Black screen when I move from X session to tty session

Question

I've the ATI proprietary drivers. When I power on the computer and I do the login all works well, but when I run xorg I can't change tty or exit from xorg because if I try I see only a black screen (the monitor backlight stays on).

• If I change tty (ctrl alt f2) I've the black screen, if then I return to xorg (ctrl alt f1) it works.
• If I close or kill xorg I've the black screen and I must reset the computer.

This is the Xorg log when I go to tty2 and during the blackscreen [ 312.470] (**) Option "fd" "24" [ 312.470] (**) Option "fd" "17" [ 312.470] (**) Option "fd" "23" [ 312.470] (**) Option "fd" "33" [ 312.470] (**) Option "fd" "20" [ 312.471] (**) Option "fd" "22" [ 312.471] (**) Option "fd" "21" [ 312.471] (II) AIGLX: Suspending AIGLX clients for VT switch [ 312.471] (II) fglrx(0): Backup framebuffer data. [ 312.560] (II) fglrx(0): Backup complete. [ 312.596] (II) systemd-logind: got pause for 13:68 [ 312.596] (II) systemd-logind: got pause for 13:67 [ 312.596] (II) systemd-logind: got pause for 13:69 [ 312.596] (II) systemd-logind: got pause for 13:65 [ 312.596] (II) systemd-logind: got pause for 13:64 [ 312.596] (II) systemd-logind: got pause for 13:66 [ 312.596] (II) systemd-logind: got pause for 13:70

What can I do?

Answer 1

ATI drivers are terrible on Linux. Try other driver versions, x and kernel too. Eventually it will work, but don't expect radeon to be stable at all. Everybody I know get continous X crashes or some artefacts, and performance is not better too.

Answer 2

I've solved. I looked the log: backup framebuffer data, that it means that it changes framebuffer. I've thinked: "The framebuffer doesn't work maybe?". So I have try to change framebuffer using this: https://wiki.archlinux.org/index.php/Uvesafb and now it works. And I think this is also the only way, for ATI proprietary drivers, to really change TTY resolution.