I have recently installed Ubuntu 13.10 64bit.
It was, by default, using the Nouveau display driver, however, this caused suspend to fail, but installing a proprietary driver resolved this issue but created an ugly low res boot screen.
This is the solution that worked for me. (for those who have this common issue)
Run in Terminal
1.sudo apt-get install v86d
2.gksu gedit /etc/default/grub
3.Replace Line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
New Line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset video=uvesafb:mode_option=1920x1080-24,mtrr=3,scroll=ywrap"
New Line:#GRUB_GFXMODE=1920x1080 6.Save & Close
7.gksu gedit /etc/initramfs-tools/modules
8.Add Line: uvesafb mode_option=1920x1080-24 mtrr=3 scroll=ywrap Save & Close
10.sudo update-initramfs -u