Comment # 74 on bug 94990 from Karol Herbst

(In reply to Yann Golanski from comment #73)
> (In reply to Karol Herbst from comment #72)
> > By the way, this affects the kernel module only.
> 
> This still stops my machine from booting or X11 from running if I disable
> the Nouveau driver. Or am I being dense and missing something?… ☺

most likely, yes. You should check dmesg in this case and check what is
happening.