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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