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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Video cutout on Kaby Lake U processors."
href="https://bugs.freedesktop.org/show_bug.cgi?id=107543#c30">Comment # 30</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Video cutout on Kaby Lake U processors."
href="https://bugs.freedesktop.org/show_bug.cgi?id=107543">bug 107543</a>
from <span class="vcard"><a class="email" href="mailto:phil.smith@adder.com" title="phil.smith@adder.com">phil.smith@adder.com</a>
</span></b>
<pre><span class="quote">> Is only second monitor going blank or both the monitors are going blank?</span >
>From one of our developers:
My i3 board had a single underrun error on both pipe A and pipe B over the
weekend. I had rebooted it on Thursday after removing the command line settings
for i915.enable_psr and i915.enable_fbc. There was another burst of pipe A
errors when I turned on one of the monitors this morning. Both displayport
outputs have stopped working.
[200443.554941] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] ERROR CPU pipe
A FIFO underrun
[200443.555026] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] ERROR CPU pipe
B FIFO underrun
: : :
[319240.880577] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] ERROR CPU pipe
A FIFO underrun
[319262.015158] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] ERROR CPU pipe
A FIFO underrun
[319281.949569] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] ERROR CPU pipe
A FIFO underrun
[319301.884045] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] ERROR CPU pipe
A FIFO underrun
[319321.835242] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] ERROR CPU pipe
A FIFO underrun
[319341.769694] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] ERROR CPU pipe
A FIFO underrun</pre>
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