You do not appear to be using the NVIDIA X driver
56700
How to re-enable a previously installed Nvidia Driver
132441
Can I use CUDA with a non-NVIDIA GPU?
123826
How to install Nvidia GT 840M graphics driver in Ubuntu 14.04
26803
How can I find what video driver is in use on my system?
28403
How do I install nVidia graphics drivers from “X-Swat” ppa?
154509
Remove nVidia driver and go back to Nouveau
107747
"No X11 DISPLAY variable" - what does it mean?
112875
Why is there a NVIDIA logo in the [GPU] and [GPGPU] tags?
65363
how to check if nvidia or intel graphics is being used
39701
How can I switch back to Nvidia card from Intel with Nvidia-prime
82783
Nvidia driver doesn't work in 12.10
129179
No CUDA and GPU option
96899
How to install drivers for NVIDIA GeForce FX 5200 on Precise
144012
How do I know which NVIDIA driver I need?
110918
Nvidia X server - cannot switch to GPU from my Intel, because of python import error
11310
How to enable GPU rendering on older Nvidia GPUs?
14814
Installing nvidia drivers on 18.04