[Bug 153121] UVD not responding, trying to reset the VCPU, ATI Mobility Radeon HD 5650

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=153121

--- Comment #29 from Michel Dänzer <michel at daenzer.net> ---
(In reply to Kontantin Ivanov from comment #28)
> DRI_PRIME=1 glxinfo | grep -i opengl | egrep -i '(version|renderer)'
> 
> OpenGL renderer string: Mesa DRI Intel(R) Ironlake Mobile 

[...]

> DRI_PRIME=1 glxgears
> 
> Running synchronized to the vertical refresh.  The framerate should be
> approximately the same as the monitor refresh rate.
> 8731 frames in 5.0 seconds = 1746.049 FPS

I suspect you just get a higher framerate because DRI_PRIME=1 implicitly
disables sync-to-vblank with DRI2, even when it ends up using the same GPU, and
you'll see with glxgears -info that it's also using the Intel GPU. Presumably
because Xorg couldn't initialize the Radeon GPU.

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