- Firefox is unbearably slow and is consuming 100% CPU, I can barely type this post
- games are running at slide show speed
- GUI is noticeable slow(ish), too
Solved. By adding
Section "Files"
ModulePath "/usr/lib/nvidia/xorg"
ModulePath "/usr/lib/xorg/modules"
EndSection
to /etc/X11/mhwd.d/nvidia.conf
(the problem was loading the “wrong” libglx.so
with llvmpipe as a renderer) (as suggested in this Ubuntu thread)
More experienced forum members: please help me to improve this post.