I think I'm seeing the same, typically (but not always) I get this when attempting to edit gradients in inkscape, I'll also attach a Xorg.log of when this last happened and the end of syslog
** Attachment added: "Xorg.0.log" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/642825/+attachment/1860108/+files/Xorg.0.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/642825 Title: [i915] Maverick GPU hang when using many 3d effects -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs