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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - gamma adjustments cause stuttering with amdgpu.dc=1, especially problematic with RedShift etc."
href="https://bugs.freedesktop.org/show_bug.cgi?id=108917#c9">Comment # 9</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - gamma adjustments cause stuttering with amdgpu.dc=1, especially problematic with RedShift etc."
href="https://bugs.freedesktop.org/show_bug.cgi?id=108917">bug 108917</a>
from <span class="vcard"><a class="email" href="mailto:nicholas.kazlauskas@amd.com" title="Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>"> <span class="fn">Nicholas Kazlauskas</span></a>
</span></b>
<pre>(In reply to tempel.julian from <a href="show_bug.cgi?id=108917#c8">comment #8</a>)
<span class="quote">> Unfortunately, Linux 5.0.3 with
>
> drm: Block fb changes for async plane updates
> commit 25dc194b34dd5919dd07b8873ee338182e15df9d
>
> hasn't changed the situation, as far as I can tell. :(</span >
That's the DRM level bugfix for use after free on async updates for plane
framebuffer swaps. It actually hurts performance rather than helps it.
There's a fix that allows framebuffer swaps again being developed right now
with some patches in dri-devel:
<a href="https://patchwork.freedesktop.org/series/57524/">https://patchwork.freedesktop.org/series/57524/</a>
You'd have to revert
"drm/amd/display: Skip fast cursor updates for fb changes"
as well though to actually allow this series to work.</pre>
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