PlayGo Patches/Commit access
Hello all!
I've recently started learning python and sugar programming and, while
trying to be useful in the meantime, have been tinkering around with the
PlayGo activity.
I have a few patches that add basic scorekeeping, error messages
(like: There already is a stone there!), and small code cleanup. I'd like
to start tackling bigger problems (like collaboration) in the future.
However, cjb told me on #sugar the best way to get this commited is having
commit access to the git repo. I couldn't find a Commit access application
in the wiki, so I'm using part of the project hosting application here :) :
1. Project name : PlayGo
2. Existing website, if any : http://wiki.laptop.org/go/PlayGo
3. One-line description : A Go game activity
6. Committer list:
Username Full name SSH2 key URLE-mail
-
--
#1 aa Andrés Ambrois http://aambrois.homeip.net/site/files/id_rsa.pub
[EMAIL PROTECTED]
11. Translation
[X] Set up the laptop.org Pootle server to allow translation commits to be
made
12. Notes/comments: The project already is on the git repository:
http://dev.laptop.org/git?p=projects/PlayGo;a=summary . But I couldn't find
it in the pootle server. It'd be great to have it added.
Also, I'm Uruguayan so I'll take care of the spanish translation :). If anyone
needs any help with Spanish, I'm usually around at #olpc :D
--
-Andrés
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Re: PlayGo Patches/Commit access
On Saturday 19 July 2008 21:25:55 Nate Ridderman wrote: Andr�s, Go is one of my favorite games, so I'm excited to see that someone has picked up development again! It requires such balance between aggressiveness and defense, as well as local play vs spreading out on the board - I think it's a great game for kids to learn. I look forward to trying out a new version, and I agree that collaboration is an important problem to tackle soon. Adding GnuGo (http://www.gnu.org/software/gnugo/) support would be a great addition too. It would be nice to support GnuGo and collaboration over the same networking framework, but I don't know enough about the collaboration framework and Bitfrost to know if this is a possibility. GnuGo generally runs as it's own process and communicates over GTP ( http://www.gnu.org/software/gnugo/gnugo_19.html#SEC196). It seems there's a lack of documentation for people like yourself who want to pick up development on an existing activity. Most people who want shell access to dev.laptop.org also want to host a new activity. I wasn't able to find anything on the wiki about requesting shell access. Maybe putting a blurb on the wiki about who to contact would be helpful. Nate Dear Nate, Thanks for your interest! I also like Go a lot, even though I'm very bad at it! :P. I also think it's a great game for kids, most strong go players start very young, and a lot turn pro before age 15. GnuGo integration is certainly the way to go (no pun intended XD), maybe we can use a local gnugo instance speaking GTP with the Activity, for what I see, it shouldn't be too hard. The standard API for sharing (Telepathy tubes) can be used by the host to tell the other player what's going on. I'm just thinking out loud here, as I yet have to delve into the sharing API. Maybe one of the experts here can give us some pointers :). -- -Andrés signature.asc Description: This is a digitally signed message part. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: PlayGo Patches/Commit access
On Sunday 20 July 2008 01:14:48 Edward Cherlin wrote: 2008/7/19 Andrés Ambrois [EMAIL PROTECTED]: Hello all! I've recently started learning python and sugar programming and, while trying to be useful in the meantime, have been tinkering around with the PlayGo activity. Thanks. I wrote to the American Go Association when we started this project, and they wrote back, We can't tell you how excited we are. They put a note in their e-mail newsletter about us. When we can take our software to one of their events, we can talk about getting assorted game records and go literature into a library content bundle. I was a 6-kyu player in my youth, according to the teachers in my school in Korea, where I was a Peace Corps Volunteer. I learned at a chess club when I was eleven. If I had had access to the literature available now, I am sure I would have made amateur dan. I am delighted to see children getting opportunities I didn't have back then, and being able to help get even more opportunities to way more children. I can read the Korean and Japanese go literature a little, and I can provide pointers to a lot of on-line resources. The Hip-Hop Chess Federation is also interested in our work, as is International Chess Master Josh Waitzkin, author of The Art of Learning. Walter Bender started discussions with his book and chess tutorial software publishers about Free licenses on versions of the book and software. I have literature and contacts for a great many more games. We aren't going to run out of programming exercises for a very long time. Very cool! Thanks for your support, and count on me bugging you when/if I get a chance to start working on the finer details :). I have a few patches that add basic scorekeeping, Do you mean scoring at the very end of a game, or scoring games in matches, or what? Can your code estimate who is ahead in a game? I added another text box on the bottom of the board that reads: Whites: X - Blacks: Y during the game. No end results yet. I haven't even added a Pass button XD. error messages (like: There already is a stone there!), and small code cleanup. Is there a ko rule implemented? Can we get all of the different rule sets as options (Japan, China, Korea, Ing)? Yup, I implemented basic Ko, and it works on single player. Sharing works, but it bypasses most of the rule-enforcing code, so it's not very nice, so I'll have to spend some time fixing that. -- -Andrés signature.asc Description: This is a digitally signed message part. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: PlayGo Patches/Commit access
On Monday 21 July 2008 08:50:53 Bastien wrote: Hi Andr�s! I'm also a Go player and I'd really love to see this activity improve. Is it already possible to share this activity so that children can play together from two different XOs? I was unable to get this working when I last tried. If this is not possible yet, I think this should be a top priority, more than making it possible to play against GnuGo. Yes, I don't own an XO, but I've tried running two sugar-jhbuild instances, and it works fine. Well, there's no turn enforcement (you can play anywhere anytime, even if it's the other guys turn), and you can't really tell if anyone connected until they place a stone. So its very rough around the edges. I also agree on the GnuGo priority. KISS first :). As for requests about getting commit access, I thought each activity had a maintainer with its email well advertized, but this is not the case. The maintainer's email could appear either on the activity wiki page and/or in the git repository. Sadly enough, there is no such contact information neither on http://wiki.laptop.org/go/PlayGo nor in the git repo: http://dev.laptop.org/git?p=projects/PlayGo;a=summary (there is only Gerard J. Cerchio as a name...) Another good place to find the name of the maintainer would be http://wiki.laptop.org/go/Activities In other git repos, the Owner is often an email, which makes it straightforward for anyone to jump into a project. See for example http://repo.or.cz/ In gitorious.org or github.com, you can send messages to the owner: http://gitorious.org/projects/basecms http://github.com/agnathan/odf2logos/tree/master Looking forward to kibbitzing with people around here... The only mention I could find is on http://blog.circlesoft.com/ But if there ever was a maintainer, it's clear that the project is completely orphaned. -- -Andrés signature.asc Description: This is a digitally signed message part. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Server-devel] Password-less authentication with moodle (Martin Langhoff)
Hi Greg! Thanks for your insight. Currently, the scope of our project is restricted to the application (id est Moodle) layer, and my question was directed towards authentication at that level.But your notes are very relevant for installations in the future. Thank you! In reply to your comments, school servers in Uruguay have no public presence. I dont know the details but I would think this is done with a firewall blocking everything but monitoring services used by LATU. With some luck we will be able to work on these lower layer problems in deployment at later stages. Cheers! On Monday 06 October 2008 11:58:49 Greg Smith wrote: Hi Andres, I missed one key one. Have a known clean backup. Add user data to it if you can, but backup regularly. Be ready to restore to a clean backup on short notice if you are compromised and need to start from scratch. Thanks, Greg S Greg Smith wrote: Hi Andres, A few comments to get you warmed up. I will ask the current EduBlog team to give you more suggestions and details too. 1 - My understanding of the current XS design is that it has one interface visible to the Internet and another visible to the school only. It seems pretty secure that way but it can open up a bunch of security issues if you expose the School side interface to the Internet. You may need to do that in order to run EduBlog on the Internet so let us know ASAP which services are available on public routed interfaces. 2 - Use denyhosts (http://denyhosts.sourceforge.net/) or some other protection against dictionary style attacks on any public facing interfaces. 3 - Put an anti-virus tool on the box. e.g. clamAV. Especially if your PHP, Apache, Moodle, SQL services are visible publicly its important to have a second line of defense in case some virus SW gets on the box. 4 - Run a port scan yourself (e.g. Nessus). Also, watch and protect yourself against being port scanned by an attacker. Those are some suggestion off the top of my head. I'll try to collect all suggestions from EduBlog round 1 and get those to you as well. HTHs. Thanks, Greg S Date: Sun, 5 Oct 2008 14:52:25 +1300 From: Martin Langhoff [EMAIL PROTECTED] Subject: Re: [Server-devel] Password-less authentication with moodle To: Andr?s Ambrois [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=ISO-8859-1 On Sun, Oct 5, 2008 at 5:29 AM, Andr?s Ambrois [EMAIL PROTECTED] wrote: - What's your timeframe? The timeframe for our project is 5 weeks starting from last Wednesday, in which I need to cover the interface (Moodle and Wordpress theming), course configuration, authentication, modifying Write to enable blog posting, and document all this for a manual. Ouch - that's very tight! I'm glad I wasn't that far off :) . Are these required modifications documented somewhere? Not yet. We're finishing off 0.5 - will be looking into this for 0.6 or 0.7, not too far away, unlikely to be done in the next 5 weeks either :-/ cheers, m ___ Server-devel mailing list [EMAIL PROTECTED] http://lists.laptop.org/listinfo/server-devel -- -Andrés ___ Server-devel mailing list [EMAIL PROTECTED] http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] Password-less authentication with moodle
On Wednesday 08 October 2008 13:34:53 Greg Smith wrote: Hi Andres, Looks like I answered the wrong question, sorry :-( Can you tell us more about where the Moodle and EduBlog will be deployed? Will it go on the existing Debian based servers in Uruguay or will it go on a server which is in a data center and access from Uruguay schools via WAN (private or Internet)? In terms of authentication to Moodle, I think the best you can do with the XO is to have user name/password on the first try. Then Moodle cookies the browser so its recognized and you don't need to login again. That's my guess but I think Tarun knows more about the available options. Let me know if that is closer to what you are asking. Thanks, Greg S No worries, this is all good input for us! :) The solution should be independent of whether the system is installed in a school server or in a central one. This is because the first tests are likely to be conducted on a central server, and later deployed to the school servers (I understand these are Debian boxes, yes). The authentication scheme we have more or less agreed on using goes like this: --- The system checks for a cookie that stores a username and a hash of its password. -- If a cookie is found and correct. The user is logged in and transported to the blogging system. Inside the system, the user can choose to view his/her password to be able to log in from another computer. -- If a cookie is not found or incorrect, the user is sent to a username/password login page. - If the user is on an XO [0], in addition to username/password fields, there is a link to the signup process, at the end of which a password is randomly generated, and a cookie stored on the XO for future passwordless logins. With this scheme we contemplate passwordless logins from the XO (because the signup process is only available when accessing from an XO, and thus the cookie is only stored on XOs), and username/password logins from other devices. We have also decided there will be several EduBlog (Moodle) accounts associated with each XO (cookie), so other people (e.g. relatives) can use the system from the XO. There will be an interface to invite (actually add other accounts) people this way, and a drop-down menu to switch to these other accounts after automatic login. Cheers! -- Message: 2 Date: Mon, 6 Oct 2008 20:22:48 -0200 From: Andr?s Ambrois [EMAIL PROTECTED] Subject: Re: [Server-devel] Password-less authentication with moodle (Martin Langhoff) To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=iso-8859-1 Hi Greg! Thanks for your insight. Currently, the scope of our project is restricted to the application (id est Moodle) layer, and my question was directed towards authentication at that level.But your notes are very relevant for installations in the future. Thank you! In reply to your comments, school servers in Uruguay have no public presence. I dont know the details but I would think this is done with a firewall blocking everything but monitoring services used by LATU. With some luck we will be able to work on these lower layer problems in deployment at later stages. Cheers! On Monday 06 October 2008 11:58:49 Greg Smith wrote: Hi Andres, I missed one key one. Have a known clean backup. Add user data to it if you can, but backup regularly. Be ready to restore to a clean backup on short notice if you are compromised and need to start from scratch. Thanks, Greg S Greg Smith wrote: Hi Andres, A few comments to get you warmed up. I will ask the current EduBlog team to give you more suggestions and details too. 1 - My understanding of the current XS design is that it has one interface visible to the Internet and another visible to the school only. It seems pretty secure that way but it can open up a bunch of security issues if you expose the School side interface to the Internet. You may need to do that in order to run EduBlog on the Internet so let us know ASAP which services are available on public routed interfaces. 2 - Use denyhosts (http://denyhosts.sourceforge.net/) or some other protection against dictionary style attacks on any public facing interfaces. 3 - Put an anti-virus tool on the box. e.g. clamAV. Especially if your PHP, Apache, Moodle, SQL services are visible publicly its important to have a second line of defense in case some virus SW gets on the box. 4 - Run a port scan yourself (e.g. Nessus). Also, watch and protect yourself against being port scanned by an attacker. Those are some suggestion off the top of my head. I'll try to collect all suggestions from EduBlog round 1 and get those to you as well. HTHs. Thanks, Greg S Date: Sun, 5 Oct 2008
Re: simple hacks to improve the performance of the Sugar UI
On Friday 17 October 2008 17:56:05 Erik Garrison wrote: XO Users, In short, I have bundled a set of 'hacks' which generally (and in my observation, dramatically) improve the user-perceived responsiveness of the Sugar UI. The hack bundle is available at http://dev.laptop.org/~erik/faster-hacks.zip Here are a couple of more patches for your bag of tricks: [PATCH] sugar-homewindow-no-transition.patch This removes the usage of TransitionBox from HomeWindow.py. TransitionBox is used to animate the Xo Guy while moving between zoom levels. This patch makes transition from activities to the home box almost instantaneous and removes the annoying flickering. [PATCH] sugar-optionally_disable_frame_on_tabbing_v2.patch This is an updated version of your patch that also sets _RAISE_DELAY to 0 if /home/olpc/no-frame-on-tabbing is present. It makes tabbing almost instantaneous on my XO. -- I have tried your hacks and I must say the frame behaves a lot better with compositing enabled. I haven't run any serious memory pressure tests, but I can have around 8-9 activities open before encountering OOM problems. No idea what the previous statistics were. Cheers! -- -Andrés ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: simple hacks to improve the performance of the Sugar UI
On Saturday 18 October 2008 03:35:14 Andrés Ambrois wrote:
Here are a couple of more patches for your bag of tricks:
*Gah* forgot the attachments
--
-Andrés
--- tabbinghandler.py.bak 2008-10-17 20:04:11.0 +
+++ tabbinghandler.py 2008-10-18 00:19:06.0 +
@@ -15,6 +15,7 @@
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import logging
+import os
import gtk
import gobject
@@ -22,7 +23,7 @@
from view.frame import frame
from model import shellmodel
-_RAISE_DELAY = 250
+_RAISE_DELAY = 0
class TabbingHandler(object):
def __init__(self, modifier):
@@ -59,7 +60,8 @@
else:
shell = view.Shell.get_instance()
-self._frame.show(self._frame.MODE_NON_INTERACTIVE)
+if not os.path.exists('/home/olpc/no-frame-on-tabbing'):
+self._frame.show(self._frame.MODE_NON_INTERACTIVE)
def __timeout_cb(self):
self._activate_current()
--- tabbinghandler.py.bak 2008-10-17 20:04:11.0 +
+++ tabbinghandler.py 2008-10-18 02:54:08.0 +
@@ -15,6 +15,7 @@
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import logging
+import os
import gtk
import gobject
@@ -22,7 +23,10 @@
from view.frame import frame
from model import shellmodel
-_RAISE_DELAY = 250
+if os.path.exists('/home/olpc/no-frame-on-tabbing'):
+_RAISE_DELAY = 0
+else:
+_RAISE_DELAY = 250
class TabbingHandler(object):
def __init__(self, modifier):
@@ -59,7 +63,8 @@
else:
shell = view.Shell.get_instance()
-self._frame.show(self._frame.MODE_NON_INTERACTIVE)
+if not os.path.exists('/home/olpc/no-frame-on-tabbing'):
+self._frame.show(self._frame.MODE_NON_INTERACTIVE)
def __timeout_cb(self):
self._activate_current()
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Re: simple hacks to improve the performance of the Sugar UI
On Saturday 18 October 2008 03:45:49 Andrés Ambrois wrote:
On Saturday 18 October 2008 03:35:14 Andrés Ambrois wrote:
Here are a couple of more patches for your bag of tricks:
*Gah* forgot the attachments
Its almost 4 am here, please bear with me...
Scratch that first one, here is sugar-homewindow-no-transition.patch
--
-Andrés
--- HomeWindow.py.orig 2008-10-18 00:16:52.0 -0200
+++ HomeWindow.py 2008-10-18 00:06:19.0 -0200
@@ -22,7 +22,6 @@
from view.home.MeshBox import MeshBox
from view.home.HomeBox import HomeBox
from view.home.FriendsBox import FriendsBox
-from view.home.transitionbox import TransitionBox
from model.shellmodel import ShellModel
from model import shellmodel
@@ -60,15 +59,11 @@
self._home_box = HomeBox()
self._friends_box = FriendsBox()
self._mesh_box = MeshBox()
-self._transition_box = TransitionBox()
self._activate_view()
self.add(self._home_box)
self._home_box.show()
-self._transition_box.connect('completed',
- self._transition_completed_cb)
-
model = shellmodel.get_instance()
model.connect('notify::zoom-level', self.__zoom_level_changed_cb)
@@ -120,22 +115,7 @@
self._level = level
self._activate_view()
self.remove(self.get_child())
-self.add(self._transition_box)
-self._transition_box.show()
-
-if self._level == ShellModel.ZOOM_HOME:
-size = style.XLARGE_ICON_SIZE
-elif self._level == ShellModel.ZOOM_FRIENDS:
-size = style.LARGE_ICON_SIZE
-elif self._level == ShellModel.ZOOM_MESH:
-size = style.STANDARD_ICON_SIZE
-
-self._transition_box.set_size(size)
-
-def _transition_completed_cb(self, transition_box):
-current_child = self.get_child()
-self.remove(current_child)
if self._level == ShellModel.ZOOM_HOME:
self.add(self._home_box)
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Re: G1G1 updates, Lennon video and other vids
On Saturday 27 December 2008 20:28:10 da...@lang.hm wrote: On Sat, 27 Dec 2008, Samuel Klein wrote: Hi, The Lennon video that's been murmured about for weeks has been released. I'm curious to see reactions from the list. If anyone makes a screensaver version of the opening sequence, which I love, I'll send you my first attempt at a memory-doubled XO. I'm hoping to get more details about how it was made to post as well... It's had 50,000 views (wow, make that 65k since I wrote this draft at lunch) in the past day. Details and a couple other awesome video links are up on the blog. http://blog.laptop.org personal opinion here, I don't like using digital fakery to make dead celebreties say things that they never said (movies that are clearly fiction are an exception to this) In this case I think the quality of the audio splicing also leave a lot to be desired (but then again, I've never listened to recordings of Lennon talking, so it could be his real speech pattern) the other videos on the blog are very interesting. I hadn't heard of this blog before, thanks for the pointer. David Lang ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel I also wouldn't feel comfortable articulating dead people imagery to make it seem like they said something they didn't. No matter how obvious it may seem that it is an actor, no matter how much his wife agrees with the statement. I feel Sagan's voice in this video would have made a true a deep message: http://www.youtube.com/watch?v=hLkC7ralR30 I would suggest Sagan's Cosmos and Pale Blue Dot passages for future ads of this nature. There are countless great poets out there, no need to fake them :) -- -Andrés signature.asc Description: This is a digitally signed message part. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Is it possible to disable sharing for an Activity?
