Dear Forum,
if I tried to start Ardour by using jack2 I got an error "No realtime", the log of Qjackctl shows the message as well, with the hint "no permission" or similar.
The file /etc/security/limits.d/audio.conf should be fine:
@audio - rtprio 95
@audio - memlock unlimited
My user is member of the group "audio".
After a long search I found a solution, which helps other users hopefully:
sudo sysctl -w kernel.sched_rt_runtime_us=-1
My question is how to make it permanent?
Thank you!
Sidpiet
Quote from: Sidpiet on 2026/03/11, 16:05:26
Dear Forum,
[...]
After a long search I found a solution, which helps other users hopefully:
sudo sysctl -w kernel.sched_rt_runtime_us=-1
My question is how to make it permanent?
Thank you!
Sidpiet
Make a file with a name to your liking ending in .conf (e.g. ardour.conf or 99-ardour.conf) and put it into the
/etc/sysctl.d directory.
Write "your"
kernel.sched_rt_runtime_us=-1 into it and it will (or should :) ) be executed automatically on the next boot.
Hi ro_sid,
Quote
Make a file with a name to your liking ending in .conf (e.g. ardour.conf or 99-ardour.conf) and put it into the /etc/sysctl.d directory.
works! I put it in the /etc/sysctl.conf before, which not did the trick!
Thank you!
Kind regard
Sidpiet
Quote from: Sidpiet on 2026/03/12, 20:39:35
Hi ro_sid,
Quote
Make a file with a name to your liking ending in .conf (e.g. ardour.conf or 99-ardour.conf) and put it into the /etc/sysctl.d directory.
works! I put it in the /etc/sysctl.conf before, which not did the trick!
Systemds(!) sysctl does
not evaluate
/etc/sysctl.conf :(.
Quote
Thank you!
Kind regard
Sidpiet
You are very welcome.