Addendum:
apt-file search /usr/lib32/vdpau/libvdpau_nvidia.so.1
returns nothing. But
apt-file find libvdpau_nvidia.so.1
returns
nvidia-304: /usr/lib/nvidia-304/vdpau/libvdpau_nvidia.so.1 nvidia-304-updates: /usr/lib/nvidia-304-updates/vdpau/libvdpau_nvidia.so.1 nvidia-340: /usr/lib/nvidia-340/vdpau/libvdpau_nvidia.so.1 nvidia-340-updates: /usr/lib/nvidia-340-updates/vdpau/libvdpau_nvidia.so.1 nvidia-361: /usr/lib/nvidia-361/vdpau/libvdpau_nvidia.so.1 nvidia-361-updates: /usr/lib/nvidia-361-updates/vdpau/libvdpau_nvidia.so.1
where nvidia-361 is installed on my system. In other words: The path prime-select uses should read "/usr/lib/nvidia-361/vdpau/libvdpau_nvidia.so.1" and not " /usr/lib32/nvidia-361/vdpau/libvdpau_nvidia.so.1".
Addendum:
apt-file search /usr/lib32/ vdpau/libvdpau_ nvidia. so.1
returns nothing. But
apt-file find libvdpau_ nvidia. so.1
returns
nvidia-304: /usr/lib/ nvidia- 304/vdpau/ libvdpau_ nvidia. so.1 nvidia- 304-updates/ vdpau/libvdpau_ nvidia. so.1 nvidia- 340/vdpau/ libvdpau_ nvidia. so.1 nvidia- 340-updates/ vdpau/libvdpau_ nvidia. so.1 nvidia- 361/vdpau/ libvdpau_ nvidia. so.1 nvidia- 361-updates/ vdpau/libvdpau_ nvidia. so.1
nvidia-304-updates: /usr/lib/
nvidia-340: /usr/lib/
nvidia-340-updates: /usr/lib/
nvidia-361: /usr/lib/
nvidia-361-updates: /usr/lib/
where nvidia-361 is installed on my system. In other words: The path prime-select uses should read "/usr/lib/ nvidia- 361/vdpau/ libvdpau_ nvidia. so.1" and not " /usr/lib32/ nvidia- 361/vdpau/ libvdpau_ nvidia. so.1".