(In reply to Arthur Marsh from comment #31)
> Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object
> file: No such file or directory
> [vo/vdpau] Error when calling vdp_device_create_x11: 1
> Error opening/initializing the selected video_out (-vo) device.
> Video: no video
> 
> Ironically I was getting that message, even though I've only had Radeon
> hardware in this machine.

I guess the Xorg radeon driver couldn't initialize hardware acceleration, so it
didn't advertise the VDPAU driver name, and libvdpau fell back to its hardcoded
default 'nvidia'.

As for the hangs, I suspect they just happen randomly regardless of kernel
version. Attaching even more dmesg files just clutters up this report and makes
it harder for anyone to make sense of it.