if I can, I'd be more than happy to help. Would you get more usefull strace output if you had some break points in where you think the problem may be? If so, I will test on my end. Let's find facts yo. Thanks, Peter On Nov 27, 2007 6:49 PM, Rui Nuno Capela <rncbc@xxxxxxxxx> wrote: > John Anderson wrote: > > On Tue, 2007-11-27 at 14:33 +0000, Rui Nuno Capela wrote: > >> On Tue, November 27, 2007 12:10, John Anderson wrote: > >>> I'm finding that qjackctl-0.3.0, 0.3.1 and 0.3.1a all use up 49% cpu. My > >>> box is a CoreDuo, so that's probably 100% of one cpu. > >>> > >>> qjackctl-0.2.22 doesn't do this, so I've downgraded for now. > >>> > >>> If it's a bug, what can I do to help? > >>> > >> symptoms are that right after jackd is started the first time, qjackctl > >> starts eating 98% of a cpu, isn't it? > > > > It also happens when I have an existing jackd running, and I start up > > qjackctl. > > > >> it's a known issue on some Qt4 incarnations, specially the debian based > >> ones, iirc. it has been reported on at least one case that updating to a > >> different libqt4 makes the issue go away. > > > > I've just upgraded from qt-4.3.1 to qt-4.3.2, and the problem is still > > there. > > > > it's not quite a nominal qt4 version issue here, but seems to be due on > some circumstantial libqt4 build conditions (compile time flags?). for > example, i had this one report on debian testing (lenny) that the latest > libqt4-4.3.2 got it through alright, but most of the previous > iterations, including an early one also tagged as libqt4-4.3.2, was > indeed infected. > > > >> unfortunately, i never caught that behavior reproduced on any of my > >> opensuse 10.x boxes, nor in windows :o) > > > > Makes it kinda hard to debug ;-| > > > > yes, people handed some strace outputs and it just boiled on some poll() > calls in libqt4, allegedly under QProcess class implementation. can't > say or dig any deeper from that, are just suspicions, not facts > > cheers > -- > rncbc aka Rui Nuno Capela > rncbc@xxxxxxxxx > _______________________________________________ > > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user > _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
