Upstream indicates they believe it to be fixed by disabling framebuffer compression and adding this kernel patch (present in linux master):
commit 80e829fade4eea5f07c410df6a551c42e2d0ca9c Author: Daniel Vetter <[email protected]> Date: Sat Mar 31 11:21:57 2012 +0200 drm/i915: implement ColorBlt w/a According to an internal workaround master list, we need to set bit 5 of register 9400 to avoid issues with color blits. Testing shows that this seems to fix the blitter hangs when fbc is enabled on snb, thanks to Chris Wilson for figuring this out. Tested-by: Chris Wilson <[email protected]> Tested-by: Michael "brot" Groh <[email protected]> Acked-by: Ben Widawsky <[email protected]> Signed-Off-by: Daniel Vetter <[email protected]> ** Changed in: linux (Ubuntu) Status: Confirmed => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/981261 Title: [sandybridge-m-gt2] GPU lockup render.IPEHR: 0x78170003 To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/981261/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
