gnome-settings-daemon crashed with SIGSEGV in exit()

I am able to reproduce this bug on a different machine with the Oneiric amd64 20110526.1 daily-live CD.

Also, on that amd64 machine, the crash occurs repeatedly as well, and it occurs in a Unity session as well as in a classic session. (The i386 test machine on which I reported this originally doesn't support Unity, so I wasn't able to test that.)

confirmed by duplicate.

probably worth mentioning Bug #788714 here, as the 2 crashes seem to occur together.

To clarify https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/788710/comments/3, I was able to produce this in a 3d unity session, as well as in a unity-2d session. (And now with the Oneiric i386 Alpha 1 CD, I've seen it in 3d unity on a separate i386 machine as well.)

This bug was reported more than week ago, but the stack trace is not available yet. Is there something wrong with Apport Retracing service?
Also, I confirm that it occurs together with bug 788714.

this bug occured for me on a fully installe dversion of 11.10 (rather than a live CD)

Unity 3d straight after logging in

 Bug 788714 is fixed, is anybody still getting this?

gnome-settings-daemon 3.0.2-1ubuntu2 was released on 7 June 2011, the same day as gnome-user-share 3.0.0-2ubuntu1 (which fixed bug 788714). Since then, I have not gotten the crash in this bug, but I have gotten a crash on logout which reminds me of it. I've reported this as bug 795392; there are more details there.

Thanks for following up. I'm closing this report due to your last comment.
Don't hesitate to submit any new bug.

I'm fairly sure I experienced this with gnome-settings-daemon 3.0.2-1ubuntu2 on a daily build from today. The stack trace looks identical. See bug 795596 more details.

@Hans:
Yes, the trace is identical, so marked as a duplicate. I experienced this crash too yesterday, but I'm not sure I had all the latest updates.
Someone, please revert the status to Confirmed.

Changed back to Confirmed based on information from Hans Joachim Desserud (duplicate bug bug 795596).

With gnome-settings-daemon 3.0.2-1ubuntu3 (and possibly earlier versions, I haven't tried), this bug appears to be reliably producible by launching a second concurrent instance of gnome-settings-daemon (i.e., running it when it's already running). I have gotten this to happen on two separate, similarly configured Oneiric i386 systems in unity-2d sessions by running "gnome-settings-daemon" in Terminal windows. While gnome-settings-daemon needn't support multiple instances, a second instance of gnome-settings-daemon should gracefully exit--it should not segfault (and in any case, there may well be other situations where this crash occurs).

On one of the Oneiric i386 systems, I was able to produce a better stack trace. I have reported that crash as duplicate bug 796497.

Are others able to reliably reproduce this crash the same way? If so, we can edit the bug's description to include it as an easy way to make the crash happen.

ek@Nyaa:~$ gnome-settings-daemon

** (gnome-settings-daemon:1932): WARNING **: You can only run one xsettings manager at a time; exiting

** (gnome-settings-daemon:1932): WARNING **: Unable to start xsettings manager: Could not initialize xsettings manager.

** (gnome-settings-daemon:1932): WARNING **: Name taken or bus went away - shutting down
Segmentation fault (core dumped)

If you can easily reproduce, can you please run:

$ ls /usr/lib/gnome-settings-daemon-3.0/

the crash is at an atexit() handler indeed, but gnome-settings-daemon doesn't install any, so I guess it might be an external g-s-d plugin or one of the libraries used in g-s-d. So, once we get the output of that 'ls' command, we'll see what -debug package to install, to get better information of what exit handler is making g-s-d crash

$ ls -l /usr/lib/gnome-settings-daemon-3.0/
total 760
-rw-r--r-- 1 root root 7641 2011-06-10 16:55 a11y-keyboard.gnome-settings-plugin
-rw-r--r-- 1 root root 4728 2011-06-10 16:55 a11y-settings.gnome-settings-plugin
-rw-r--r-- 1 root root 3959 2011-06-10 16:55 automount.gnome-settings-plugin
-rw-r--r-- 1 root root 4957 2011-06-10 16:55 background.gnome-settings-plugin
-rw-r--r-- 1 root root 5456 2011-06-10 16:55 clipboard.gnome-settings-plugin
-rw-r--r-- 1 root root 169 2011-06-10 16:55 gconf.gnome-settings-plugin
drwxr-xr-x 2 root root 4096 2011-05-30 14:20 gtk-modules
-rw-r--r-- 1 root root 264 2011-06-10 16:55 housekeeping.gnome-settings-plugin
-rw-r--r-- 1 root root 5498 2011-06-10 16:55 keybindings.gnome-settings-plugin
-rw-r--r-- 1 root root 5361 2011-06-10 16:55 keyboard.gnome-settings-plugin
-rw-r--r-- 1 root root 34516 2011-06-10 16:55 liba11y-keyboard.so
-rw-r--r-- 1 root root 9584 2011-06-10 16:55 liba11y-settings.so
-rw-r--r-- 1 root root 38844 2011-06-10 16:55 libautomount.so
-rw-r--r-- 1 root root 17888 2011-06-10 16:55 libbackground.so
-rw-r--r-- 1 root root 21980 2011-06-10 16:55 libclipboard.so
-rw-r--r-- 1 root root 13784 2011-06-10 16:55 libgconf.so
-rw-r--r-- 1 root root 39012 2011-06-10 16:55 libhousekeeping.so
-rw-r--r-- 1 root root 51272 2011-06-10 16:55 libkeybindings.so
-rw-r--r-- 1 root root 34688 2011-06-10 16:55 libkeyboard.so
-rw-r--r-- 1 root root 146824 2011-06-10 16:55 libmedia-keys.so
-rw-r--r-- 1 root root 55340 2011-06-10 16:55 libmouse.so
-rw-r--r-- 1 root root 22100 2011-06-10 16:55 libprint-notifications.so
-rw-r--r-- 1 root root 13800 2011-06-10 16:55 libsound.so
-rw-r--r-- 1 root root 47032 2011-06-10 16:55 libwacom.so
-rw-r--r-- 1 root root 34608 2011-06-10 16:55 libxrandr.so
-rw-r--r-- 1 root root 39216 2011-06-10 16:55 libxsettings.so
-rw-r--r-- 1 root root 5830 2011-06-10 16:55 media-keys.gnome-settings-plugin
-rw-r--r-- 1 root root 4391 2011-06-10 16:55 mouse.gnome-settings-plugin
-rw-r--r-- 1 root root 3976 2011-06-10 16:55 print-notifications.gnome-settings-plugin
-rw-r--r-- 1 root root 605 2011-06-10 16:55 sound.gnome-settings-plugin
-rw-r--r-- 1 root root 140 2011-06-10 16:55 wacom.gnome-settings-plugin
-rw-r--r-- 1 root root 6700 2011-06-10 16:55 xrandr.gnome-settings-plugin
-rw-r--r-- 1 root root 5605 2011-06-10 16:55 xsettings.gnome-settings-plugin

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I have the same entries, except for the gtk-modules directory (so that directory and its contents aren't what's producing this bug).

StacktraceTop:
 ?? ()
 __run_exit_handlers (status=0, listp=0xe86324, run_list_atexit=true) at exit.c:72
 __on_exit (func=0, arg=0xbfa35c84) at on_exit.c:28
 __libc_start_main (main=0x804a8a0 <main+64>, argc=1, ubp_av=0xbfa35c84, init=0x804d680 <__libc_csu_init+64>, fini=0x804d6e0 <_fini+4>, rtld_fini=0x4c5a50, stack_end=0xbfa35c7c) at libc-start.c:232
 __do_global_dtors_aux ()

i have the same Problem,
i changed settings in dconf: /org.gnome.settings-daemon.peripherals.mouse
but the daemon was updated before, so i think it´s more a problem with the update than the change, becaus i have reseted all to default in dconf but the crash still persists.

Given the number of people affected, am increasing the priority on this.

Bug still exists in fully updated Alpha2

while trying to run update-manager in oneric alpha2 x64 unity

This is due to the atexit installed in ORBit, which is unloaded as soon as the gconf g-s-d plugin is unloaded. So when main() quits, the atexit function from ORBit is not available anymore. So, changing package for the bug and submitting a fix for ORBit in a bit

This bug was fixed in the package orbit2 - 1:2.14.19-0ubuntu3

---------------
orbit2 (1:2.14.19-0ubuntu3) oneiric; urgency=low

  * debian/patches/001-dont-use-atexit-handlers.patch:
    - Use GNU C extension instead of atexit handlers (LP: #788710)
 -- Rodrigo Moya <email address hidden> Wed, 13 Jul 2011 13:21:40 +0200