Messages in this thread | | | Date | Wed, 08 Mar 2006 12:46:27 +0100 | From | Takashi Iwai <> | Subject | Re: [Alsa-devel] Re: 2.6.15-rt18, alsa sequencer, rosegarden -> alsa hangs |
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At Tue, 07 Mar 2006 22:53:55 -0800, Fernando Lopez-Lezcano wrote: > > On Tue, 2006-03-07 at 23:06 +0100, Ingo Molnar wrote: > > * Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU> wrote: > > > > > The symptoms are as follows: > > > - start jack using qjackctl > > > - start qsynth (gui front end for fluidsynth, a synth) > > > - start rosegarden (midi sequencer and audio recorder) > > > - load a midi file into rosegarden > > > - midi file plays successfully > > > - close rosegarden > > > at this point one of the threads of rosegarden fails to exit and stays > > > forever in the process list, in a ps axuw it shows as: > > > > > > nando 5484 0.0 0.0 0 0 pts/1 D 13:32 0:00 [rosegardenseque] > > > > > > Anything else that I try to stop that touches the alsa sequencer never > > > dies (qjackctl, vkeybd, qsynth, etc). Anything I try to start that tries > > > to use it does not start. This happened with two widely different > > > > could you get a tasklist-dump? It's either SysRq-T, or: > > > > echo t > /proc/sysrq-trigger > > > > that should dump all tasks and their backtraces - including the hung > > rosegardensequencer task. > > I'll try to do that tomorrow.
That'll be helpful. A deadlocked mutex could be easily found by a backtrace.
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