I'm running Ubuntu 12.04 on a mac using Virtual Box. I tweaked /etc/default/grub to boot the machine into terminal mode only. I restarted, and everything was working fine. However, the terminal screen seemed very small so I went back and tweaked the GRUB_GFXMODE= part to 1500x800. I did sudo update-grub again, and then restarted. However, after restarting the machine gets stuck with this screen. Anybody have any ideas on what to do? Ubuntu version is 12.04, running on Mac OS X 10.8.