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I am on Xubuntu 13.10 64 bit. This question tells you everything you need to know about my graphic card.

Yesterday I had a problem, my graphic card driver failed, now if I login to xubuntu default desktop, all I see is a black screen however I can login to xfce session

The output of inxi -G:

Graphics:  Card-1: Intel 2nd Generation Core Processor Family Integrated Graphics Controller 
           Card-2: Advanced Micro Devices [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series] 
           X.Org: 1.14.5 drivers: fglrx,intel Resolution: 1366x768@60.0hz 
           GLX Renderer: AMD Radeon HD 6400M Series GLX Version: 4.2.12337 - CPC 13.101

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xsession-errors

Script for cjkv started at run_im.
Script for default started at run_im.
openConnection: connect: No such file or directory
cannot connect to brltty at :0
Xsession: X session started for elie at Mon Mar 10 10:16:26 EET 2014
localuser:elie being added to access control list
openConnection: connect: No such file or directory
cannot connect to brltty at :0
Script for cjkv started at run_im.
Script for default started at run_im.
Script for cjkv started at run_im.
Script for default started at run_im.
libGL error: failed to load driver: i965
libGL error: Try again with LIBGL_DEBUG=verbose for more details.
gnome-session-is-accelerated: llvmpipe detected.
x-session-manager[2113]: CRITICAL: We failed, but the fail whale is dead. Sorry....
Xsession: X session started for elie at Mon Mar 10 10:17:23 EET 2014
localuser:elie being added to access control list
openConnection: connect: No such file or directory
cannot connect to brltty at :0
Script for cjkv started at run_im.
Script for default started at run_im.
Script for cjkv started at run_im.
Script for default started at run_im.
libGL error: failed to load driver: i965
libGL error: Try again with LIBGL_DEBUG=verbose for more details.
gnome-session-is-accelerated: llvmpipe detected.
x-session-manager[2466]: CRITICAL: We failed, but the fail whale is dead. Sorry....

/var/log/Xorg.0.log.old and /etc/X11/xorg.conf. Note that I no longer have xorg.conf, because I followed the answers below, but even if I generate new file, It will be looking like the file above, I tried it.

Community
  • 1
Lynob
  • 6,775

4 Answers4

3

Your xorg.conf has two device sections:

Section "Device"
    Identifier  "aticonfig-Device[0]-0"
    Driver      "fglrx"
    BusID       "PCI:1:0:0"
EndSection

Section "Device"
    Identifier  "intel"
    Driver      "intel"
    Option      "AccelMethod" "uxa"
EndSection

This is causing your machine to attempt to load both the fglrx and the intel drivers. While it is actually possible to use multiple graphics cards on Linux, I doubt you can do that with an integrated (intel) and a dedicated (ATI) one. It is very likely that removing the intel section will return everything to normal (assuming the fglrx driver works on your system but as I understand it used to, so it probably will). So, comment out the intel section and keep only fglrx:

Section "Device"
    Identifier  "aticonfig-Device[0]-0"
    Driver      "fglrx"
    BusID       "PCI:1:0:0"
EndSection

#Section "Device"
#    Identifier  "intel"
#    Driver      "intel"
#    Option      "AccelMethod" "uxa"
#EndSection

Then restart X and, assuming there is no other issue, everything should be fine.

If not, you can try creating a new xorg.conf using ATI's configuration tool, aticonfig:

sudo aticonfig --initial

If you do go down this road, I also recommend you read through that program's options, they're quite extensive:

aticonfig --help | less

Finally, the Arch wiki page on ATI/AMD cards is a great source of information on this kind of thing.

terdon
  • 104,119
1

Try to purge the GC drivers and reinstall:

sudo apt-get purge fglrx fglrx-pxpress

sudo apt-get update

sudo apt-get upgrade

sudo apt-get install fglrx fglrx-pxpress

If that doesn't fix it, time to edit XConfigs!

Kaz Wolfe
  • 34,680
0

I think you could try to uninstall first your third-party driver. Then try deletesudo rm /etc/X11/xorg.conf and reboot. XSERVER will create a new one.

Rmano
  • 32,167
Finn Krauß
  • 126
0

A shot in the dark --- let's suppose is not the graphic drivers. What is failing seems to be the x-session-manager script, due to a bug in libGL.

So I would try:

1) calling manually startx in a terminal. If the graphic screen appears, the drivers are working ok, and the problem is somewhere else. (You'll probably have just one naked terminal in it).

2) Try to reconfigure gdm or lightdm. By the way, I could not start xubuntu desktop with lightdm windows manager, I had to install gdm. So could be 

sudo dpkg-reconfigure gdm

And/or the corresponding sudo apt-get install gdm if you do not have it.

3) going deeper, it may be the 3D graphics failing. Have you installed xorg-edgers or something like that? Maybe it is a recent bug in it.

4) and as a last resort, you can try some non-accelerated desktop, like Gnome classic or Ubuntu 2D.

5) Try to login as a guest user to see if the problem is related to some strange configuration file.

6) and as a voodoo-kind of thing: check is there is some strange dot file (with ls - lad .*) owned by root stick in your home dir --- I once had a $DEITY-know-how-was-there .Xauthority file owned by root that blocked all my logins...

Hope this helps... but probably not.

Rmano
  • 32,167