[i945G] Xorg freezes when using OpenGL on Intel i945

Disabling compiz and not use OpenGL based application solve the problem ...

Thank you for reporting this bug and helping make ubuntu better. This sounds like a GPU freeze and there is more information about this kind of bug here: https://wiki.ubuntu.com/X/Troubleshooting/Freeze . There are instructions there for how to get a batchbuffer dump which we need.

This comment goes to bug 400934, bug 451518, bug 475429, bug 500686,
bug 501875, bug 342675, bug 4611163 and 493111.

We have had several reports of freezes (GPU hangs) on i945 chipsets
(945G, 945GM and 945GME, all of which uses the GMA950 graphics core)
in Karmic. I would like to get some testing going so that we may
identify the cause and give upstream all the information they need
(and possibly some they do not need) so that they can fix this before
Lucid is out. I have set up a wiki page to coordinate the effort:
https://wiki.ubuntu.com/X/Lucidi945Freezes . There is a list of test
that I think will be useful in order to isolate where the problem is
and a table where you can fill in your test results. If we're lucky
there is only one underlying problem, and we will probably get
consistent test results. Otherwise, different test results may group
the problems in different categories.

I realize that doing all the tests can be quite time consuming (it
calls for tests on both Karmic and Lucid), and if you are only able to
do some of the tests it would be nice if you could fill in those cells
in the test result table.

My initial guess is that the bug is in mesa, since it seems to be
related to 3D operations. It would be nice if we could also get some
testing of different mesa versions, but I'm not aware of any that are
pre-built yet.

Okay, thanks.

I'll will do all the tests as soon as possible on different computers built with i945.

I have uploaded an older version of mesa to my "old" PPA: https://launchpad.net/~gomyhr/+archive/old/+packages . By testing this, we can find out if this is caused by a bug in mesa which is introduced after version 7.5.

Unfortunately, installing it is probably not as easy as just adding the PPA to /etc/apt/sources and do `sudo apt-get update; sudo apt-get upgrade`, since the version in the PPA is older than then one in karmic and I didn't do any PPA magic to make it want to upgrade anyway. The easiest way I can think about is probably to download all the deb-files for your architecture (*i386.deb) to an empty folder and do a `dpkg -i -O *.deb` in that folder. That will install only the packages that already have an installed version on your system.

If Karmic freezes with this version, I can try to go all the way back to the Jaunty version.

PS: I don't have a Karmic installation (I only have Jaunty and Lucid) so I haven't had a chance to test that the packages even work.

Can you add any kind of logs from when a freeze occurs? Your logs are clean.. Just attaching /var/log/Xorg.0.log.old on the next boot after a freeze would help identifying the problem.

Ok, I started the XServer, put on the second monitor and turned it to extend screen. After the following blank screen I backuped the log file and put it up here :

http://snowborn.de/Xorg.0.log

Hope that helps :)

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.