[Bug 47646] Re: Rhythmbox can't start because an old instance is still running

[Sebastien Bacher]

you don't have a backtrace with your comment, but it looks like you are running rhythmbox from gdb instead of attaching the already running one with "gdb -p $(pidof rhythmbox). If you want to do it your way:
- gdb rhythmbox
(gdb) run
.... close it, it should keep running on the prompt, do Ctrl-C to stop it on gdb
(gdb) thread apply all bt

then you get a backtrace

-- 
Rhythmbox can't start because an old instance is still running
https://launchpad.net/bugs/47646