Bug#672972: Wheezy: VLC player can't play videos

Michel Dänzer daenzer at debian.org
Wed Feb 6 02:18:19 PST 2013

On Die, 2013-02-05 at 21:13 +0200, Rémi Denis-Courmont wrote: 
> In absence of XVideo adapter, VLC will fall back to OpenGL. If OpenGL fails 
> too, VLC will fall back to plain X11.
> The fact that a few frames are shown proves that VLC is NOT trying to use a 
> non-existent XVideo. There would be no frames at all then.

Makes sense.

> The fact that it works just fine when plain X11 output is forced in the 
> preferences proves that X11 would work fine, but is not attempted with default 
> settings.
> In other words, the problem lies with the OpenGL drivers. I have a similar 
> problem on a laptop also with AMD/ATI chip (although mine has XVideo working 
> fine so hardly a problem). This apparent regression is probably due to VLC 
> using shaders for YUV color space conversion since version 2.0.0.
> I doubt VLC is at fault here, and I fail to see what else it could do. If 
> shaders are so slow, the driver should not offer them in the first place.

Why do you think the problem is that 'shaders are slow'?

Without knowing where VLC is hanging, and/or at least seeing the output
of glxinfo, don't expect any progress solving this problem.

Earthling Michel Dänzer           |                   http://www.amd.com
Libre software enthusiast         |          Debian, X and DRI developer

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