I'm seeing the same messages since I upgraded to quantal yesterday (upgraded from precise). However there are a few differences in my setup compared to Perseid (the initiator of this bug). So, I'm hesitating to mark it as a "me2".
Major differences are: * my own kernel based on 3.7.1 (which I had before with precise) * Chipset: G73 (NV4B), Family : NV40 If you would force me to draw a conclusion, I'd say it is the xserver- xorg-video-nouveau driver that triggers the bug. And it might be a bug in the nouveau kernel driver that wasn't discovered before. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1072403 Title: Unity and GnomeShell hang or crash with nouveau kernel error messages "fail ttm_validate", "validate vram_list" and "validate: -12" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1072403/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs