As far as I can tell this problem seems to be fixed with the new intel
driver.
xserver-xorg-video-intel:
Installiert: 2:2.19.0-0ubuntu1~xup1
Kandidat: 2:2.19.0-0ubuntu1~xup1
Versionstabelle:
*** 2:2.19.0-0ubuntu1~xup1 0
500 http://ppa.launchpad.net/ubuntu-x-swat/x-updates/ubuntu/
precise/main amd64 Packages
100 /var/lib/dpkg/status
2:2.17.0-1ubuntu4 0
500 http://archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
With the default packages in ubuntu precise I still had failing vblank
counters in my Xorg.0.log
If you take a look at the release notes[1] you can see the following line.
- Prevent waiting on scanlines whilst not in control of the VT and therefore
whilst referencing foreign CRTC configurations.
To my mind this may have solved the problem.
I hope this information is helpful for the others that have this issue.
––––––––––––––––––
[1]
http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/plain/NEWS?id=444da84c47266bcbbdf5121507901de8eb36f11b
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https://bugs.launchpad.net/bugs/868684
Title:
vblank counter failed - screen hung
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