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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [i915, Surface Pro 4] Regression: No display port output in kernel 4.8"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97991#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [i915, Surface Pro 4] Regression: No display port output in kernel 4.8"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97991">bug 97991</a>
from <span class="vcard"><a class="email" href="mailto:mikael@djurfeldt.com" title="Mikael Djurfeldt <mikael@djurfeldt.com>"> <span class="fn">Mikael Djurfeldt</span></a>
</span></b>
<pre>git bisect gives fce91f2 which is about guc.
I then realized that I had the following line in my i915.conf:
options i915 enable_guc_submission=Y guc_log_level=3
When I remove these options, the display port output starts to work also for
later kernels, such as 4.8.0-rc8, i.e. the problem disappears.
But this is still a bug, right? It seems strange that DP output disappears just
because guc is enabled.</pre>
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