I've just experienced this for the first time in Ubuntu 20.04 official release. I did a fresh install of 20.04 on a system I had been running 19.10 on without ever experiencing this issue. I am running the proprietary NVidia driver with a GT 1030 card, not using the built-in graphics in my Celeron 4900.
Driver Info: NVIDIA-SMI 440.64
Note that I have never experienced this with my main system (Ryzen 3600X with GT 710 card) running 18.04, also with the NVidia driver and running the HWE kernel.
I've just experienced this for the first time in Ubuntu 20.04 official release. I did a fresh install of 20.04 on a system I had been running 19.10 on without ever experiencing this issue. I am running the proprietary NVidia driver with a GT 1030 card, not using the built-in graphics in my Celeron 4900.
Driver Info: NVIDIA-SMI 440.64
Note that I have never experienced this with my main system (Ryzen 3600X with GT 710 card) running 18.04, also with the NVidia driver and running the HWE kernel.