Is this a note book with Intel+NVIDIA GPU??? If so may be an Optimus based system. If so then you need bumblebee or if you can disable the Intel GPU in the BIOS
My bad, it is a Intel+Nvidia Notebook, and I was using bumblebee but now I’ve moved to suse_prime + bbswitch (btw it seems to be working nice), also I tried this when I had bumbleebee however the intel xorg conf was like this at the time:
However I had the same exact error.
BTW, I don’t know whether this will help or not,but with the Intel GPU I get this when asking for GL_VENDOR
➜ ~ env DRI_PRIME=0 glxgears -info | grep "GL_VENDOR"
GL_VENDOR = Intel Open Source Technology Center
also, I know the Nvidia GPU is not in use (my laptop’s led changes color when the Nvidia GPU is activated), and also I get the Nvidia one when I change to Nvidia GPU.