I just created an Ubuntu 14.04 VM in VirtualBox (the host is Windows 7) and have noticed a strange "bug" occurring with the mouse. And yes I installed guest additions.
About 50% of the time, when I start the VM, it "registers" with my physical mouse, and when I mouseover the VM window, VBox correctly turns it into a "virtual mouse" on my Ubuntu desktop.
But about 50% of the time, something goes awry and as soon as I mouseover the VM window, my mouse just disappears. The only fix I've been able to find so far is to keep forcefully restarting the VM until I get lucky and the mouse registers/connects correctly.
What can I do to fix this?
Best Answer
There is a simple answer to this. VirtualBox latest guest addition 4.3.10 are still not fully compatible with Ubuntu 14.04. Screen auto-resizing issue, mouse pointer issue, shared clipboard issue and there are some others that occur intermittently with 14.04 VM.
Use Precise (12.04 Ubuntu) or wait for a new release of VBox to solve this issue.