Re: Problems with radeon driver under KDE-4.7.2

[ Moving to the mesa-dev mailing list ]

On Son, 2011-11-27 at 15:15 +0100, Hendrik Sattler wrote: 

I just upgraded to KDE-4.7.2 and Linux-3.1 and mostly when using Firefox, I 
get issues like a stall screen, then a short blank screen and then it works 
some time until that happens again.

The kernel log then shows something like:
WARNING: at drivers/gpu/drm/radeon/radeon_fence.c:267 
radeon_fence_wait+0x215/0x292()
Hardware name: TravelMate 6592
GPU lockup (waiting for 0x00158B0E last fence id 0x00158B0C)

[...] 

So far, I think it's great that it can recover pretty fine most of the time 
:-)
I now upgraded to Linux-3.1.3 and looked at the KDE setting about the possible
cause for this. New to me was the desktop effect setting about using 
"OpenGL-2-Shader". I deactivated it and its stable so far. Is this a know 
issue?

Not that I know of. Which version of which Mesa driver are you using?
The output of glxinfo would be interesting.

One other question: I saw that vdpau seems to be supported:
[    24.226] (II) RADEON(0): [DRI2]   VDPAU driver: r600
What exactly is needed to use this? I tried "mplayer -vo vdpau" but that only 
gives me:
Failed to open VDPAU backend libvdpau_r600.so: cannot open shared object file: 
No such file or directory
[vdpau] Error when calling vdp_device_create_x11: 1
Error opening/initializing the selected video_out (-vo) device.

Where can I get this file. Latest Debian does not seem to have it...

You need to build Mesa Git with at least --enable-vdpau. But note that
it's still rather experimental and may not be useful to you, e.g. it can
only decode MPEG 1/2 with the help of GPU shaders so far.


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