https://bugs.freedesktop.org/show_bug.cgi?id=39222
--- Comment #5 from Andy Furniss lists@andyfurniss.entadsl.com 2011-07-14 09:38:28 PDT --- (In reply to comment #3)
Oh, I didn't know only mpeg12 was available for now, sorry. I'm going to try it with a sample mpeg2 clip.
Not sure why vdpauinfo doesn't work either... I just tested with latest libdrm from git on 2.6.39.
I would make distclean and rebuild mesa.
If it still doesn't work try
ldd /usr/lib/vdpau/libvdpau_r600.so
to see which libdrm.so.2 is being used eg. it may be an old one on a different path.