[LAU] changing ulimit from rc.local in order to start audio scripts from there
athanasios.silis at gmail.com
Tue Oct 10 19:11:39 UTC 2017
the file you refer to already exists and "nass" user is already part of the
Are you implying that limits could be raised even without uncommenting the
line in /etc/pam.d/su:
# session required pam_limits.so
BTW this is indeed what make it all work. Thank you :)
On Tue, Oct 10, 2017 at 10:16 AM, Jeremy Jongepier <jeremy at autostatic.com>
> Hello Athanasios,
> On 10/09/2017 08:15 PM, Athanasios Silis wrote:
> > Hi there,
> > I have setup an audio system around jackd based on ubuntu studio (14.04
> > LTS). I have written various scripts to setup jackd and clients. It is
> > tested and up running. Now I would like to add a cmd in rc.local in order
> > for the whole system to be brought up at boot.
> > I tried
> > #set limits
> > su - nass -c "ulimit -r 95 -l unlimited" 2>&1 | tee -a /tmp/audio.log
> > #verify limits
> > su - nass -c "ulimit -r -l" 2>&1 | tee -a /tmp/audio.log
> > #boot audio stuff
> > su - nass -c "cd /home/nass/audio_setup/scripts ; bash ./cmdaudio start"
> > 2>&1 | tee -a /tmp/audio.log
> > However the ulimit "set" command fails with message
> > ulimit: real-time priority: cannot modify limit: Operation not permitted
> > I read that ulimits are not ready yet at this time. Is there a way to
> > forcefully "bring them up" in order to have them set for the user "nass"
> > before starting the audio scripts ??
> Try uncommenting the following line in /etc/pam.d/su:
> # session required pam_limits.so
> Reboot and your script should work. I would advise you though to not set
> limits this way but to add the nass user to the audio group and check if
> /etc/security/limits.d/audio.conf exists. If it doesn't then run sudo
> dpkg-reconfigure jackd2 and answer yes to the question if you want to
> use JACK with realtime settings.
> Linux-audio-user mailing list
> Linux-audio-user at lists.linuxaudio.org
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