Hopefully I've identified the correct issue:
commit 9a66d77efa53cff83e9711786c39e8ebff8dd26d Author: Chris Wilson <[email protected]> Date: Tue Sep 10 12:29:24 2013 +0100 sna: Disable use of Y-tiling for gen4 This problematic GPU still seems to like to fallover when faced with Y-tiling. It was reserved only for use with glyphs, but even that occasionally runs into trouble, so disable all selection of Y-tiling for our own use. Bugzilla: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1222203 Signed-off-by: Chris Wilson <[email protected]> ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: In Progress => Fix Committed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1222203 Title: [gm45] False GPU lockup IPEHR: 0x02000004 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1222203/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