On Monday 02 February 2009 21:30:46 Carol Farlow Lerche wrote: I'm guessing someone has already suggested this on some list or other, but in my experience kids like to watch over each other's shoulder, and a default collaboration of everyone watches, one person types vnc would in my opinion be the 80 of a collaboration 80-20 rule. I think this ought to be implemented in the sugar infrastructure, and then let activities that have an obvious extended collaboration (such as two person games or shared authorship documents) do something more. Please take a look at Chris Ball's recent work on MPX over VNC: http://blog.printf.net/articles/2009/01/26/multi-pointer-remote-desktop 2009/2/2 Wade Brainerd wad...@gmail.com There might be something in the Sugar Almanac, see http://sugarlabs.org/go/ActivityTeam/Resources for a link. Alternately, an example of how to disable sharing is here: http://git.sugarlabs.org/projects/math/repos/mainline/blobs/master/mathac tivity.py#line75 Note to Sugar toolkit guys, I'd love to have a formal API to indicate collaboration not supported. Best, Wade On Mon, Feb 2, 2009 at 6:10 PM, James Simmons jim.simm...@walgreens.comwrote: First, I want to praise whoever put together the Sugar packages for Fedora 10. After struggling with Xubuntu and with sugar-jhbuild on openSUSE I finally have a sugar test environment where everything seems to work! It was well worth wiping out my openSUSE install and starting over with a new distribution. I'll probably do the same to my Xubuntu box eventually. Second, now that I have this I want to perfect collaboration on my two Activities, Read Etexts and View Slides. Unfortunately, I am convinced that collaboration in View Slides that involves sending large Zip archives over the network is not and never will be practical. What I'm thinking about now is making the person sharing a slide show see only the image being viewed on the XO that has the full presentation. The master XO would page through the slides and those sharing would follow along. I'm not sure that's practical, either. While I'm figuring this out, what I'd really like to do is release a version of View Slides that has no collaboration at all. This would mean hiding the control on the Activity toolbar that supports collaboration. When I figure out something intelligent to do with collaboration I'll restore it. Is this possible, and how would I go about doing it? Thanks, James Simmons ___ 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 signature.asc Description: This is a digitally signed message part. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Sugar-devel] FoodForce II Beta Release
On Friday 08 May 2009 03:24:30 pm Mohit Taneja wrote: Hi, The Beta version of the FoodForce2 game has been developed for the XO. The features that have been incorporated are : snip Congratulations! Looks great! I had a chance to see a presentation on this game last October in El Salvador and I was impressed with the work. May I ask what license is it under? FoodForce2 Team -- Andrés ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Fwd: Xo 1.5 wlan]
On Sunday 31 May 2009 11:15:58 am Tomeu Vizoso wrote: On Sun, May 31, 2009 at 16:09, Tiago Marques tiago...@gmail.com wrote: On 5/31/09, John Watlington w...@laptop.org wrote: On May 30, 2009, at 12:04 PM, Reinder E.N. de Haan wrote: Subject: Xo 1.5 wlan Date: Thu, 07 May 2009 19:56:27 +0200 From: Reinder de Haan r...@mveas.com To: John Watlington w...@laptop.org Hello, I have a couple of questions regarding the wlan module in xo 1.5; 1) will it be an off the shelf module (3th party) or a quanta/olpc 'private' module One of the complications of the Gen 1.5 design has been improving the WLAN module. The existing module takes lots of power, and the USB driver still needs extensive modification to speed up suspend/resume. Being power the major concern, will wireless range also be enhanced in some way? Most of the early claims that the XO had a top class wireless range have not materialized, at least when I compare it to other devices like a Fon2100 or an IPW2200 from Intel, which is probably the device with best wireless range that I've ever seen. A way to change the transmit power in software would be great for power and range, depending on the application. Does the module have anything like that or are you just mainly focusing on power and relegating range to 2nd place? I think that there have been recent improvements in the algorithm for choosing