I'm running 13.10 as host, with a VirtualBox 4.2.16_Ubuntu running Windows 8.1 as guest. I had the virtual machine in full screen mode when Ubuntu locked due to inactivity.
I tried to wake the machine and discovered the standard unlock screen, where I could move the mouse pointer but could not type any characters into the password box.
I switched terminals, logged in, and shutdown the virtual machine programatically. However, I was still unable to type in the password box on the lock screen.
I ended up just rebooting the real (host) machine, which worked fine I guess :-/
Two questions:
- Any idea what happened here?
- Is there a way to resolve this without rebooting the whole computer?
Best Answer
I have had the same problem on 14.04. I usually run 2 Virtualbox VMs (Windows 8.1 and CentOS 6.5). I've been running both in full screen mode on separate workspaces and my lock screen was preventing me from unlocking my computer. I found this post, so instead of running my VMs in full screen using the Virtualbox menus, I just maximized them. It's not the same VM experience (lost a little screen real estate), but I haven't had a problem with my lock screen all morning.
FYI, it also fixed my problem where VMs would move to a different workspace after waking the screens from sleep.