Even with “Auto-resize Guest Display” enabled and the guest additions installed resizing the screen still does not work. It seems to work in some respect because a large window on boot is filled but resizing later does not work.
Does anybody know what I need to allow on the fly resizing?
I do not have the extensions. The version is 6.1.6. I did install the guest additions using: sudo apt install virtualbox-guest-dkms virtualbox-guest-x11 virtualbox-guest-utils which worked on regular Ubuntu.