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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Random black screens for 1/2 second to 1 second when using HDMI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94867#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Random black screens for 1/2 second to 1 second when using HDMI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94867">bug 94867</a>
from <span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span></b>
<pre>(In reply to SmallwoodDR82 from <a href="show_bug.cgi?id=94867#c0">comment #0</a>)
<span class="quote">> Attaching dmesg with drm.debug=0xe enabled.</span >
Please attach dmesg all the way from boot to reproducing the problem, use
log_buf_len=4M or similar as necessary. There's a couple of underruns in the
logs, but it's not conclusive that this is the root cause for the issue you're
experiencing.
FIFO[ 4.557470] [drm:audio_config_hdmi_pixel_clock] Configuring HDMI audio
for pixel clock 148500 (0x00090000)\
[ 4.558114] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder A\
[ 4.558117] [drm:cpt_irq_handler] *ERROR* PCH transcoder A FIFO underrun\</pre>
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