I got the same problem, with the same workaround, today just after upgrading Mozilla Firefox to v18.0. I had a hard time solving the problem.
Symptoms: * Anything linked to libgio-2.0 do segfault. * cannot login using xfce4-session or gnome-session * dbus not working either * using xinit and then opera, I could still use internet! Workaround: rm ~/.local/share/mime/mime.cache Log: $ cat /var/log/kern.log | tail -1 Jan 11 22:58:42 asuslinux kernel: [ 868.425016] xfce4-session[4187]: segfault at 5bb51138 ip b69af4d1 sp bfe035b0 error 4 in libgio-2.0.so.0.3400.1[b68b8000+15b000] Versions: $ dpkg -l |grep glib ii libglib2.0-0:i386 2.34.1-1ubuntu1 i386 GLib library of C routines $ uname -a Linux asuslinux 3.5.0-22-generic #33-Ubuntu SMP Wed Jan 2 21:45:40 UTC 2013 i686 i686 i686 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to glib2.0 in Ubuntu. https://bugs.launchpad.net/bugs/402693 Title: Everything whick is linked against libgio-2.0 core dump To manage notifications about this bug go to: https://bugs.launchpad.net/glib/+bug/402693/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs