[Bug 80008] Random loss of video output, laptop connected via docking station to two external (DVI, VGA) monitors rotated in portrait mode

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80008

--- Comment #11 from ncopa at alpinelinux.org ---
I have very very similar problem with i915 on an old dell optiplex 745 with
ubuntu 14.04.

I found this bug by googling
"/build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_display.c:922"

I can consequently reproduce it by opening 
https://chrome.google.com/webstore/detail/user-agent-switcher-for-c/djflhoibgkdhkhhcedjiklpkjnoahfmg
in google chrome.

I have tested using UXA instead of SNA without that making any difference.

So i googled ubuntu .deb package for newer linux kernels.

3.14.x - no change. same thing happens.
3.16.x - GPU crashes but kernel does not completely die. The window manager
died though.
3.17.x - same as 3.16.

I also found some deb package for xf86-video-intel-2.99.216 + git20141016 but
issue is still there.

I could try build xf86-video-intel from git and do git bisect, but I'd need
some hint where to start from, eg, what would likely be a starting point for
'good'.

I will not bisect kernel though, not on this old box.

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