Hi James, I have been fairly familiar some time with using the basic default installation of the XS. It is specifically the combination of XO-1 build 883 / Sugar 0.94.1 with XS0-0.6 which has thrown up some issues - with collaboration.
A typical situation when we observe this recently: a workshop with 20 teachers, all who have freshly installed release 11.3.0 on their XO-1s and registered on the workshop XS and restarted. All have been accessing the Moodle pages with no problems and the links to the public content in the /library folder. I will have been using the XS network wirelessly to an XO that is running Classroom Broadcast Activity, with no difficult whatsoever. So there is no need to ping the server to understand that the XOs are all properly connected and registered, although I take your point and would have done more diagnostics if i knew how to isolate the issue with the collaboration problem we experienced. We were able to replicate the issue on identically set-up servers. The issue is: not all the other connected XOs appear in the neighbourhood view, and when trying to demonstrate collaboration using the set up above, it was only rarely that the "sharing" icon appeared on other XOs neighbourhood view even though all else seemed to be working fine. I tried using the discard network history with a few XOs only once at the end of the workshop, and we then run out of time. I tried again with my own setup later, using two XOs only, and replicated the issue but the discard history did not work then. So that might not be useful information. Perhaps I should rephrase my question: Was it intended that collaboration should work with XO-1s running release 11.3.0 using the XS-0.6 default installation? Secondary question, if this is not working, and I have made no customisation other than add some links using aliases presented as links on the Moodle home page, what can I do to trouble shoot? David Leeming -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of James Cameron Sent: Friday, 27 April 2012 7:39 a.m. To: David Leeming Cc: 'XS Devel'; 'OLPC Devel' Subject: Re: [Server-devel] Collaboration XO-1 with XS On Fri, Apr 27, 2012 at 06:38:00AM +1000, David Leeming wrote: > [...] we work around it by for instance using ?discard network > history? which seems to help. I was deeply involved in the "discard network history" feature at one point in development, and at the time the only thing it did was to remove access point names (ESSIDs) from the list of known access points. I've just checked the code and that is still only what it does. So I'm surprised it is having an effect. But congratulations for finding it does have an effect. I know nothing about the network at the location. Is there more than one access point name available? If so, at the time of the problem, the reason the button is having an effect may be because a disconnection has led to the laptop associating with another access point, and pressing the button would prevent that. If not, then the button is only serving to disconnect the laptop from the network. You may find the same effect to occur by clicking on the access point in the network neighbourhood view. Lastly, whether activities are open at the time of the forced disconnect and reconnect may be interesting. Next time, please do some technical diagnosis at the time of the problem ... use Terminal activity to ping the server. As I have recently seen examples of TP-Link with OpenWRT access points that silently block data flow, it reminds me that some diagnosis is worth doing. In the cases I observed, data flow was restored by reconnecting. That you currently reconnect to work around the problem may be a coincidence, or it might be this same kind of problem. -- James Cameron http://quozl.linux.org.au/
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