HI,
I have a arch distro linux with currently kernel 4.7.2-1-ARCH on laptop and desktop and last blender 2.77a-6.
On dekstop i have a gtx-750 nvidia GPU card and a processor intel i7 with graphic ability.
On laptop, i have a gtx-950M GPU with a proc intel i7 with same graphic ability (lspci show me the same intel graphic proc inside)
I want to make running blender and render calculs on GPU nvidia, and in the same time stay print on screens (have 2 screens) by the intel graphic proc…
ok, i install all nvidia proprio drivers and bumblebee and xf86-video-intel and cuda toolkit and… all that needed.
Then try test bumblebee with optirun glxgears -info (see my GPU card running, all seems to be ok).
then check again modules lspci -k and lsmod | grep nvidia, etc… all is fine.
optirun blender
(blender open… fine) 
go through file->user preferences (good)
clic on tab “system” for see/select my GPU
blender crash when i clicked on “system” tab… :o
here is my /tmp/blender.crash.txt file:
https://ptpb.pw/TYb8
this is from my desktop
from my laptop, it is exactly the same problem and the same errors (but i can provide the error text also, tell me)
may i forget something somewhere ?
is it a bug who will probably been fixed soon ?
what i can provide for information for find an help to fix this issue ?
thank you.