAIL PROTECTED] wrote: Tomeu and Michael, It turns out Python has a method you can pass a filename to and it will identify if the file is a Zip file or not, based on the magic number, not the filename. It seems to do the trick. As a rule of thumb, I would first try to get a mime-type I can trust, and only if I cannot (I get for example application/octet-stream), I would try to sniff the type. But in your case you may be right by just sniffing it. Tomeu ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Development kernel RPMs
I am interested in testing out development kernels, but I don't have the time to setup a development environment and re-sync and rebuild my git tree every few weeks. I see that the master and stable heads have auto-built RPMs that are available at http://dev.laptop.org/~dilinger/master/ and http://dev.laptop.org/~dilinger/stable/, but there doesn't seem to be a similar resource available for development kernels. To clarify, when I say development kernel, I mean a kernel that is built from the linux-2.6 head at http://dev.laptop.org/git?p=olpc-2.6;a=summary. This appears to be the head that most closely follows Linus' tree. Would it be possible to setup an RPM auto-build system for the linux-2.6 head as is setup for the master and stable heads? Denver ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Branches listed on kernel wiki page out-of-date
The list of branches at http://wiki.laptop.org/go/Kernel appears to be out-of-date. powermgmt and devtree are listed even though they haven't been updated in 9+ months while linux-2.6 is not listed, even though it is updated fairly regularly. Worsening the problem is the statement The other branches are no longer used, and can be ignored., which implies linux-2.6 is not used, for example. I'm not particularly familiar with the reasoning behind different branches so I am hesitant to do the updates myself. Could a kernel developer update the wiki to reflect the branches currently in use? Denver ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
GSoC project - Language learning activity
Hi, I am a college UG student hoping to participate in the SoC. The foreign language learning activity project interests me. I had a look at the LingoTeach project [0] and I think that it should be convertible into a tool that can let children learn new languages and be used in OLPC deployments. I know Python and C/C++. Is there someone who is interested in mentoring this project? I would love to discuss further my ideas for this application. Also, if this is not the right place to ask, please tell me. [0]: http://lingoteach.sourceforge.net/ -- Aditya ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Building kernel on non-Fedora systems
The kernel building wiki pages (http://wiki.laptop.org/go/Rebuilding_OLPC_kernel and http://wiki.laptop.org/go/Kernel_Building) suggest that the only way to build an OLPC kernel is using Fedora Core 6 or 7. This is quite limiting for people like me who don't use Fedora regularly as we would have to dual-boot Fedora or install it in a VM just to build kernels, while most Linux distros are perfectly capable of building a normal kernel. Has any work been done on removing the dependency on Fedora Core for kernel building? Can someone provide a brief list of the reasons for this dependency so that those interested in fixing it can do so? I realize that it would still be necessary to have RPM installed to create an RPM for quick deployment on an XO, but it should be easy to at least make the kernel binary and perhaps even the initrd image without RPM. Being able to build the kernel binary seems to be sufficient for most development purposes as a developer could just add the new binary to /boot and update the /boot/vmlinuz symlink or update olpc.fth. Denver ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
New joyride build 1783
http://xs-dev.laptop.org/~cscott/olpc/streams/joyride/build1783 Changes in build 1783 from build: 1778 Size delta: 0.00M -Memorize 25 +Memorize 26 --- Changes for Memorize 26 from 25 --- + Fix sound issue when using Memorize with non-US language -- This mail was automatically generated See http://dev.laptop.org/~rwh/announcer/joyride-pkgs.html for aggregate logs See http://dev.laptop.org/~rwh/announcer/joyride_vs_update1.html for a comparison ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Building kernel on non-Fedora systems
