I have a dualboot setup with Windows 8.1 and Ubuntu 14.04. I am using the latest VirtualBox Version 4.3.24r98716
I am able to boot the partition fine either from BIOS or from Windows 8.1 host fine.
the problem happens when I install the VBoxGuestAdditions from the ISO.
I can type in username and password, but once I login and the modules for VBoxGuestAdditions get patched over the keyboard does not respond at all.
I have deleted `$autokeyboard` from /etc/init.d/vboxadd-x11` to see if that makes the difference, but it does not.
I also tried various configuration changes (e.g. capture keyboard), but I don't think anything can be done from the host side configuration.
When I boot directly into the partition, everything is working fine.
If I uninstall VBoxGuestAddition, the fullsize screen and (presumably) the directory share is gone, but the keyboard works again.
How can I troubleshoot this?