the transmission power in the linux kernel. I'm not sure if all wifi drivers benefit from it, but a laptop with b43 has improved dramatically its range after updating to Ubuntu Jaunty. I think what you're talking about is the rate selection algorithm, I dont think the kernel dynamically changes the Tx power. Linux has moved to minstrel [0] as its default rate control algorithm, which is way better than what we had previously in dealing with lots of collisions, where slower rates may not increase the chance of getting a packet through. This scenario is common in schools with lots of XOs. Some drivers still have their own algorithm, it is probable that the closed fullmac Marvell implementation has one. [0] http://linuxwireless.org/en/developers/Documentation/mac80211/RateControl/minstrel Best regards, Tiago Marques Unlike Gen 1, we don't have the time or expected market to develop and certify a custom module. The current plan is to use an existing WLAN module, based on the Marvell 88W8686 and connected to the system using an SDIO interface. 2) if it is a private module please break out jtag and the serial port for debugging (xo 1.0 only had jtag.. serial ended right at the balls of the chip :-( Sorry, the module doesn't bring any of the internal debugging signal out. 3a) if its a 3th party moduel is it posible to buy it somewhere ? Yes and no. There are 88W8686-based SDIO modules already available, and electrically/software-wise they will be identical to the one we are planning to use. The actual module used in XO-1.5 will have a half-height miniPCI-e form factor. Even if you could buy it in small quantities, you would have to arrange an adapter board to use internally. Cheers, wad ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Sugar-devel] RFH - Journal corruption reports fom 8.2.1 users in Uy
On Thursday 20 August 2009 06:58:48 pm Martin Langhoff wrote: On Thu, Aug 20, 2009 at 7:44 PM, Tomeu Vizosoto...@sugarlabs.org wrote: Would be nice to have more details about the failure so we can both fix it and propose the best tool for the job. Maybe a ceibal jam volunteer with some linux knowledge would like to work with us on this? Many are reading olpc-sur -- I hope someone might help. I'll help in any way I can. Would an upload webservice similar to Sacha's for uploading the necessary datastore bits help? We can then distribute a simple cli tool that uploads the data. Will collecting the indexes be enough or do you need the whole datastore? cheers, m -- -Andrés ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Sugar-devel] RFH - Journal corruption reports fom 8.2.1 users in Uy
On Friday 21 August 2009 05:08:28 am Martin Langhoff wrote: 2009/8/21 Tomeu Vizoso to...@sugarlabs.org: Yes, though if we manage to get the logs dir of a machine just after the DS was lost, there's lots of chances we are going to be able to The ones on the ramdisk? :-( I think ~/.sugar/default/logs We're holding a jam the 29th, so maybe someone affected could attend, otherwise it'll be very hard for teachers to upload large files (ADSL broadband has a 128 Kbps uplink here in .uy). I'll post a mail in Sur and olpc-uruguay, after I get some sleep. m -- -Andrés ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Sugar-devel] RFH - Journal corruption reports fom 8.2.1 users in Uy
On Friday 21 August 2009 05:10:21 am Tomeu Vizoso wrote: 2009/8/21 Martin Langhoff martin.langh...@gmail.com: 2009/8/21 Tomeu Vizoso to...@sugarlabs.org: Yes, though if we manage to get the logs dir of a machine just after the DS was lost, there's lots of chances we are going to be able to The ones on the ramdisk? :-( Is ~/.sugar/default/logs in the ramdisk? This would be the first time I hear about it. If it's like that, maybe Andres could modify a XO to have that dir in the nand and wait for it to happen? Remember that Ceibal XOs have root access locked-down. And I recently found out that since the key-delegation stuff was implemented, we can't request developer keys. Not from OLPC at least, and LATU is not providing that service that I know... I'll also try to flash an XO with 8.2.1 and try to reproduce. Regards, Tomeu m -- martin.langh...@gmail.com mar...@laptop.org -- School Server Architect - ask interesting questions - don't get distracted with shiny stuff - working code first - http://wiki.laptop.org/go/User:Martinlanghoff -- -Andrés ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Is Project Ceibal violating the GNU General Public License?
