gpu-manager fails to unload NVIDIA modules

[Florian Reisenhofer]

I am using Ubuntu 16.04.1 LTS on a Clevo P65XSE-A with a Intel HD 5500 (I think!?) and a GTX 970m

When using a new NVIDIA driver from the graphics ppa
https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa

I noticed when switching back to the Intel card via "sudo prime-select intel", the NVIDIA card stays on.
When launching gpu-manager via terminal it tells me it can't unload nvidia_modeset and nvidia_drm modules.

Should probably use libkmod2 like bumblebee
https://github.com/Bumblebee-Project/Bumblebee/pull/762

Unloading nvidia-uvm with "no" parameters
rmmod: ERROR: Module nvidia_uvm is not currently loaded
Unloading nvidia-modeset with "no" parameters
rmmod: ERROR: Module nvidia_modeset is in use by: nvidia_drm
Unloading nvidia with "no" parameters
rmmod: ERROR: Module nvidia is in use by: nvidia_modeset

[Florian Reisenhofer (anti-ultimate)]

Can someone please reply? This is very easy to fix, you just need to be sure nvidia_drm is also unloaded.

In the future, NVIDIA may add new modules however that will break this again - so it needs a better solution. The OP contains a way the bumblebee project has dealt with this issue.

[Alberto Milone (albertomilone)]

I can see how this can be a problem with recent nvidia drivers. I am going to take care of this soon.

I will also look into libkmod2. Thanks