Denver Gingerich wrote: Has any work been done on removing the dependency on Fedora Core for kernel building? Can someone provide a brief list of the reasons for this dependency so that those interested in fixing it can do so? Michael stone pointed me at the kernels existing 'make binrpm-pkg' one evening and using the olpc config file I used this to create an rpm on a debian ubuntu system without any of the Fedora stuff. This kernel booted fine and ran fine. The problems I had were in the modules. I was not able to get the depmod to quit whining but later conversations with mstone showed that I was probably not running the right depmod command. My testing only needed stuff that was static so I didn't care at the time. without RPM. Being able to build the kernel binary seems to be sufficient for most development purposes as a developer could just add the new binary to /boot and update the /boot/vmlinuz symlink or update olpc.fth. /boot is not really /boot . :) /boot is really '/versions/boot/current/boot'. you must put your kernel there or it won't be used. -- Richard Smith [EMAIL PROTECTED] One Laptop Per Child ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Face Detection and other Vision Processing (and some sample code)
I've been playing with vision processing stuff for the XO, mostly using OpenCV. I have some sample code up at http://eclecti.cc/code/face-detection-on-the-olpc-xo that does face detection surprisingly quickly. It seems that the bottleneck isn't even the OpenCV Haar Cascade algorithm, but the time it takes to initialize the v4l2 drivers. The code I wrote is just basic proof of concept stuff, but there are some amazing possibilities involved in vision processing, like recognizing sign language and gestures, drawing in air, playing motion based games, and even identifying plants and wildlife. If anyone is interested, I'd like to start developing an Activity that uses face/object detection for something more fun or useful. I'm new to Python and OLPC development, so I could use some help. Alternately, I am a student, so if anyone is interested in mentoring this as a possible Summer of Code project, that would be great. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
SoC: Language Learning Activity
Hi, my name is Steven Mohr. I study computer science dual at the BA Mannheim (www3.ba-mannheim.de) in Mannheim, Germany. This is a 1:1 combination of normal studies and working in a company. Instead of having vacation I'm working at the German Aerospace Center (DLR) in the department for software and simulation technology (http://www.dlr.de/sc/en/desktopdefault.aspx). I've already have at bit experience in an open source projects. I participated for the DLR in an open source project called catacomb (http://catacomb.tigris.org/). I would like to work at the Language Learning Activity. I've looked at the Lingoteach app and it seems to be a good basic for a port to XO. Lingoteach has already language files and even spoken examples. I would like to port it to Python. There's a C library which implements access to the language files so what we could reuse them. So my question is: Who is mentoring this task that I can talk about details? Steven ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Assorted Data on the Quality of our Networking, Presence, and Read Sharing Capabilities
Friends, Chris Ball and I spend several hours last night measuring the behavior of Read sharing. The data we collected are reproduced below. Michael A Fragment of the Critical Path for Successful Read Sharing This chart was created based on general knowledge of the Telepathy, Sugar Presence Service, Sugar python libraries, and the Read source code at http://dev.laptop.org/git?p=projects/read-activity;a=blob;f=readactivity.py;hb=HEAD * | XOs join the network | | | * | Read is started on| the sharer | | /--*--\ / \ invitations / \ the sharer is are sent| | marked public \ / \ / \--*--/ | Joiners recognize the | presence of the shared| activity | * | Join commands are issued | to Sugar | | * Read instances look for | Tubes, register callbacks | for new Tubes | | * | ... | | | * | After accepting a new | tube, the joining act.| issues an HTTP request| * | ... | | | --*--- / | \ Results / |\ /| \ / | \ success divergence failure Experimental Setup A Log of our measurements follows. All experiments were conducted with four B4s (MS1, MS2, MS3, MS4) running update.1-699 and Read-44.xo. The build log for 699 is here: http://pilgrim.laptop.org/~pilgrim/xo-1/streams/update.1/build699/devel_jffs2/build.log if you need to see what software is in the build. Simple Mesh, Sequential Invitations We created a simple mesh on Channel 11 and extended invitations to join a Phyla.pdf (under Library Biology; ~2.5 MB) session from MS1 -I (MS3, MS4). The invitations were received on both MS3 and MS4. First, we caused MS3 to accept the invitation. MS3 successfully displayed the shared PDF. Then we caused MS4 to accept the invitation. MS4 displayed the shared PDF. Simple Mesh, Simultaneous Invitations Still on Channel 11, simple mesh; we closed all open instances of Read and reopened Phyla.pdf on MS1. We extended invitations from MS1 -I (MS3, MS4) The