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First firefox froze, so I started System processes and ended firefox. Then it happened again but when I ended firefox in System processes the whole desktop froze. So I pressed the restart button on the tower and now every time I enter my password the screen flashes black and then goes back to login screen.

So I pressed alt+ctrl+f1 and entered a shell. I then ran 

cat ~/.xsession-errors

Here is the output:

Xlib: extension "GLX" missing on display ":0".
Script for ibus started at run_im.
Script for auto started at run_im.
Script for default started at run_im.
init: gpg-agent post-stop process (3434) killed by TERM signal
init: gnome-session (Unity) main process (3485) terminated with status 1
init: unity-settings-daemon main process (3468) killed by TERM signal
init: logrotate main process (3362) killed by TERM signal
init: update-notifier-crash (/var/crash/_usr_bin_gedit.1000.crash) main process (3402) killed by TERM signal
init: upstart-dbus-session-bridge main process (3448) terminaed with status 1
init: xsession-init main process (3459) killed by TERM signal
init: hud main process (3480) killed by TERM signal
init: unity-panel-service main process (3492) killed by TERM signal
init: Disconnected from notified D-BUS bus

Please, anyone, if possible, either tell me where I might find a file containing information about what's going on, or, if you think you know a solution, post a solution. Thanks!

I ran less Xorg.0.log and found the following warnings (WW) and errors (EE):

(WW) The directory "/usr/share/fonts/X11/cryillic" does not exist.
         Entry deleted from font path. 
(WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
         Entry deleted from font path.
(WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist. 
         Entry deleted from font path. 
(WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
         Entry deleted from font path.
(WW) The directory "/usr/share/fonts/X11/75dpi" does not exist. 
         Entry deleted from font path.
(WW) "glamoregl" will not be loaded unless you've specified it to be loaded elsewhere.

(EE) NVIDIA: Failed to initialize the NVIDIA kernel module. Please see the system's kernel log for additions error messages and consult the NVIDIA README for details.
(EE) No devices detected.
(WW) xf86OpenConsole: setpgid failed: Operation not permitted.
(WW) xf86OpenConsole: setsiid failed: Operation not permitted.
(EE) [drm] KMS not enabled.
(EE) open /dev/dri/card0: No such file or directory.
(WW) Falling back to old probe method for modesetting.
(WW) Falling back to old probe method for vesa
(EE) Screen 0 deleted because of no matching config section. 
(EE) FBDE(0): FBIOBLANK: Invalid argument
(EE) Failed to initialize GLX extension (Compatible NVIDIA X driver not found).
Jon Doe
  • 123

2 Answers2

1

The first line suggests that OpenGL is not supported on your computer:

Xlib: extension "GLX" missing on display ":0".

You can find a log with more information on the display configuration, and any errors at:

/var/log/Xorg.0.log

It might be worth copying the log to a memory stick, since it will be rather long:

cat /var/log/Xorg.0.log > /media/username/nameOfUsbDevice/Xorg.0.log
David
  • 186
0

You appear to have installed the proprietary NVIDIA driver. Unfortunately, it is failing to detect a compatible graphics card, so it quits, and leaves your system without any kind of OpenGL acceleration.

(EE) NVIDIA: Failed to initialize the NVIDIA kernel module.
(EE) No devices detected.
(EE) Failed to initialize GLX extension

Can you check what graphics cards are listed by the kernel?

sudo apt-get install lswh
sudo lshw -class display

If you see an Intel graphics card listed, you may be able to get OpenGL support by uninstalling the NVIDIA driver and restarting the computer:

sudo apt-get remove --purge nvidia-*
sudo apt-get install ubuntu-desktop
sudo rm /etc/X11/xorg.conf

If you have more than one graphics card listed, check if your computer, or graphics card supports the NVIDIA Optimus technology. If so, uninstall the NVIDIA drivers, reboot your computer, and make sure everything is working. Then you can consider installing the Bumblebee software.

David
  • 186