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<body><span class="vcard"><a class="email" href="mailto:lukas@wunner.de" title="Lukas Wunner <lukas@wunner.de>"> <span class="fn">Lukas Wunner</span></a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW - [NV34] failed to idle channel 0xcccc0000 (also NV44A)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70388">bug 70388</a>
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<td>lukas@wunner.de
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [NV34] failed to idle channel 0xcccc0000 (also NV44A)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70388#c37">Comment # 37</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [NV34] failed to idle channel 0xcccc0000 (also NV44A)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70388">bug 70388</a>
from <span class="vcard"><a class="email" href="mailto:lukas@wunner.de" title="Lukas Wunner <lukas@wunner.de>"> <span class="fn">Lukas Wunner</span></a>
</span></b>
<pre>(In reply to Linas Vepstas from <a href="show_bug.cgi?id=70388#c33">comment #33</a>)
<span class="quote">> After this, starting X a second time does not generate any video-out, so
> monitors stay blanked. Nothing at all printed in /var/log/syslog. However
> kern.log shows:
>
> Oct 31 15:41:47 fanny kernel: [ 2761.045902] INFO: task kworker/10:1:135
> blocked for more than 120 seconds.
> Oct 31 15:41:47 fanny kernel: [ 2761.045912] Not tainted
> 3.18.0-rc2-linas #5
> Oct 31 15:41:47 fanny kernel: [ 2761.045915] "echo 0 >
> /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> Oct 31 15:41:47 fanny kernel: [ 2761.045920] kworker/10:1 D
> ffff88085dd53040 0 135 2 0x00000000
> Oct 31 15:41:47 fanny kernel: [ 2761.045959] Workqueue: events
> output_poll_execute [drm_kms_helper]</span >
This hung task issue has been fixed in v4.16-rc3 with
<a href="https://git.kernel.org/linus/d61a5c106351">https://git.kernel.org/linus/d61a5c106351</a>
It is unrelated however to the "failed to idle channel" issue AFAICS.</pre>
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