invitations were received on both MS3 and MS4. We caused MS3 and MS4 to accept their invitations simultaneously. Both MS3 and MS4 displayed the shared PDF after about 5-10 seconds of data transfer. NB: Joining Read instances do not save the actual PDFs they receive to the DS. There is a comment in the source code stating this fact but there is no explanation of _why_ this decision was made. If you know why, please let us know. Connecting to an AP Next we connected MS1, MS2, MS3, and MS4 to the channel 6 media 802.11 AP. MS1, MS2, and MS4 all connected successfully on the first try and received presence updates. MS3's connection icon changed to indicate that it was connected to the AP but it received no presence information. 'olpc-netstatus' on MS3 reported that Salut was running but the Config field was blank. [On the other XOs, the Config field read Access point.] After five disconnect/reconnect attempts, MS3 made a successful connection to the AP and presence information was exchanged. Making Friends In order to speed up the process of issuing invitations in the future, we added each of MS[1,2,3,4] as a friend of each of MS[1,2,3,4]. All XOs saw their three friends as being available. Unfortunately, in the mesh views on MS1, MS2, and MS4, the MS4 mesh icon representing MS1 had a palette offering a Remove friend option. All the other representing icons had palettes with the Add friend option, even on the Friends View. Dynamics of maintaining connections
New joyride build 1784
http://xs-dev.laptop.org/~cscott/olpc/streams/joyride/build1784 Changes in build 1784 from build: 1783 Size delta: 0.00M -telepathy-salut 0.2.2-5.olpc2 +telepathy-salut 0.2.3-1.olpc2 --- Changes for telepathy-salut 0.2.3-1.olpc2 from 0.2.2-5.olpc2 --- + Upstream release 0.2.3 + dev.laptop.org #6575: muc receives message but can't send anymore -- This mail was automatically generated See http://dev.laptop.org/~rwh/announcer/joyride-pkgs.html for aggregate logs See http://dev.laptop.org/~rwh/announcer/joyride_vs_update1.html for a comparison ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
python programming assist.
Recently someone mentioned they were trying to improve their python programming skills. Attached is a python program than might help. It is called: create_module_list If create_module_list is executed for example like so: create_module_list string it will produce a file called: string_modules which contains a list of all the functions in string.py together with the documentation of each function. It will not work properly on packages. -- === A mathematician is a device for turning coffee into theorems. -- P. Erdos === Aaron Konstam telephone: (210) 656-0355 e-mail: [EMAIL PROTECTED] #!/usr/bin/env python produces list of components in a python module Usage: create_module_list module_name import string, sys if len(sys.argv) == 1: print Usage: create_module_list module_name else: module = sys.argv[1] exec(import + module) osmod= eval( dir(+module + )) file=open(module +_modules,w) file.write( List of + module+ modules \n + -- \n\n) index=0 while index len(osmod): element=osmod[index] file.write(element + '\n') docum=eval(module +. + element + .__doc__) if docum != None: file.write(docum + '\n') file.write(\n + ==+'\n') index = index+1 file.close() ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Face Detection and other Vision Processing (and some sample code)
Nirav Patel wrote: I've been playing with vision processing stuff for the XO, mostly using OpenCV. I have some sample code up at http://eclecti.cc/code/face-detection-on-the-olpc-xo that does face detection surprisingly quickly. It seems that the bottleneck isn't even the OpenCV Haar Cascade algorithm, but the time it takes to initialize the v4l2 drivers. The code I wrote is just basic proof of concept stuff, but there are some amazing possibilities involved in vision processing, like recognizing sign language and gestures, drawing in air, playing motion based games, and even identifying plants and wildlife. If anyone is interested, I'd like to start developing an Activity that uses face/object detection for something more fun or useful. I'm new to Python and OLPC development, so I could use some help. Alternately, I am a student, so if anyone is interested in mentoring this as a possible Summer of Code project, that would be great. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel I made a demo in Etoys for color tracking objects with the camera: http://dev.laptop.org/~bert/camTrack.pr Have good lighting and a distinctly colored object. Pick the color from the object with the color picker and a yellow ellipse on screen will track relative how you move the object. This is just a demo , more to come later... Karl ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
New faster build 1785
