[Pkg-utopia-maintainers] Bug#471565: dbus-daemon segfaults

[George Kiagiadakis]

I'm getting a similar crash sometimes. This week it happened twice and it has 
happened in the past too... For me, the *user* dbus-daemon segfaults, making 
my kde4 desktop unusable (keyboard shortcuts stop working, communication with 
kded4, knotify4, klauncher, krunner and kio slaves is broken, I can't start 
new apps, etc...).

The error in dmesg is:
dbus-daemon[18614]: segfault at 7f1173558720 ip 00007f1172416a92 sp 
00007fff7afb60c8 error 4 in libc-2.7.so[7f117239c000+14a000]

This is a very annoying bug. Each time it happens, I have to kill X by 
ctrl+alt+backspace (logout doesn't work, it requires dbus!) and then login in 
a vt and start killing the remaining kde processes that are not killed with 
Xorg for some reason. These are knotify4, kwrited, krunner, artsd and kmail, 
which requires SIGKILL instead of SIGTERM for some reason...

Unfortunately I can't find any way to debug this. dbus-daemon doesn't seem to 
keep any logs and there is no standard way of reproducing, so that I can 
attach a gdb, crash it and get a backtrace. Even if I could, dbus-daemon comes 
packaged without debug symbols, so that makes it even harder...

These bug reports seem related:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=495894
https://bugs.launchpad.net/ubuntu/+source/dbus/+bug/237527