I also has the same problem with ubuntu kernel 3.5.0-27, the previous
version 3.5.0-21 worked fine. My laptop is a Dell Latitude 5420 with
sandy bridge chipset and Intel HD3000 VGA. GPU hangs happens once in
awhile, after doing some git bisecting, I found that this patch seems to
be the cause for the problem:
drm/i915: GFX_MODE Flush TLB Invalidate Mode must be '1' for scanline
waits
Includes is my git bisect log.
** Attachment added: "git_bisect.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1162516/+attachment/3648423/+files/git_bisect.log
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https://bugs.launchpad.net/bugs/1162516
Title:
GPU hangs using UEFI 12.10 Secure remix 64 BIT
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