@Dmitrijs: To find which method is being used, do:

grep AccelMethod /var/log/Xorg.0.log

I find also that the titlebars of non-focused windows are often light
grey instead of black when using SNA.

And to change methods, put this in your xorg.conf to set the
acceleration method and then restart X:

Section "Device"
        Identifier      "Card0"
        Driver          "intel"
        Option          "AccelMethod" "sna"  # or uxa, as appropriate
EndSection

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1041790

Title:
  [sandybridge-m-gt2] GPU lockup  IPEHR: 0x0b160001 IPEHR: 0x0b140001

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