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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - FIFO underrun, visual glitches and instability with dual monitors"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109376#c15">Comment # 15</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - FIFO underrun, visual glitches and instability with dual monitors"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109376">bug 109376</a>
from <span class="vcard"><a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> <span class="fn">Lakshmi</span></a>
</span></b>
<pre>(In reply to Ville Syrjala from <a href="show_bug.cgi?id=109376#c7">comment #7</a>)
<span class="quote">> We seem to have fixed the original issue so I'm tempted to just close this
> bug.
>
> However it might be interesting to know whether 4.19 and 4.20 are also
> affected. 4.18 is a lost cause since it's no longer maintained, but we might
> want to backport some of the fixes to 4.19 and 4.20. Can you test with
> 4.19/4.20?
>
> In relation to <a class="bz_bug_link
bz_status_CLOSED bz_closed"
title="CLOSED FIXED - [WHL] FIFO underruns on a hybrid machine but only while on "performance" (dGPU) mode"
href="show_bug.cgi?id=109248">bug 109248</a> Canonical identified commit ff43bc379e16
> ("drm/i915: Move ddb/wm programming into plane update/disable hooks on
> skl+") as fixing their flickering screen problems. We might be after the
> same thing here.</span >
Ville, We have results from Kernel 4.20 and issue is reproducible. But we do
not have results yet from 4.19. Should we wait for 4.19 results before we close
this bug?</pre>
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