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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BDW] Pipe A FIFO underrun errors with a 4k display"
href="https://bugs.freedesktop.org/show_bug.cgi?id=83497#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BDW] Pipe A FIFO underrun errors with a 4k display"
href="https://bugs.freedesktop.org/show_bug.cgi?id=83497">bug 83497</a>
from <span class="vcard"><a class="email" href="mailto:damien.lespiau@gmail.com" title="Damien Lespiau <damien.lespiau@gmail.com>"> <span class="fn">Damien Lespiau</span></a>
</span></b>
<pre>Huuum, a bit of a shot in the dark, but what happens if you boot with
i915.enable_ips=0. There's a known corruption case with IPS when dotclock > 95%
cdclock (which can happen here as you have an eDP 4k display, so IPS should be
running)
I wouldn't expect an underrun here given the description of the IPS problem we
have, but it's an easy thing to try.</pre>
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