virtualbox.org

I have Ubuntu Server 20.04 in a VB on my Mint 20 desktop. I have installed GuestAdditions but the mouse is not working.
If I move the mouse across my desktop it disappears at the VB window. If I click when in the window nothing happens, but if I select Input>Mouse Integration and click in the window I get the pop-up saying that it will be captured. If I click Capture the mouse is still not visible in the window, or on my main desktop.

Currently I have no means of highlighting, copying, etc from/to the VB window. Any ideas?

I have other OS working fine in VB, just Ubuntu Server that causes this problem.

Thanks
Mick

Ubuntu Server has a 'pure' text only interface (No GUI). What do you expect a mouse to be able to do?

If I log in to my real server, also Ubuntu Server 20, I can highlight text to copy it, I can use centre mouse button to paste into it, non of that works on the VB version.

That sounds like additional software that someone has installed on that server, perhaps in the mouse driver iself. There's no OS supported copy/paste without a clipboard as part of a GUI, and virtual devices in a VM do not inherit the special features of actual host devices they may employ. The mouse in a VM is a generic PS/2 mouse.

Both were straight clean installs of Ubuntu Server 20.04 Aren't those functions just standard with any terminal window?

A terminal window is something offered by a GUI, and is quite distinct from a text mode display (no GUI).

In any case you are describing a software feature, not a feature of the mouse hardware. The hardware part is sending signals when the mouse moves or standard buttons are clicked. What an application or OS does with button clicks is up to it.

OK thanks for the clarification.
Understanding that I have realised that I can connect to it via ssh, I then see it in a terminal window and do what I wanted. Success!!