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<body><span class="vcard"><a class="email" href="mailto:jinxianx.guo@intel.com" title="Guo Jinxian <jinxianx.guo@intel.com>"> <span class="fn">Guo Jinxian</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BYT]igt/kms_flip/wf_vblank-vs-modeset cause WARNING: CPU: 0 PID: 3716 at drivers/gpu/drm/i915/intel_dp.c:2653 intel_dp_link_down+0x5b/0x18d [i915]()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70570">bug 70570</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEEDINFO
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<td>NEW
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BYT]igt/kms_flip/wf_vblank-vs-modeset cause WARNING: CPU: 0 PID: 3716 at drivers/gpu/drm/i915/intel_dp.c:2653 intel_dp_link_down+0x5b/0x18d [i915]()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70570#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BYT]igt/kms_flip/wf_vblank-vs-modeset cause WARNING: CPU: 0 PID: 3716 at drivers/gpu/drm/i915/intel_dp.c:2653 intel_dp_link_down+0x5b/0x18d [i915]()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70570">bug 70570</a>
from <span class="vcard"><a class="email" href="mailto:jinxianx.guo@intel.com" title="Guo Jinxian <jinxianx.guo@intel.com>"> <span class="fn">Guo Jinxian</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=70570#c1">comment #1</a>)
<span class="quote">> Created <span class=""><a href="attachment.cgi?id=92023" name="attach_92023" title="don't disable DP port during hot unplug">attachment 92023</a> <a href="attachment.cgi?id=92023&action=edit" title="don't disable DP port during hot unplug">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=70570&attachment=92023'>[review]</a> [review]
> don't disable DP port during hot unplug
>
> I hit the same WARN by first unplugging the DP cable and then doing an
> xrandr --off. The problem is that that during the modeset the driver tries
> to disable the already disabled DP port. One solution would be to leave the
> port enabled during the unplug event handling and only disable it during the
> subsequent modeset.
>
> The attach patch does this, could you try it?</span >
This bug still can be reproduce with the patch, please check the dmesg "Call
trace with patch" for details, thanks.</pre>
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