Bug#801298: nvidia-alternative: prevents nouveau driver from loading

[Lars Noschinski]

> I did not explicitly install any nvidia- or opencl-related packages, it
> seems they were pulled in recursively by libhwloc.

To prevent misunderstandings: nvidia-alternative was also installed  
before. I would guess that the last (successful) reboot was with  
340.76-5, although 340.93-1 was installed in between.