http://xs-dev.laptop.org/~cscott/olpc/streams/faster/build1785 Changes in build 1785 from build: 1778 Size delta: 0.00M -telepathy-salut 0.2.2-5.olpc2 +telepathy-salut 0.2.3-1.olpc2 -Memorize 25 +Memorize 26 --- Changes for telepathy-salut 0.2.3-1.olpc2 from 0.2.2-5.olpc2 --- + Upstream release 0.2.3 + dev.laptop.org #6575: muc receives message but can't send anymore --- Changes for Memorize 26 from 25 --- + Fix sound issue when using Memorize with non-US language -- This mail was automatically generated See http://dev.laptop.org/~rwh/announcer/faster-pkgs.html for aggregate logs See http://dev.laptop.org/~rwh/announcer/joyride_vs_update1.html for a comparison ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Face Detection and other Vision Processing (and some sample code)
Nirav Patel wrote: I've been playing with vision processing stuff for the XO, mostly using OpenCV. I have some sample code up at http://eclecti.cc/code/face-detection-on-the-olpc-xo that does face detection surprisingly quickly. It seems that the bottleneck isn't even the OpenCV Haar Cascade algorithm, but the time it takes to initialize the v4l2 drivers. Wow - this is amazing! And especially with this speed of ~0.25 seconds for finding a face! How are you accessing OpenCV - via SWIG or CTypes? I'd suggest to create [[OpenCV]] and start linking to infos, howto's and examples. That will make life much easier for all who want to play around with image recognition on the xo in the future. - Chris ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Face Detection and other Vision Processing (and some sample code)
OpenCV has a Python API that uses SWIG. It's in the default fedoro repo as opencv-python. Good idea, I'll add it to the wiki momentarily. On Thu, Mar 20, 2008 at 6:47 PM, Chris Hager [EMAIL PROTECTED] wrote: Nirav Patel wrote: I've been playing with vision processing stuff for the XO, mostly using OpenCV. I have some sample code up at http://eclecti.cc/code/face-detection-on-the-olpc-xo that does face detection surprisingly quickly. It seems that the bottleneck isn't even the OpenCV Haar Cascade algorithm, but the time it takes to initialize the v4l2 drivers. Wow - this is amazing! And especially with this speed of ~0.25 seconds for finding a face! How are you accessing OpenCV - via SWIG or CTypes? I'd suggest to create [[OpenCV]] and start linking to infos, howto's and examples. That will make life much easier for all who want to play around with image recognition on the xo in the future. - Chris ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Devel Digest, Vol 25, Issue 83
RE: Face Detection and other Vision Processing (and some sample code) were you testing on a machine or in an emulator? the olpc must have some wicked python optimizations to get that don to .25seconds how much data were you working with? 2008/3/20 [EMAIL PROTECTED]: Send Devel mailing list submissions to devel@lists.laptop.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.laptop.org/listinfo/devel or, via email, send a message with subject or body 'help' to [EMAIL PROTECTED] You can reach the person managing the list at [EMAIL PROTECTED] When replying, please edit your Subject line so it is more specific than Re: Contents of Devel digest... Today's Topics: 1. Face Detection and other Vision Processing (and some sample code) (Nirav Patel) 2. SoC: Language Learning Activity (Steven Mohr) 3. Assorted Data on the Quality of our Networking, Presence, and Read Sharing Capabilities (Michael Stone) 4. New joyride build 1784 (Build Announcer v2) 5. python programming assist. (Aaron Konstam) 6. Re: Face Detection and other Vision Processing (and some sample code) (karl) 7. New faster build 1785 (Build Announcer v2) 8. Re: Face Detection and other Vision Processing (and some sample code) (Chris Hager) 9. Re: Face Detection and other Vision Processing (and some sample code) (Nirav Patel) -- Forwarded message -- From: Nirav Patel [EMAIL PROTECTED] To: devel@lists.laptop.org Date: Thu, 20 Mar 2008 12:18:39 -0400 Subject: Face Detection and other Vision Processing (and some sample code) I've been playing with vision processing stuff for the XO, mostly using OpenCV. I have some sample code up at http://eclecti.cc/code/face-detection-on-the-olpc-xo that does face detection surprisingly quickly. It seems that the bottleneck isn't even the OpenCV Haar Cascade algorithm, but the time it takes to initialize the v4l2 drivers. The code I wrote is just basic proof of concept stuff, but there are some amazing possibilities involved in vision processing, like recognizing sign language and gestures, drawing in air, playing motion based games, and even identifying plants and wildlife. If anyone is interested, I'd like to start developing an Activity that uses face/object detection for something