One random freeze could be:
commit 0920a48719f1ceefc909387a64f97563848c7854
Author: Stéphane Marchesin <marc...@chromium.org>
Date: Tue Jan 29 19:41:59 2013 -0800
drm/i915: Increase the RC6p threshold.
This increases GEN6_RC6p_THRESHOLD from 100000 to 150000. For some
reason this avoids the gen6_gt_check_fifodbg.isra warnings and
associated GPU lockups, which makes my ivy bridge machine stable.
That kernel is available in ppa:mainline under drm-intel-nightly.
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which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1137817
Title:
[ivb] System freeze after high memory usage
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