I recently installed Ubuntu 13.10 64bit alongside Windows 7 64bit, and both ran fine. Then I installed AMD graphic driver for my video card radeon R9 270 following the 3rd(manual) procedure given in these instructions.
- I installed AMD catalyst 13.12.
Everything installed successfully according to the link, but then, after restarted my system and booting into Ubuntu I got a black screen with:
"Input signal out of range"
- My monitor doesn't support 1920x1080, it support 1366x768 natively.
I tried booting again and entered Ctrl+Alt+F1, then:
gksudo gedit /etc/default/grub [or] gksu gedit /etc/default/grub [or] sudo gedit /etc/default/grub
but every time it gave the same result:
"Cannot open display"
I tried searching for a solution this whole day but couldn't find something useful, so please help me to resolve this issue.