Re: [gdm-list] gdm freezes occasionally and locks the entire machine

[Brian Cameron <Brian Cameron Sun COM>]

Mertens:

I don't see anything strange in the GDM debug output.  It looks like
you are seeing some strange error messages from the Xserver, and the
backtrace seems to be in the Xserver glx code.  I suspect the problem
you are seeing is with your Xserver or with your graphics card driver.
If you don't get any help in the gdm-list forum, I'd recommend seeking
help from Xserver/GLX forums, or a forum focused on the graphics card
and driver you are using.

Biran


> I have been using GDM for several years and until recently did not
> experience any problems.
>
> Recently however GDM occasionally freezes up when a user quits a
> session (either Gnome or Enlightenment).  The screen becomes "garbled"
> and will not respond to anything.  Sometimes CTRL+ALT+BACKSPACE can be
> used to kill the X session so GDM can be restarted from the command
> line.
>
> However after switching back to the console (using CTRL+ALT+F1) to log
> out switching back to the X-session (using ALT+F7) results in a
> complete (graphical) system freeze.  Nothing but a couple of
> "weird" ascii characters is displayed on the screen.
> At this point all I can do is log in through ssh from another machine
> to stop and start the GDM.
>
> I have enabled debugging (added 'Enabled=true' to /etc/gdm/gdm.conf)
> but the only thing I see in the syslog when it happens is:
> Nov 14 15:10:01 localhost gdmgreeter[12000]: Sending command: 'CLOSE'
> Nov 14 15:10:01 localhost gdm[11827]: Handling user message: 'CLOSE'
> Nov 14 15:10:01 localhost gdm[11986]: gdm_slave_wait_for_login: In loop
>
> [ I believe this is the point where I issues /etc/init.d/gdm stop ]
>
> Nov 14 15:10:40 localhost gdm[11827]: mainloop_sig_callback: Got signal 15
> Nov 14 15:10:40 localhost gdm[11827]: mainloop_sig_callback: Got TERM/INT. Going down!
> Nov 14 15:10:40 localhost gdm[11827]: gdm_final_cleanup
> Nov 14 15:10:40 localhost gdm[11827]: gdm_display_unmanage: Stopping :0 (slave pid: 11986)
> Nov 14 15:10:40 localhost gdm[11986]: term_quit: Final cleanup
> Nov 14 15:10:40 localhost gdm[11986]: gdm_slave_quick_exit: Will kill everything from the display
> Nov 14 15:10:40 localhost gdm[11986]: Running gdm_verify_cleanup and pamh != NULL
> Nov 14 15:10:40 localhost gdm[11986]: gdm_server_stop: Server for :0 going down!
> Nov 14 15:10:40 localhost gdm[11986]: gdm_server_stop: Killing server pid 11989
> Nov 14 15:10:40 localhost gdm[11986]: gdm_server_stop: Server pid 11989 dead
> Nov 14 15:10:40 localhost gdm[11986]: gdm_slave_quick_exit: Killed everything from the display
> Nov 14 15:10:40 localhost gdm[11827]: gdm_display_unmanage: Display stopped
>
> I have also tried to disabled dri in /etc/X11/xorg.conf but the problem
> remained.  (It looks like I may need to disable it anyway.)
>
> I have found this in /var/log/gdm/:0.log.3:
> [...]
> (EE) RADEON(0): [agp] AGP failed to initialize. Disabling the DRI.
> [...]
> (**) RADEON(0): RADEONScreenInit finished
>
> Backtrace:
> 0: /usr/bin/X(xf86SigHandler+0x84) [0x80c4354]
> 1: [0xffffe420]
> 2: /usr/lib/xorg/modules/extensions/libglx.so [0xa7cb40ff]
> 3: /usr/lib/xorg/modules/extensions/libglx.so(__glXInitScreens+0xac) [0xa7c91c6c]
> 4: /usr/lib/xorg/modules/extensions/libglx.so(GlxExtensionInit+0x183) [0xa7c90c73]
> 5: /usr/bin/X(InitExtensions+0xa2) [0x80f0672]
> 6: /usr/bin/X(main+0x2aa) [0x806e4ba]
> 7: /lib/tls/libc.so.6(__libc_start_main+0xc8) [0xa7dd3ea8]
> 8: /usr/bin/X(FontFileCompleteXLFD+0xa9) [0x806d9d1]
>
> Fatal server error:
> Caught signal 11.  Server aborting
>
> (**) RADEON(0): RADEONLeaveVT
>
> I am running debian testing and my graphics card is an ATI Radeon
> 9200SE 5964.
>
> gdm is now at version, but it happed with previous versions as well.
> ii  gdm            2.16.1-1       GNOME Display Manager
>
> Any information on how to resolve this issue would be greatly
> appreciated.
>
> Regards
>
> Bram