Thanks for not getting dragged down in my stupidity. I spent some more
time on this, and haven't figured out how I did something so dumb, but I
was missing vmwgfx.ko because I was missing the linux-modules-extras
package for -29 and -31. With that in place, all's well. Sorry for the
noise, just
Apologies if this is completely irrelevant, but I've also started
experiencing a black screen after login on Focal. This is in a
VirtualBox VM using the VMSVGA driver, so absolutely no Nvidia
involvement (Intel HD4600 on the host). After setting the GDM debug
option, I also see the failure to jump