more fun or useful. I'm new to Python and OLPC development, so I could use some help. Alternately, I am a student, so if anyone is interested in mentoring this as a possible Summer of Code project, that would be great. -- Forwarded message -- From: Steven Mohr [EMAIL PROTECTED] To: devel@lists.laptop.org Date: Thu, 20 Mar 2008 17:20:56 +0100 Subject: SoC: Language Learning Activity Hi, my name is Steven Mohr. I study computer science dual at the BA Mannheim ( www3.ba-mannheim.de) in Mannheim, Germany. This is a 1:1 combination of normal studies and working in a company. Instead of having vacation I'm working at the German Aerospace Center (DLR) in the department for software and simulation technology (http://www.dlr.de/sc/en/desktopdefault.aspx). I've already have at bit experience in an open source projects. I participated for the DLR in an open source project called catacomb ( http://catacomb.tigris.org/). I would like to work at the Language Learning Activity. I've looked at the Lingoteach app and it seems to be a good basic for a port to XO. Lingoteach has already language files and even spoken examples. I would like to port it to Python. There's a C library which implements access to the language files so what we could reuse them. So my question is: Who is mentoring this task that I can talk about details? Steven -- Forwarded message -- From: Michael Stone [EMAIL PROTECTED] To: devel@lists.laptop.org Date: Thu, 20 Mar 2008 13:41:42 -0400 Subject: Assorted Data on the Quality of our Networking, Presence, and Read Sharing Capabilities Friends, Chris Ball and I spend several hours last night measuring the behavior of Read sharing. The data we collected are reproduced below. Michael A Fragment of the Critical Path for Successful Read Sharing This chart was created based on general knowledge of the Telepathy, Sugar Presence Service, Sugar python libraries, and the Read source code at http://dev.laptop.org/git?p=projects/read-activity;a=blob;f=readactivity.py;hb=HEAD * | XOs join the network | | | * | Read is started on| the sharer | | /--*--\ / \ invitations / \ the sharer is are sent| | marked public
Re: Devel Digest, Vol 25, Issue 83
On Mar 21, 2008, at 0:31 , Nehemiah Dacres wrote: RE: Face Detection and other Vision Processing (and some sample code) were you testing on a machine or in an emulator? the olpc must have some wicked python optimizations to get that don to . 25seconds how much data were you working with? It's OpenCV, not Python: http://www.intel.com/technology/computing/opencv/ - Bert - ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Google Summer of Code and OLPC
On Thu, Feb 28, 2008 at 9:28 PM, Martin Langhoff [EMAIL PROTECTED] wrote: This year, GSoC is starting early, so we should be getting in motion asap. Did we manage to get in? Or rather - did OLPC apply at all? Deadline was 12th March... we don't seem to be on the list here http://code.google.com/soc/2008/ cheers, martin ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Google Summer of Code and OLPC
Try One Laptop Per Child :) http://code.google.com/soc/olpc/about.html On Thu, Mar 20, 2008 at 11:06 PM, Martin Langhoff [EMAIL PROTECTED] wrote: On Thu, Feb 28, 2008 at 9:28 PM, Martin Langhoff [EMAIL PROTECTED] wrote: This year, GSoC is starting early, so we should be getting in motion asap. Did we manage to get in? Or rather - did OLPC apply at all? Deadline was 12th March... we don't seem to be on the list here http://code.google.com/soc/2008/ cheers, martin ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Google Summer of Code and OLPC
On Thu, Mar 20, 2008 at 10:11 PM, Roberto Fagá [EMAIL PROTECTED] wrote: Try One Laptop Per Child :) http://code.google.com/soc/olpc/about.html Ooops! I'm a tired fool it seems. Sorry about the noise! martin ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Switching between Arabic and French
Hello all, It appears I've finally figured this out. The following command, from an olpc command window, seems to get me what I want (with Right Alt as the group toggle key): setxkbmap -display :0 fr,ara -option grp:toggle (Of course, in the real world, these would be reversed :-)) What fooled me was that I was using Write as a test application. With the above settings, I get precisely what I would expect in Chat - French on the left, toggle, then Arabic on the right. In Write, when I switched to Arabic, I just got pseudo-European gibberish on the right of the text (not the margin) filling in leftward, :) but this was with a Ship.2-659 build, which might be quite venerable by now - not sure. With this in mind, it looks like it might be time to switch from Ship.2 to Joyride and update frequently, which means I will need to be able to pull down new builds more reliably than I can right now for some reason - but that's a whole