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

[Maiku]

I was running into this issue myself, testing something with both
nouveau and the proprietary nvidia driver installed, trying to switch
between them across restarts.

When trying to run nouveau, removing /etc/modprobe.d/nvidia.conf
stopped the nvidia module from automatically being loaded. It also
worked to simply comment out the alias lines from that configuration
file:

alias pci:v000010DEd00000E00sv*sd*bc04sc80i00* nvidia
alias pci:v000010DEd00000AA3sv*sd*bc0Bsc40i00* nvidia
alias pci:v000010DEd*sv*sd*bc03sc02i00* nvidia
alias pci:v000010DEd*sv*sd*bc03sc00i00* nvidia

Judging from the comment just above the alias lines:

# These aliases are defined in *all* nvidia modules.
# Duplicating them here sets higher precedence and ensures the selected
# module gets loaded instead of a random first match if more than one
# version is installed. See #798207.

It seems that having these alias lines here, perhaps sets the priority
above nouveau as well as the legacy proprietary drivers?

-Maiku