I'm not sure if this is related, but I can still reproduce a GPU hang (which 
results in no graphics acceleration and a lot of "intel_do_flush_locked failed: 
Input/Output error" messages terminating programs) by running cairo-dock in 
direct OpenGL mode (indirect works fine...).
However, a lot of other things that would previously cause this crash (high GPU 
load, cairo-dock in indirect-rendering, Google Gravity demo running in Firefox, 
...) now work fine. :-)

Attachments:
i915_*.tar.gz: The files from /debug/dri/\1/*
dmesg.log: dmesg output

** Attachment added: "dmesg.log"
   
https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1119793/+attachment/3697932/+files/dmesg.log

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https://bugs.launchpad.net/bugs/1119793

Title:
  [arrandale mesa] GPU lockup  IPEHR: 0x02000000

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