I followed jsalisbury's instructions and upgraded my kernel. The Ubuntu stock kernel, 3.2.0-30, definitely exhibited the behavior describe above. According to [1] that kernel is based on mainline 3.2.27.
I upgraded to 3.2.28-030228, and it seemed better. Instead of crashing within 12 hours, I managed an uptime of several days, and even then I had to stress test the system to force it to crash. (I played 4 YouTube videos using Flash in Firefox, and played 4 videos in VLC simultaneously. Then I repeatedly clicked on the Firefox and VLC icons in the dash, to zoom out and show all application windows. It took about 5 minutes of this to freeze the system.) I looked at the changelog for 3.2.28[2], and the only changes related to graphics appear to be Intel and Radeon specific. This machine has a Core 2 Duo and an Nvidia discrete GPU, using the Nouveau drivers. I updated the bug description by logging into the machine via SSH and running "sudo apport-collect 1008266". So the bug still exists in the latest 3.2 kernel, now I'm off to try the latest stable kernel (3.5.3-030503). Of course, I have no idea whether the bug is even in the kernel, but I'll find out eventually. [1] http://kernel.ubuntu.com/~kernel-ppa/info/kernel-version-map.html [2] http://thread.gmane.org/gmane.linux.kernel/1346272 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1008266 Title: X freezes several times a day To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1008266/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs