I created a 64-bit ubuntu 16.04.3 guest VM on a Windows 7 Pro 64-bit host using Oracle VirtualBox 4.3.12. (Ubuntu VMs won't even start in later versions of VirtualBox.)
However the new VM only has a max screen size of 1024 x 768 compared to my 1920 x 1080 screen resolution. It's hard to work on a VM with such a small resolution.
I tried the following steps after the install to allow me to use a higher screen resolution, but none worked:
sudo apt-get update
Restarted VM as requested.
sudo apt-get install virtualbox-guest-dkms
sudo apt-get install virtualbox-guest-x11
This failed with unmet dependencies, including
xserver-xorg-core, so I did:
sudo apt-get install xserver-xorg-core sudo apt-get install virtualbox-guest-x11
Restarted VM. But now the VM starts up in an even smaller resolution (800 x 600?) and when I mouse over it the cursor disappears! Also, keyboard input is now ignored.
Does anyone know (a) how I can interact with my VM again and (b) allow me to have a larger maximum screen resolution? I don't care whether the screen re-sizes automatically; I just want a larger resolution so my VM is usable.
EDIT This isn't a duplicate of How to install VirtualBox Guest Additions for Ubuntu 16.04 because that says to install the latest version of VirtualBox. Here's the error I get when I installed vbox 5.1.28 and try to start one of my ubuntu VMs:
AFAIK Where I work no-one's ever succeeded in running an ubuntu VM on a version of VirtualBox > 4.3.12. Possibly due to a clash with corporate antivirus software as the error implies. Also, I first need to be able to interact with my VM via mouse or keyboard before I can install Guest Additions.