different subject, so I'll post separately on it. One other comment, just a nit really: it surprised me that the mapping of I216 to [ISO_Next_Group, ISO_Prev_Group] was put into each of the main language files rather than once in the option file and then reflected in the rules as needed. This wasn't true for group mappings on my Ubuntu Linux box. Instead, based on what I see there, I'd expect an alias definition in whatever the olpc uses in keycodes (evdev?) and then its use in symbols/group. Was this inherited from upstream? If not, I'd be interested to learn the rationale for the choice. I'm only a couple of days into this stuff, and the more I read of it, the more I'm certain that there's a lot more underneath that I missed. When I see a pattern, I usually learn the most from its exceptions :-) Gxis, Lupestro ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Server-devel] Drupal on OLPC? (Martin Langhoff)
Hi Martin et al, Thanks for the comments and direction. I'm still working on options for the Uruguay requirement (BTW now rewritten, verified with tech lead in Montevideo and posted in wiki at: http://wiki.laptop.org/go/Requiremientos_Para_XO). We want any new work to be available in all deployments. Unless the XS base install works for teachers and students out of the box, we need to go where the most development support is available. Looks like you suggest current Moodle and MediaWiki plus possible added code (may be outside XS scope, e.g. client side or system level) unless we get great traction with Drupal team. If we get that traction how we do we make the solution broadly available? If we focus on Moodle and Media Wiki do we work directly with those projects or look for some maintainer/lead developer support from OLPC? On the drupal front, perhaps we can have a model where XS code can be added like activities are added to XO. E.g. core activities plus downloadable additions via well defined install. The great thing about this project is that we get direct user feedback from a real XO deployment! So Uruguayan technicians, teachers and students are part of the design from the start. For now, we will try all options until we find a viable design and developers interested in pursuing it. Any additional input on where to focus efforts re: developer recruitment and target software is greatly appreciated. Thanks, Greg S I do think Moodle i very strong in all course or student-group content and activity mgmt, and getting better all the time. It's patchy in the general content for everyone, where MediaWiki shines, and we will also have MW there to host partial Wikipedia content. There has to be a strong case for a 3rd system that overlaps so much with those 2 -- each additional system is a significant burden, as we will have to customise it quite a bit. Having said that, I _like_ Drupal, and it can be used usefully, but we are entering diminishing returns region (from a core OLPC team POV), so if the Drupal community can help get this in shape, that would be great. IOWs it won't be a priority for me. cheers, m ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] Drupal on OLPC? (Martin Langhoff)
Greg Smith (gregmsmi) wrote: Hi Sameer, I think you are on the right track in terms of laying out the use cases and relevant variables. A full matrix of options will be too complicated but we can list the main physical/HW variables and then put known deployments in each category. Something like: Server HW (RAM/Disk) - big, medium, little Bandwidth to Data Center - big, medium little, none Bandwidth to Internet - big, medium, little Power in school - enough for AP and 2 x servers, enough for one server max, not enough for any servers, Wireless access - Wireless AP, active attena, none Size of school - 10 - 50, 51 - 100, 100 - 200 Could be more precise numerical values too. After that we don't need a cross product of all variables. We can just look at known constraints on SW and services based on that. E.g. You could say, if the best HW you can get is 512MB RAM and you only have power for one box and you have medium BW to the data center you should move squid to the data center. Or a simple one like, if you have 200 kids in the school you need a wireless AP. I have deliverables for Uruguay web site building tool due this week so my OLPC spare time is up and I need to pass the buck for now :-) If you have a chance you could use the talk page at: http://wiki.laptop.org/go/XS_Server_Specification Or talk page at: http://wiki.laptop.org/go/XS_Server_Services [snipped] Hi Greg, This is what I was driving at. This week has been busy, but we have Spring break next week, so I'll spend some time on it. Three major constraints are power and connectivity and school size. Server specs, network topology etc. are items that will support that constraint space. I'll post something on the talk page in a few days. Sameer -- Dr. Sameer Verma, Ph.D. Associate Professor of Information Systems San Francisco State University San Francisco CA 94132 USA http://verma.sfsu.edu/ http://opensource.sfsu.edu/ ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
