nouveau broken on kernel-3.17.7-300.fc21.x86_64

[Neal Becker]

Booted up and X dies.

Messages in /var/log/Xorg.0.log.old include

     46:[    20.239] (EE) systemd-logind: failed to get session: PID 954 does 
not belong to any known session
     75:[    20.251] (EE) Failed to load module "nv" (module does not exist, 0)
    114:[    20.255] (EE) [drm] KMS not enabled
    115:[    20.255] (EE) [drm] KMS not enabled
    116:[    20.255] (EE) [drm] KMS not enabled
    117:[    20.255] (EE) [drm] KMS not enabled
    118:[    20.255] (EE) [drm] KMS not enabled
    126:[    20.256] (EE) open /dev/fb0: No such file or directory
    134:[    20.256] (EE) open /dev/fb0: No such file or directory
    137:[    20.257] (EE) Screen 0 deleted because of no matching config 
section.
    139:[    20.257] (EE) Screen 0 deleted because of no matching config 
section.
    142:[    20.257] (EE) Screen 0 deleted because of no matching config 
section.
    144:[    20.257] (EE) Device(s) detected, but none match those in the config 
file.
    145:[    20.257] (EE) 
    147:[    20.257] (EE) no screens found(EE) 

Booted up kernel-3.17.6-300.fc21.x86_64 OK.

-- 
-- Those who don't understand recursion are doomed to repeat it