I'm running Ubuntu Desktop 18.04/20.04 LTS as a guest in Virtualbox on a Windows 10 host with multiple physical screens connected to the host. Every time I boot the Ubuntu VM it comes to a black screen, i.e. no feedback. However, if I type the password and press Enter it logs in and shows the Desktop as normal. I suspect it might be a graphics issue.
Any idea what to do?
Best Answer
So as i've suspected that it's a graphics issue, I went into the settings, first thinking it's a drivers issue, since many other posters of slightly different questions have had solutions with changing the drivers/controllers (or even CPU architecture etc). The other thought I had that might be the problem is that i'm running multiple screens on the host. Perhaps the guest VM is struggling to connect with them.
What worked for me was to:
Monitor Count
(which then indicated an error that the "settings are invalid"), which made me think of tinkering with theVideo Memory
.Video Memory
to 64MB (it was 16MB initially)