You can use your own systemd --user service for it (to circumvent all the weird dbus stuff). Talked about this at this year's LAC. http://lac.linuxaudio.org/2015/download/lac2015_arch_slides.pdf
For reference (you can get the package from the AUR, it's called uenv-git): https://git.sleepmap.de/uenv.git/tree/user/jack@.service https://git.sleepmap.de/uenv.git/tree/config/fw1 On 06.06.2015 16:35, Harry van Haaren wrote: > On Sat, Apr 4, 2015 at 8:13 PM, Adrian Knoth > <a...@drcomp.erfurt.thur.de <mailto:a...@drcomp.erfurt.thur.de>> wrote: > > Not enough information. I recommend starting jackd with strace > > Done - apologies for the delay. Strace output available[1], but the > most interesting part copied here: > > sched_get_priority_min(SCHED_FIFO) = 1 > sched_setscheduler(0, SCHED_FIFO, { 1 }) = -1 EPERM (Operation not > permitted) > write(2, "\nJACK is running in realtime mod"..., 87 > JACK is running in realtime mode, but you are not allowed to use > realtime scheduling. > ) = 87 > > > > This code tries to call sched_setscheduler() with SCHED_FIFO. My > bet is > that your "almost vanilla kernel" fails to fulfil this request, but > strace will tell you for sure. > > By "almost vanilla" I meant the Arch linux packaged version - I didn't > change the config myself (and Arch aims to be true to vanilla). A very > accurace prediction though - indeed sched_setscheduler() is causing a > return of -1. This is running as root though - so something is wrong here. > > > The question is why said call should fail. The only thing that > comes to > my mind are CGROUPS. Maybe your old kernel comes without, the new > kernel > supports them and the configuration is set in a way that disables > SCHED_FIFO by default. > > Perhaps - I'm not experienced with cgroups or such, if anybody has any > test ideas for me I'll try them out? > > Cheers, -Harry > > [1] http://openavproductions.com/tmp/straceJackd.txt > > > > _______________________________________________ > Linux-audio-dev mailing list > Linux-audio-dev@lists.linuxaudio.org > http://lists.linuxaudio.org/listinfo/linux-audio-dev -- David Runge Köpenicker Straße 163 10997 Berlin http://www.sleepmap.de
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