On Monday 24 August 2009 10:11:54 am Walter Bender wrote: On Mon, Aug 24, 2009 at 3:48 AM, John Gilmoreg...@toad.com wrote: Re: [Sugar-devel] RFH - Journal corruption reports fom 8.2.1 users in Uy Remember that Ceibal XOs have root access locked-down. And I recently found out that since the key-delegation stuff was implemented, we can't request developer keys. Not from OLPC at least, and LATU is not providing that service that I know... Could someone please clarify this? According to Ceilbal (24-08-09): We have delivered developer keys in the past, and we will deliver them to the owner of the machine upon request. Therefore, I do not think that there is a violation of the GPL. I wrote to Ceibal asking for information and this is what they replied: Hola Andrés, Debido al sistema de seguridad incorporado en la XO, el Plan Ceibal no brinda la clave de desarrollador. Esto se debe, a que una persona con acceso a la clave podría desactivar la seguridad de la máquina. Cualquier otra consulta, no dudes en volver a comunicarte. Translation: Hello Andrés, Because of the security system built into the XO, Plan Ceibal doesn't provide developer keys. This is because a person with access to the key could deactivate the security of the machine. Don't hesitate in contacting us for any other questions. -walter It sounds like Project Ceibal is explicitly violating the GNU General Public License on much or all of the software that it ships: * It provides binaries without source code, and without a written offer of source code. * It provides binaries in a physical form (laptop) which is protected against modification by the end-user, so that those users cannot replace the GPLv3-licensed software on the laptop with later versions. More than 20 packages shipped are GPLv3 licensed, as of 12 months ago, including the Coreutils (most shell commands), tar and cpio (used for software updates), and gettext (internationalization). GPLv3 requires that the relevant passwords or keys must be supplied to the end user -- including both the developer key and the root password. * Some programs are modified, but the modified versions are not marked to distinguish them from the original GPL-licensed programs. There are other less important violations as well (most are documented at bugs.laptop.org; search for GPL). I would be happy to learn that the children receiving these laptops have full access to source code, ability to upgrade their laptops at will, and can tell modified from unmodified software. Please let me know what is really happening in the schools of Uruguay. John Gilmore ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel -- -Andrés ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Testing] first play with new XO 1.5 machines
On Wednesday 21 October 2009 06:41:54 pm Ed McNierney wrote: I also want to point out that in cases where 802.11s mesh operation is desirable, the Open802.11s stack (http://www.open80211s.org/) should be investigated. There's no reason Open802.11s software can't be used to make an XO a Mesh Portal Point (MPP). The only thing we're really losing in XO-1.5 is the ability of an XO to serve as a MPP in low- power mode, when the laptop is otherwise asleep. It would be great to get that working someday, but not today. Huge +1 on not reinventing the wheel and using upstream's capabilities for meshing*. AFAIK the only way to use the open11s support in the mac80211 stack on the XO-1 is with a thin firmware and the libertas_tf driver, is this option available for the new chip in the XO-1.5? I'm guessing this device also uses a fullmac driver. *: I am aware that OLPC's efforts in 11s predate proper support in mac80211 and thus were the only option. - Ed ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel -- -Andrés ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: wlan interface (was: first play with new XO 1.5 machines)
On Friday 23 October 2009 09:09:31 am Daniel Drake wrote: 2009/10/23 Albert Cahalan acaha...@gmail.com: Thus, properly done, the XO labled C might have either of: a. wlan0 to reach A, and wlan1 to reach B (same hardware) b. wlan0, from which wlan0_0 and wlan0_1 are instantiated It can't do this, unless it has 2 independent clocks in the wifi hardware. I do not know of any hardware that does this. The issue is that A and B are both hosting their own networks, they are both beacon masters, spewing beacons based off their own clocks. C can either talk with A, by finding the beacons, adjusting its own clock to match. (at this point, any frames coming from B will be heard as noise) or it can adjust to B's clock, in order to speak to it (and everyone else who's synchronized to B). At this point, frames coming from A are just noise. I agree. The radio and association limitations in wifi are not so easy to abstract away. A drop in replacement to 802.11s that might be worth looking at is batman- adv[0]. It does proactive routing (in the spirit of Cerebro) at layer 2. [0] http://www.open-mesh.org/wiki/batman-adv Daniel -- -Andrés ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: XO 1.5 - CONTENTION WINDOW
On Wednesday 02 December 2009 10:49:38 am Martin Langhoff wrote: On Wed, Dec 2, 2009 at 1:32 PM, Daniel Drake d...@laptop.org wrote: Ok, and what about the documentation? Also - what does the firmware on the card do with that? Could it be overwritten by a DCW algorythm? Are you sure that you're using a PHY mode with fixed bounds for the CW? The default values you suggest (31-1023) are for DCF. I think those are set by the AP in HCF. You could check if those values change in different environments (with an AP that properly supports those extensions) to test that. Here's what 802.11-2007 says about the Hybrid Coordination Function: The contention window limits aCWmin and aCWmax, from which the random backoff is computed, are not fixed per PHY, as with DCF, but are variable (contained in the MIB attribute tables dot11QAPEDCACWmin and dot11QAPEDCACWmax for an AP and in the MIB attribute tables dot11EDCATableCWmin and dot11EDCATableCWmax for a non-AP STA) and assigned by a management entity or by an AP. m -- -Andrés ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [IAEP] Mesh Dreams = OLSR
