10 Oct
2017
10 Oct
'17
9:11 p.m.
Hi Jeremy,
the file you refer to already exists and "nass" user is already part of the
@audio group.
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(a)autostatic.com>
wrote:
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.
Best,
Jeremy
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