X windows broken after upgrade (fwd)

[AN]

UPDATE:

Please disregard, rebuilding drm-legacy-kmod, and gpu-firmware-kmod fixed 
the issue.  Sorry for the noise.

Regards

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Hi:

I just updated another box a few minutes ago and after rebooting startx does 
not work.  At r343589 X is now broken, the error I receive is:

(EE)
Fatal server error:
(EE) Cannot run in framebuffer mode. Please specify busIDs  for all framebuffer 
devices

I tried rebuilding mesa and Xorg server but it did not help.

Nothing in the log seems obvious, any help would be really appreciated.

Thanks in advance.