Comment # 1 on bug 1089116 from Michal Srb

The crash looks the same as in bug #1068961. The fbdev and modesetting drivers
do not play well together since each is trying to use different version of
randr.

However, the fbdev driver should not be used at all. Either nvidia proprietary
driver or nouveau should be used for the nvidia driver. It seems that you do
not have the nvidia driver installed, so X server tries to use nouveau, but
that fails. The Xorg log shows this error:

> [    80.829] (EE) [drm] Failed to open DRM device for pci:0000:01:00.0: -19
> ...
> [    80.832] (**) FBDEV(0): claimed PCI slot 1@0:0:0

Is nouveau kernel module loaded? Please attach also the output of dmesg.