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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BSW] External HDMI monitor suddenly shows solid color when playing Youtube video at 1080p [fifo underrun]"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97965#c37">Comment # 37</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BSW] External HDMI monitor suddenly shows solid color when playing Youtube video at 1080p [fifo underrun]"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97965">bug 97965</a>
from <span class="vcard"><a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> <span class="fn">Ville Syrjala</span></a>
</span></b>
<pre>(In reply to Yu Kang Ku from <a href="show_bug.cgi?id=97965#c36">comment #36</a>)
<span class="quote">> (In reply to Ville Syrjala from <a href="show_bug.cgi?id=97965#c33">comment #33</a>)
> > So what might be interesting is checking if we can reproduce the issue when
> > driving HDMI out of port B with pipe A or B. Thus far you've just driven
> > HDMI with port D/pipe C, no?
>
> That's correct. So far, we've been using port D/pipe C exclusively.
>
> > Assuming a standard RVP setup you would just need any old DP++ DP->HDMI
> > dongle/cable and hook it up to the DP port instead of using the HDMI port on
> > board.
>
> I ran the new experiment exactly as you described, using a DP->HDMI cable.
> Unfortunately, the problem is still reproducible. The output of
> intel_watermark is here:
> <a href="https://bugs.freedesktop.org/attachment.cgi?id=127557">https://bugs.freedesktop.org/attachment.cgi?id=127557</a>. The output of
> "intel_reg dump --all" is here:
> <a href="https://bugs.freedesktop.org/attachment.cgi?id=127558">https://bugs.freedesktop.org/attachment.cgi?id=127558</a>.
>
> These captured outputs will show that the new experiment is using port
> B/pipe B.
>
> Just for the record, the experiment was done on a BSW RVP using
> drm-intel-nightly without any of the changes that you've previously
> recommended.</span >
Can we repeat the failure with, say, only pipe B active + DDR DVFS disabled +
PM5 disabled + cxsr/maxfifo disabled + trickle feed enabled?</pre>
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