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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [ILK] Sporadic FIFO underruns"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101012#c8">Comment # 8</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [ILK] Sporadic FIFO underruns"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101012">bug 101012</a>
from <span class="vcard"><a class="email" href="mailto:public@timruffing.de" title="public@timruffing.de">public@timruffing.de</a>
</span></b>
<pre>I suspect I see the same bug on a Thinkpad T570, newest firmware 1.23..
The glitches are pretty rate, at most a few time a day if at all. Today I
noticed [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A
FIFO underrun. I guess I haven't checked dmesg earlier.
On AC power and with a second display, the bug appears basically never. I think
I observed it once but I cannot tell for sure whether it was on AC, second
display or once.
I'll try adding drm.debug=0xe.</pre>
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