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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [gen4 drm] stuck on render ring - PLL state assertion failure (3.13)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89179#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [gen4 drm] stuck on render ring - PLL state assertion failure (3.13)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89179">bug 89179</a>
from <span class="vcard"><a class="email" href="mailto:przanoni@gmail.com" title="Paulo Zanoni <przanoni@gmail.com>"> <span class="fn">Paulo Zanoni</span></a>
</span></b>
<pre>(In reply to Maruthi Seshidhar from <a href="show_bug.cgi?id=89179#c4">comment #4</a>)
<span class="quote">> The sysfs file /sys/class/drm/card0/error is an empty file after reboot.</span >
Yes, that's expected.
<span class="quote">>
> Any pointers on how to collect the said file?</span >
After the error happens, can you use another machine to SSH to the bugged
machine and collect the file?
You could also use some crazy strategies, like run a script that tries to copy
/sys/class/drm/card0/error to ~/error-$(date "+%H-%M").txt every minute, and
then when the hang happens you wait at least a minute, reboot the machine and
check the most recent non-empty files :)</pre>
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