[Bug 94220] AccelMethod "none" breaks DRI2 and VDPAU on amdgpu

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Feb 22 06:59:53 UTC 2016


--- Comment #2 from Michel Dänzer <michel at daenzer.net> ---
(In reply to Andy Furniss from comment #1)
> Using Xserver 1.18.1 + git amsgpu I don't get the fails.
> It's really slow, though. 
> glxgears apparently using h/w (says synced to refresh) but 12 fps, vdpau
> about 1 fps.

That's because of

(In reply to csaba.halasz from comment #0)
> "Setting this option to none disables use of the glamor acceleration
> architecture. In that case, all 2D rendering is done by the CPU, [...]

"All 2D rendering" includes the copies for DRI2SwapBuffers, used for GLX buffer
swaps and VDPAU presentation.

Generally, this option is only intended for bringing up a 3D driver, not for
normal usage. So the bad news is that fixing this problem has very low
priority, but the good news is that you're not really missing anything. :)

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