On Tuesday, August 24, 2010 11:26:23 am Chris Ball wrote: Hi Reuben, Consider the benefits of using open source software versus our closed source firmware and partnering with communities like Freifunk whose network is ~ 800 node, guifi.net is almost 10k nodes in Barcelona, Athens Wireless is 5k nodes. The fact that a custom mesh algorithm would have to run on the CPU -- prohibiting any kind of idle-suspend -- makes it a non-starter for an XO deployment in my eyes. Did you have any thoughts on this? We (MontevideoLibre, a free wireless community network) have been using OLSR for a while now. And though the topology in a typical OLPC scenario is very different, we've talked about assembling an image running OLSRd for a while. Anyway, I dont have time for a full response to this thread right now, but I had a conversation with smithbone and silbe a while back that may be illustrative of the worse-case scenario in terms of power consumption: aasilbe: I think a working PoC could gather a lot interest from deployments... silbe aa: one thing to consider is the power draw. with libertas_tf, the host CPU needs to be powered on. aayes aasilbe: do you have an idea of what that means in actual numbers? aaperhaps smithbone has a guesstimate silbe aa: counter-question: are you thinking of running the protocol while the XO is powered off (screen off, everything in suspend with wake-on-WLAN) or just during regular operation? silbe for the latter case, it might not make much of a difference, especially if automatic power management (automatic suspend) is disabled. smithbone Running the system is going to cost you in the 5W range. silbe in the powered off case it's going to make a huge difference. I don't think it'll be able to run for more than 3h while there's any traffic. aasilbe: one of the things I want to find out is the convergence time of the different options silbe aa: i.e. the time until the network/mesh is stable? aayes silbe aa: if you were in europe, you might try getting funding from the EU for that ;) aasilbe: also, BATMAN has a layer 2 kernel module, maybe we could make it aware of the PM state? silbe they seem to pay some pretty sums for mesh research * aa migrates to Europe aa:P silbe aa: it should just integrate into the kernel PM QoS framework I cuppose, see Documentation/power/pm_qos_interface.txt aasilbe: will do silbe aa: oh, and some recent mail from me has a link to nice slides explaining the PM QoS framework aasilbe, smithbone: do you guys know if wol would work with libertas_tf? aasilbe: to sugar-devel? silbe aa: no idea, sorry. silbe aa: I think to de...@l.l.o aasilbe: found it, thanks! smithbone aa: which gen? aasmithbone: XO-1 smithbone aa: on XO-1 the wakeup is generated by strobing a signal to the EC. So libertas_tf would need to support strobing that signal aasmithbone: thanks a lot, is this documented somewhere? aatoo bad the firmware is closed :( smithbone aa: no. because none of the systems you are talking about have open documentation aasmithbone: I understand smithbone aa: But I can certainly tell someone what gpio on the wlan module to strobe and for how long. -- -Andrés signature.asc Description: This is a digitally signed message part. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
[Server-devel] Password-less authentication with moodle
Hello all! I am, together with Pablo Flores, working in preparing EduBlog for deployment in Ceibal (yay!). However, one of the big challenges ahead is deciding on the security infrastructure needed. So I've decided to consult the gurus at server-devel =) . The problem is not in finding novel or ultra-secure algorithms, but in easily deployable and usable mechanisms. The MAC authentication method, described in earlier threads, is an easy hack, but not very secure (MACs can be spoofed, etc), however I wonder if an auth plugin for moodle with this scheme has been implemented. The other real solution that comes to mind would be TLS (SSL), maybe using the DSA SSH key generated in first-boot? I believe this would involved modifying Browse to use that file, and also gathering the XOs public keys manually and add them to the server, which is a logistic nightmare. I hope I'm wrong in this, could you advise me? Being password-less is one of the key concepts in the XO's design. And rightly so, for both usability reasons, and the logistic problem of handling lost/compromised passwords. So we need to try and stick to it as much as possible. Cheers! -- -Andrés ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] Password-less authentication with moodle
Hola Martin! On Saturday 04 October 2008 09:22:11 Martin Langhoff wrote: On Fri, Oct 3, 2008 at 7:22 PM, Andrés Ambrois [EMAIL PROTECTED] wrote: I am, together with Pablo Flores, working in preparing EduBlog for deployment in Ceibal (yay!). However, one of the big challenges ahead is deciding on the security infrastructure needed. So I've decided to consult the gurus at server-devel =) . Hola Andres! - What's your timeframe? The timeframe for our project is 5 weeks starting from last Wednesday, in which I need to cover the interface (Moodle and Wordpress theming), course configuration, authentication, modifying Write to enable blog posting, and document all this for a manual. - Are the Ceibal machines registering with the Ceibal servers in any way? My understanding of the current security architecture in Ceibal is almost non-existent, as I'm not working in LATU, and it has been a black box for external developers. I realize this will seriously hamper any take at the authentication problem, but I guess it's clear that there's little I can accomplish in this sense from the timeframe above. However, I believe there will be someone exclusively working on the security of the system. I will make sure to point him/her to this thread on Monday when we meet. The other real solution that comes to mind would be TLS (SSL), maybe using the DSA SSH key generated in first-boot? I believe this would involved modifying Browse to use that file, and also gathering the XOs public keys manually and add them to the server, which is a logistic nightmare. I hope I'm wrong in this, could you advise me? That is one of the paths we are exploring :-) with an additional tweak to the 'register' action that retrieves the self-signed cert of the server on the XO as a trusted cert, and gives the XS the cert of the XO. This of course needs a change in the register API - (minor) code changes on the XO core Sugar libs and in Browse. I'm glad I wasn't that far off :). Are these required modifications documented somewhere? cheers, m -- -Andrés ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
