Public bug reported:
Was using jackd2 for ages, never had this issue. The usual limits.conf
tweaks are present. Jackd won't run in realtime even as root. It's very
easy to reproduce in Focal.
Before upgrade, was working:
Ubuntu 18.04.4 LTS
uname -r
kernel 5.3.0-51-generic
jackd --version
jackdmp version 1.9.12 tmpdir /dev/shm protocol 8
After upgrade:
Ubuntu 20.04 LTS
uname -r
5.4.0-29-generic
jackd --version
jackdmp version 1.9.12 tmpdir /dev/shm protocol 8
Simple test:
jackd -R -d dummy -r192000 -p2048
jackdmp 1.9.12
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2016 Grame.
Copyright 2016-2017 Filipe Coelho.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
Cannot create RT messagebuffer thread: Operation not permitted (1)
Retrying messagebuffer thread without RT scheduling
Messagebuffer not realtime; consider enabling RT scheduling for user
no message buffer overruns
Cannot create RT messagebuffer thread: Operation not permitted (1)
Retrying messagebuffer thread without RT scheduling
Messagebuffer not realtime; consider enabling RT scheduling for user
no message buffer overruns
Cannot create RT messagebuffer thread: Operation not permitted (1)
Retrying messagebuffer thread without RT scheduling
Messagebuffer not realtime; consider enabling RT scheduling for user
no message buffer overruns
JACK server starting in realtime mode with priority 10
self-connect-mode is "Don't restrict self connect requests"
Cannot use real-time scheduling (RR/10)(1: Operation not permitted)
AcquireSelfRealTime error
I'm guessing that it's not jack itself (package ver. seems to be the
same as bionic, without new feats), smth is missing in the kernel
config. I would try RT kernel, but it usually does not boot at all
thanks to Nvidia blob on that system.
** Affects: jackd2 (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1877129
Title:
jackd won't run in realtime
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/jackd2/+bug/1877129/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
