I installed Virtualbox on Mac and then installed Ubuntu on Virtualbox as a virtual machine. My Ubuntu display comes as 640 X 480 (4:3) resolution and cannot be changed. My actual screen resolution is 1360 X 768. I set the correct screen size in Virtualbox > preference > display. Still no success. What can I do?
(I use OS X Mavericks, Virtualbox 4.3.12, Ubuntu 14.04)