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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Random loss of video output, laptop connected via docking station to two external (DVI, VGA) monitors rotated in portrait mode"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80008#c11">Comment # 11</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Random loss of video output, laptop connected via docking station to two external (DVI, VGA) monitors rotated in portrait mode"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80008">bug 80008</a>
from <span class="vcard"><a class="email" href="mailto:ncopa@alpinelinux.org" title="ncopa@alpinelinux.org">ncopa@alpinelinux.org</a>
</span></b>
<pre>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
<a href="https://chrome.google.com/webstore/detail/user-agent-switcher-for-c/djflhoibgkdhkhhcedjiklpkjnoahfmg">https://chrome.google.com/webstore/detail/user-agent-switcher-for-c/djflhoibgkdhkhhcedjiklpkjnoahfmg</a>
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.</pre>
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