[Bug 94751] Second screen corruption with TearFree and glamor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94751

--- Comment #2 from alex_y_xu at yahoo.ca ---
(In reply to Michel Dänzer from comment #1)
> Created attachment 122630 [details] [review]
> Update pixmap pitch in radeon_set_pixmap_bo
> 
> Does this patch fix the problem? If not, please attach the Xorg log and the
> output of xrandr captured when the problem occurs.

Oh, I forgot to attach Xorg log. I checked xrandr and the output appeared to be
correct. I also did "xrandr --output DVI-1 --off" which turned the monitor off,
then "xrandr --auto DVI-1" which turned it back on with the same issue.

Also, in case it is relevant, the corruption looks similar to blocks of the
previous content displayed on the screen. Also, as far as I can tell, the
cursor works normally when moved over into that monitor (i.e. displayed "on
top" of the corruption), including being Plasma themed. Also, unsurprisingly,
spectacle (KDE screenshot utility) displayed the contents of the monitor
correctly.

> (In reply to alex_y_xu from comment #0)
> > I can bisect if necessary, but it would be somewhat inconvenient.
> 
> Why is that? FWIW, you don't even need to quit your main X session for it.

Hm, I forgot about that. Still, I would have to figure out how the ebuild works
or how to install the driver myself. Not a huge amount of work, but I assumed
you can probably accurately guess the problem.

> > I would prefer a specific commit to checkout or revert to test.
> 
> My guess would be that
> https://cgit.freedesktop.org/xorg/driver/xf86-video-ati/commit/
> ?id=b2b079be0e7ef2704c3df9ee25fe46166e450e83 introduced the problem.

OK, I can test in ~18 hours.

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