Wondering.... are the NVidia binary video drivers preventing the screen power save?
I booted a laptop also loaded with 20.04 LTS, which has Intel graphics. That has the same screen saver / power settings. That machine did correctly put the screen to sleep mode... screen saver was not left visible and running.
Wondering.... are the NVidia binary video drivers preventing the screen power save?
I booted a laptop also loaded with 20.04 LTS, which has Intel graphics. That has the same screen saver / power settings. That machine did correctly put the screen to sleep mode... screen saver was not left visible and running.