the -p (port max) is an argument to the SERVER, not the backend. jack command line syntax: jackd [ SERVER ARGUMENTS ] -d BACKEND [ BACKEND ARGUMENTS ] the -p should come before the -d. On Fri, Jul 31, 2015 at 6:59 PM, Peter P. <peterparker@xxxxxxxxxxxx> wrote: > Hi list, > > today I got some time to play around with RME's Madiface (and its > ExpressCard) under Linux/Jack. The card uses Thomas' old hdspmixer with > correct display and routing abilities, it's simply awesome to have 64Ins > and 64outs on a Linux laptop! > > However I didn't get beyond the following weird problem: > > Starting PureData outputting 64 channels via jack as > pd -jack -channels 64 > works and connects and outputs to the Madiface's hardware outs. > > If I try to start other audio software (mplayer, alsaplayer) asking them > to output to the first two jack outputs (while Pd is also using them), > I get in qjackctl's message window > no ports available! > > and in mplayer > cannot deliver port registration request > [JACK] not enough ports available > Failed to initialize audio driver 'jack' > > and in alsaplayer > cannot deliver port registration request > cannot deliver port registration request > Segmentation fault > > all followed by a massive xrun in qjackctls message window > **** alsa_pcm: xrun of at least 4995.700 msecs > > Now if I start Pd with less outputs, for examples > pd -jack -channels 32 > then mplayer is perfectly able to output on the the first two hardware > channels in parallel with Pd. > > The weird thing: Jackd's 'max port' argument is set to 256, and the problem persists > also with 512 ports. > > Am I missing something here? > > Background info: > jackd version 0.124.1 tmpdir /dev/shm protocol 25 > > is started via qjackctl as > jackd -P89 -t5000 -dalsa -r44100 -p256 -n2 -D -Chw:Default -Phw:Default -i64 -o64 > > on kernel > 3.14-2-rt-amd64 #1 SMP PREEMPT RT Debian 3.14.15-2 (2014-08-09) x86_64 GNU/Linux > > Thank you for any suggestions! > Peter > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/listinfo/linux-audio-user _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
