I have a Linux Mint 10 Host with Virtual Box 3.2.8 OSE installed.
I have installed Ubuntu 11.04 Beta as VBox guest but the VBox Guest Additions that come with VBox 3.2.8 won’t compile for the X11 on Ubuntu 11.04 so I was restricted to 1024×768 resolution.
My monitor supports a higher res. So to get a higher res in the Ubuntu 11.04 guest the answer is:
# install the vbox x11 module available # from the standard repositories in the guest sudo apt-get install virtualbox-ose-guest-x11 # reboot
Update Ubuntu 11.10
# install the vbox x11 module available # from the standard repositories in the guest sudo apt-get install virtualbox-guest-utils # reboot
There was one weird thing once I did the above and rebooted the guest. The guest would only give me 1280×960 instead of my actual physical monitor resolution of 1280×1024. But it’s better than what I had before.