Comment # 3 on bug 911219 from Bruno Friedmann

@Stefan just tried with a rebuild of X11:nvidia (locally of course) with
updated 340.76 and it works now without dmesg warning

[   39.390116] nvidia_uvm: Unregistered the UVM driver
[   39.390922] [drm] Module unloaded
[   39.503955] vgaarb: device changed decodes:
PCI:0000:01:00.0,olddecodes=none,decodes=none:owns=io+mem
[   39.504318] [drm] Initialized nvidia-drm 0.0.0 20150116 for 0000:01:00.0 on
minor 0
[   39.504329] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  340.76  Thu Jan
22 12:11:08 PST 2015
[   39.508000] nvidia_uvm: Loaded the UVM driver, major device number 247
[   39.555353] nvidia 0000:01:00.0: irq 39 for MSI/MSI-X


tested on up to date Xorg + Kernel 3.18.5