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<body><span class="vcard"><a class="email" href="mailto:daniel@ffwll.ch" title="Daniel Vetter <daniel@ffwll.ch>"> <span class="fn">Daniel Vetter</span></a>
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<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [C220] Display goes blank with PCH PWM1 enabled warning in intel_display.c:7376/6900"
href="https://bugs.freedesktop.org/show_bug.cgi?id=86105">bug 86105</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>NEW
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<td>NEEDINFO
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [C220] Display goes blank with PCH PWM1 enabled warning in intel_display.c:7376/6900"
href="https://bugs.freedesktop.org/show_bug.cgi?id=86105#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [C220] Display goes blank with PCH PWM1 enabled warning in intel_display.c:7376/6900"
href="https://bugs.freedesktop.org/show_bug.cgi?id=86105">bug 86105</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>Can you please grab the output of the following files:
/sys/module/snd_hda_intel/parameters/power_save
/sys/bus/pci/devices/0000:00:03.0/power/control
/sys/devices/pci0000:00/0000:00:02.0/power/autosuspend_delay_ms
/sys/devices/pci0000:00/0000:00:02.0/power/control
For debugging pls set autosuspend_delay_ms to "0", all control files to "auto"
and power_save to "1" with echo, e.g.
echo "1" > /sys/module/snd_hda_intel/parameters/power_save
If this is indeed a runtime pm bug then the above values should make it a lot
easier to reproduce, which would be a good hint for further debugging.</pre>
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