So... I have read others experienced the "blank white screen" issue previously. I am not sure what their initiation of the error was, but I believe I have found a "new" one...
I just updated to Ubuntu 20.04, and R v4.0. Everything was running fine, e.g. me updating my packages from 3.6.x, but when I updated my driver to 'see' my GPU, RStudio went into "blank white screen" mode. I tried resetting the state numerous times. I tried removing, purging, rebooting, etc, but still, blank white screen. I doesn't happen immediately, but for all purposes, as soon as you select something, e.g. a script to load, a project to load, or even a simple item like trying to arrange the panes... FLASH, and all goes white.
So, I am not sure what caused others' "white screens of death," but for the moment, i believe the combination Ubuntu 20.04, Rv4.0, and a GPU selection...
What thoughts does the community have?
BTW, before I selected the GPU, packages appeared to be updating, so I really think it's a "graphic" issue...