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<body><span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BYT] internal display unusable if second display is connected, port not ready error"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80532">bug 80532</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>REOPENED
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<td>NEEDINFO
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BYT] internal display unusable if second display is connected, port not ready error"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80532#c11">Comment # 11</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BYT] internal display unusable if second display is connected, port not ready error"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80532">bug 80532</a>
from <span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span></b>
<pre>(In reply to fcbug from <a href="show_bug.cgi?id=80532#c10">comment #10</a>)
<span class="quote">> This bug is worse since kernel 3.18.5.
>
> The system is unusable without an external monitor.
> The internal monitor stays black and switching to a tty seems to be
> impossible.</span >
I'm confused, let's verify some things.
Plugging in an external display brings black screen to internal screen. This is
the bug, right?
Please provide a fresh dmesg with drm.debug=14 module parameter set for 3.18.5,
or preferrably later kernel, reproducing the problem.
Does it make a difference if the external screen is already plugged at boot vs.
plugged later on?
Does the internal display work all right if *no* other displays are connected?</pre>
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