[Server-devel] Database on server
I notice that the pre-installed database for the xs build is PostGres. Now I have nothing against PostGres. It is a fine database, and was a real (ACID) database from the start, unlike MySQL. I certainly advocated that it be used in preference to MySQL for de novo projects at clients in the past. But from the standpoint of making a choice that enables the most other open source software to be installed and to run without difficulty, I believe MySQL would be a better choice today, especially since its former deficiencies have largely been rectified. In summary this is a recommendation based on a desire to lower the development costs of reusing software, not a theoretical determination of which database is better. Any thoughts? Carol Lerche ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] Database on server
I hope not a religious war on my part. I am happy with both choices abstractly (and I am a big user of sqlite3 as well, which is excellent but not so much for multi-user update-heavy applications). My point (and this whole comment is certainly directed at Martin, who is the ongoing developer) is just that after installing many open-source projects that have database access, there seem to be a non-trivial number that don't support PostGres but do support MySQL, so it might be helpful to make that the pre-installed database. As to Sameer's point that anything can be installed after the fact: that's true with a reliable connection. Having just spent several weeks in connectivity hell, I can assure you that trying to do yum install over a line that has frequent glitches is miserable, so it would be kind to try to make most common decisions in the base install. (And drupal, btw is one of those packages that supports both databases.) ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
[Server-devel] GSoC
Hello, I'm Carlos Ríos, a university student Chilean. And I want apply to the Google Summer of Code and work to help the OLPC project, I read the idea's list in the Wiki, and I found an idea that I'm sure that I can do it. The idea it's about design the admin interface of the school servers. I write to know what kind of things I need to do, before may 24 when it's the apply to Google Summer of Code, and participate in the project. well, that's it. See ya! P.S: sorry if my english it's not so good ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] Database on server
On Thu, Mar 20, 2008 at 2:47 PM, John Watlington [EMAIL PROTECTED] wrote: You are correct that postgres is in the build, but nothing currently requires it. The idmgr package is using sqlite instead. Martin can either make this call or lead further discussion. I have certainly been mulling on this -- I have experience with both, and my intention is to define a simple, but effective set of criteria and see which DB meets it best. The key webapps we care about support both (I did the support of the Pg port for a while for Moodle), support for Pg is growing and SQL syntax is converging. So support in webapps we care about is no longer the monster it used to be. One of the key metrics I will take into account is behaviour in low mem conditions -- and I plan on asking MySQL devs and Pg devs to give us a bit of help configuring them. Off the cuff, I'd compare... - Stability / sanity - Good performance behaviour in memory-constrained, low-end HW scenarios - Our core webapps/apps/libs support it - Strong dev community - multiple vendors contributing on one codebase - one or more talented and respected leaders - can resolve conflicts - growing dev activity (number of patches, number of authors) - Random apps out there support it (long last in priority...) the strategy of giving the community a significant weight is what I followed for OSVLE to pick an LMS. It picked moodle back then when it was clunkier and had less features (at first glance) than the rest. But the architecture made more sense, and the community was on fire - I'm ready to make the same mistake again! ;-) cheers, martin ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] Google Summer of Code and OLPC
On Thu, Feb 28, 2008 at 9:28 PM, Martin Langhoff [EMAIL PROTECTED] wrote: This year, GSoC is starting early, so we should be getting in motion asap. Did we manage to get in? Or rather - did OLPC apply at all? Deadline was 12th March... we don't seem to be on the list here http://code.google.com/soc/2008/ cheers, martin ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
