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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Tearing with reverse prime (intel primary, nouveau secondary)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103202#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Tearing with reverse prime (intel primary, nouveau secondary)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103202">bug 103202</a>
from <span class="vcard"><a class="email" href="mailto:michel@daenzer.net" title="Michel Dänzer <michel@daenzer.net>"> <span class="fn">Michel Dänzer</span></a>
</span></b>
<pre>(In reply to post+fdo from <a href="show_bug.cgi?id=103202#c3">comment #3</a>)
<span class="quote">> It seems there is some work on getting synchronization to work with PRIME
> <<a href="https://www.x.org/wiki/Events/XDC2016/Program/xdc-2016-prime-sync.pdf">https://www.x.org/wiki/Events/XDC2016/Program/xdc-2016-prime-sync.pdf</a>>; [...]</span >
FWIW, it's possible to avoid tearing between GPUs in a much less complicated
way than that, if the drivers for both GPUs use the ScreenRec::SyncSharedPixmap
hook. You can take a look at xf86-video-amdgpu/ati for an example. (The driver
of the displaying GPU also needs to separately prevent tearing of the scanout
process itself. xf86-video-amdgpu/ati do this by default for PRIME outputs)</pre>
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