*** This bug is a duplicate of bug 1157678 ***
https://bugs.launchpad.net/bugs/1157678
Thank you very much, the newest xorg-intel 2:2.21.6-0ubuntu4 fixes the
issue for me. Thanks again :)
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Proof that SNA was enabled during previous Xorg start:
$ sudo grep SNA Xorg.*
Xorg.0.log.old:[ 461.127] (II) intel(0): SNA compiled:
xserver-xorg-video-intel 2:2.21.6-0ubuntu3 (Bryce Harrington br...@ubuntu.com)
Xorg.0.log.old:[ 461.549] (II) intel(0): SNA initialized with Ironlake backend
Xorg logs
** Attachment added: Xorg.0.log
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1170225/+attachment/3647213/+files/Xorg.0.log
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https://bugs.launchpad.net/bugs/1170225
Xorg SNA log
** Attachment added: Xorg.0.log.old
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1170225/+attachment/3647214/+files/Xorg.0.log.old
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Note that the issue manifested three times out of three docking station
detachments.
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https://bugs.launchpad.net/bugs/1170225
Title:
Intel SNA garbled screen when detaching from the
** Package changed: xorg (Ubuntu) = xserver-xorg-video-intel (Ubuntu)
** Tags added: corruption
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https://bugs.launchpad.net/bugs/1170225
Title:
Intel SNA garbled screen when detaching
*** This bug is a duplicate of bug 1157678 ***
https://bugs.launchpad.net/bugs/1157678
The bug here is a pageflipping vs modesetting race in the kernel.
** This bug has been marked a duplicate of bug 1157678
[ffe] unplugging an external monitor from laptop results in corrupted
screen.
