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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - sna: (Haswell) X-server freezes when enabling DP at docking station"
href="https://bugs.freedesktop.org/show_bug.cgi?id=71267#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - sna: (Haswell) X-server freezes when enabling DP at docking station"
href="https://bugs.freedesktop.org/show_bug.cgi?id=71267">bug 71267</a>
from <span class="vcard"><a class="email" href="mailto:daniel@ffwll.ch" title="Daniel Vetter <daniel@ffwll.ch>"> <span class="fn">Daniel Vetter</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=71267#c4">comment #4</a>)
<span class="quote">> Created <span class=""><a href="attachment.cgi?id=88700" name="attach_88700" title="dmesg 3.11.6 (drm.debug=0xe)">attachment 88700</a> <a href="attachment.cgi?id=88700&action=edit" title="dmesg 3.11.6 (drm.debug=0xe)">[details]</a></span>
> dmesg 3.11.6 (drm.debug=0xe)</span >
There seems to be nothing terrible going wrong leading up to the backtrace. So
looks like a new kind of bug. Can you please recompile with lockdep
(CONFIG_PROVE_LOCKING) enabled and regrab a drm.debug dmesg of the hang? That
should list all the other task hogging the mutex and hopefully shed more light
onto what's going wrong here.</pre>
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