23 Jan
2024
23 Jan
'24
10:59 p.m.
Le Tue, 23 Jan 2024 20:35:39 +0100,
Arve Barsnes <arve.barsnes(a)gmail.com> a écrit :
I'm "suddenly" (after a couple months of
disuse) unable to start jack
in real-time mode, making ardour unable to take advantage of it. I've
had more or less the same setup for more than 10 years, so I've really
forgotten if there is anything else than the below that I could
investigate.
Tue Jan 23 20:21:51 2024: ERROR: Cannot use real-time
scheduling
(RR/10) (1: Operation not permitted)
Tue Jan 23 20:21:51 2024: ERROR: AcquireSelfRealTime error
I recently needed jack real-time mode and got the same error in
addition to another one: "Cannot lock down 107341340 bye memory area".
Adding capabilities to jackd executable file with:
sudo setcap \
cap_sys_resource,cap_ipc_lock,cap_sys_nice=pie \
/usr/bin/jackd
fixed the issue.
Surprisingly, I don't find this trick in any tutorial on the net.
I'm not sure it works in your case, but it might be worth a try.
Yves