Black screen after login

On my FC 17-65 XFCE Spin system with noveau video driver, the following problem has cropped up:

I boot and login as an ordinary user. The XFCE desktop appears. I click the mouse on something and the desktop vanishes. Instead of the desktop I see the printing from the last text boot screen. Usually the login screen reappears, but sometimes I just stay stalled on the text screen.

I am trying to install lubuntu 12.1 PPC using the alt cd on an ibook g4. I've been having a few problems. First, when lubuntu boots it only boots to a black screen, my cursor is visible and brightness functions work but that's it, no login screen ever comes up. I tried logging in after pressing ctrl+alt+f1 but my login didn't work.

i installed a graphics update when i restarted it starts up with a blank screen i have pressed ctrl/alt f2 and it goes to term i put log in and and pass but it stays in term i have tried pressing ctrl/alt f8 but all i get is a little flashing cursor at the top left hand side of screen how can i resolve this i am nowon another computer at the moment

I installed 11.10 on my desktop. After the intro screen from the Intel motherboard, I just get a black screen. I've looked at the various fixes online which would require access to tty1 but hitting Ctrl+Alt+F1 doesn't work for me. I just remain stuck at the screen.

Hi, I have a problem logging back in to an X session. Only the very first (after bootup) login screen is diplayed. When I log in and later loggout the X login screen never comes back on. The screen stays blank/black. Technicaly I can "blindly" login to an X session again because the machine normaly runs, but I cannot see the X login screen.

I'm having problems with the update to 12.04.2 (x64).

I ran the updates and rebooted the machine. It started backup in TTY1 (I've had this happen before no biggy) so I hit Ctrl+Alt+F7 and got nothing. So I logged in, typed startx and it somewhat worked. I got my mouse and my desktop background and nothing after that.

I have a Dell laptop with an Nvidia Quadro 770M video card. Just installed Ubuntu 11.04, which failed to boot properly, with a black screen.

I did Ctrl-Alt-F1 to get into a terminal, killed gdm and installed the latest drivers from the nvidia website, which the installer said was successful. upon restarting, I still get a blank screen.

Ubuntu 11.10 64 bit on Dell Optiplex. I'm using Synergy but I'm not sure the problem is related to it.

The screen freezes after coming back from screen saver. (It's not suspend because my Power setting is Don't suspend.) The blank screen turned back to the last screen I used but no response. Mouse is still moving.

I installed #! on my thinkpad t530. The installation seemed to go fine, but when it comes time to boot up and load, I am met with a rapidly flashing, blank screen, instead of the login screen.