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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - GPU HANG: ecode -1:0x00000000, reason: Command parser error, iir 0x00008000, action: continue"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80639#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - GPU HANG: ecode -1:0x00000000, reason: Command parser error, iir 0x00008000, action: continue"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80639">bug 80639</a>
from <span class="vcard"><a class="email" href="mailto:ralph@plawetzki.net" title="Ralph Plawetzki <ralph@plawetzki.net>"> <span class="fn">Ralph Plawetzki</span></a>
</span></b>
<pre>I did some more investigation and upgraded to the latest packages again
(intel-dri-10.2.2-1 linux-3.15.2-1 mesa-10.2.2-1 mesa-libgl-10.2.2-1
xf86-video-intel-2.99.912-1) which reproduces the issue and makes the display
stay dark.
Then I only downgraded the kernel (3.15.2-1 => 3.14.5-1) and voilà: the system
boots fine.
So the actual problem seems to be in the kernel, not in one of these:
intel-dri-10.2.2-1 mesa-10.2.2-1 mesa-libgl-10.2.2-1
xf86-video-intel-2.99.912-1</pre>
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