I had very strange issue , I rebooted my PC (Ubuntu 10.10) , when the login screen comes back, what ever user I select it expands the password field and collapses it again in less than 1 second.
Some services like
vnc don't work so I can't login to it remotely, however I can login in tty but still can't login via GDM.
I tried to reinstall gnome via
sudo apt-get install --reinstall gnome-desktop and many other command about reconfigure gnome , but nothing help.
I recorded a video of the problem via my mobile camera (sorry about the low quality )
some of my error logs
xserver log and its the same in the
startup error log :
(ww) warning , couldn't open module nvidia (EE) Failed to load module 'nvidia' ( module doesn't exist , 0 ) (EE) no drivers avaliable fatal server error : no screens found
and now i was stuck in the recovery mode ,
normal mode isn't working any more
2- in the recovery mode + failxsafe : i had tried to create a default configuration for my hardware and after a reboot , with no luck the same problem again .
3-i had tried to reinstall nVidia driver as Jorge suggested in these setps :
sudo apt-get install nvidia-glx-96 /// i took a while sudo nvidi-setting -r to write new config
and after reboot nothing changed
4- i tried to install
sudo apt-get install nvidia-173 and after reboot the same error ,
sudo nividia-setting and the new error was
ERROR : the control display is undefined , please run
nvidia-setting --helpfor usage information
5- beofore this problem i was having this bug , but i wasn't know any thing about it :
Screen Blanks/Monitor Turns Off Using a laptop with a GeForce Go card, or connecting the sole display via DVI on a dual-head system sometimes results in the screen not receiving a picture. This is caused by the driver outputting video to the VGA port on the graphics card, instead of DVI. The usual hint that you have this problem is when you hear the startup sound but nothing appears on the screen. If you do not hear any sound, you are more than likely experiencing unrelated problems. This is a launchpad bug about displays on digital outputs being blank when using NVIDIA binary driver, and can be resolved by editing your /etc/X11/xorg.conf file: Switch to the console (Try using ctrl+alt+F1, or reboot and select recovery mode from the GRUB menu.) Use your text editor to open /etc/X11/xorg.conf. (try sudo nano /etc/X11/xorg.conf) Find the line that says Section "Screen" Insert a new line that says Option "UseDisplayDevice" "DFP". Save the file. If you had to restart into recovery mode, type reboot, otherwise restart your display using sudo /etc/init.d/gdm restart.
and i went to vim
/etc/X11/xorg.conf and tada the file is empty .
and ubuntu had backup file called
xorg.conf.backup , so i went to replace it and reboot ....... same error in the video .
Any help or suggestion is really appreciated.