[Bug 90873] GPU hang, TearFree On, Mate desktop environment

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=90873

--- Comment #4 from Tom <neatnoise@gmail.com> ---
(In reply to Michel Dänzer from comment #3)
> (In reply to Tom from comment #0)
> > I experience GPU hang while TearFree option is on.
> 
> Does it hang when you do anything in particular?
> 
> FWIW, this line in dmesg is probably related:
> 
> [  141.232226] radeon 0000:01:00.0: bo ffff8804236d3400 va 0x0000001000
> conflict with (bo ffff88042a018800 0x0000001000 0x0000001563)
> 
> but I'm not sure what would cause that.
> 
> 
> > I've tested TearFree when this feature was introduced in git version of
> > xf86-video-ati-git and I didn't experience GPU hang back then.
> 
> Can you try isolating the xf86-video-ati commit introducing the hang with
> git bisect?

I investigated it a bit. When I start lightdm it starts fine. I've created new
linux user without any desktop config and it desktop env started also ok. Then
I've changed resolution using desktop environment tool and then problem
appeared. The same happened when used xrandr.

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