You can get to terminal by doing a three finger of CTRL-ALT-T
Also check how much RAM is shared to any integrated onboard video.
I have HP EliteBook 8440p and I am using Ubunto 13.04 64bit OS. I have 4GB of RAM installed in it but the details shows only 3.7GB of RAM is using. Is there any way to make it all the available 4GB of RAM?
This one tip will help you sleep better tonight
A few seconds are all you need to get a better night's rest.