If the “Auto-resize Guest Display” is greyed out for you, go ahead and reboot your virtual machine and check if the issue is resolved. In case that doesn’t work, go ahead and restart your VirtualBox.

I am having a difficult time getting VM Ware to run in full screen mode (XP Pro VM) on Ubuntu. The manual has a short section on this, but it makes no sense to me. It says:<BR><BR>"When you switch a ...