https://bugs.freedesktop.org/show_bug.cgi?id=88152
--- Comment #31 from Arthur Marsh arthur.marsh@internode.on.net --- after last lock-up, although I could restart kdm, vdpau didn't work until I'd powered off and restarted the machine (vdpau failed even after a kexec restart):
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.