@felix @all: already found a bug which sounds just like the problem: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video- intel/+bug/805586
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/761065 Title: [Sandybridge] Spurious "*ERROR* Hangcheck timer elapsed... blt ring idle" messages in dmesg when using compiz To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/761065/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs