Although having totem-gstreamer-dbgsym installed, the backtrace is not useful.. martin at martin-desktop:~$ dpkg -l | grep totem-gstreamer-dbgsym ii totem-gstreamer-dbgsym 2.17.91-0ubuntu3 debug symbols for package totem-gstreamer -- [apport] totem crashed with SIGSEGV https://launchpad.net/bugs/85423