From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: 2.6.15-rt18, alsa sequencer, rosegarden -> alsa hangs Date: Tue, 7 Mar 2006 23:06:28 +0100 Message-ID: <20060307220628.GA27536@elte.hu> References: <1141769000.5565.21.camel@cmn3.stanford.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1141769000.5565.21.camel@cmn3.stanford.edu> Sender: linux-kernel-owner@vger.kernel.org To: Fernando Lopez-Lezcano Cc: linux-kernel@vger.kernel.org, alsa-devel@lists.sourceforge.net, cc@ccrma.Stanford.EDU List-Id: alsa-devel@alsa-project.org * Fernando Lopez-Lezcano 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. Ingo