Hi folks! I've installed Xubuntu 13.10 64-bit in a new VirtualBox guest, and even after installing dkms, linux-kernel-headers and VBoxGuestAdditions the max resolution available still 800x600.

The host PC is a Windows 8 Home Edition 64-bit running VirtualBox 4.2.18.

No errors were reported during VboxGuestAdditions install.

It's a notebook from my company, I can't remove Windows by now... is there any fix to this problem?