[Ardour-Users] Cannot use real-time scheduling on Fedora23

Tim lists at kiuni.de
Mon Feb 8 04:36:25 PST 2016

Yes, I'm doing a documentation to install a Fedora Audio Production machine, but I'm not finished in writing all down.

Do you run realTimeConfigQuickScan? It's  interesting that the ccrma kernel is not recognized as a realtime kernel by this script. But this kernels config parameters seem to be fine.

Some more questions:
1. Did you write a udev rule for rtc0 and hpet?
2. Have you tried commenting out the lines for pulse-rt and setting memory limit to unlimited?
3. What about max_user_watches and swappiness in your /etc/sysctl.conf?
4. Did you use the server image for installation? When using the server iso you can switch to a mirror near you as installation source and you will a lot of installation options, i.e. another desktop environment.


Am 31. Januar 2016 04:02:27 MEZ, schrieb George Vergis <g_vergis at yahoo.com>:
>Hi All,
>I am not able to run jack in realtime mode with planet CCRMA kernel
>(4.1.12-300.rt13.1.fc23.ccrma.x86_64+rt). However, I can boot to a
>standard kernel and run jack with realtime scheduling privileges
>(Kernel: 4.3.3-303.fc23.x86_64). So I am assuming the permission and
>limits configuration common to both Kernel is not the issue.
>The error I get is...Cannot use real-time scheduling (RR/60)(1:
>Operation not permitted)
>AcquireSelfRealTime error
>These are steps I have taken so far...and still get the error above.
>1) Adding the username to jackuser and audio group  
>    groups>> wheel audio users jackuser pulse-rt2) Adjusted
>    @jackuser - rtprio 95
>    @jackuser - memlock 4194304
>    @pulse-rt - rtprio 20
>    @pulse-rt - nice -203) Rebooted the kernel.
>Just curious: is there anyone running the latest fedora, fedora 23, and
>the kernel-rt for audio production? 
>Any help is appreciated
>Ardour-Users mailing list
>ardour-users at lists.ardour.org
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