[ubuntu-studio-users] Jackd

[Ralf Mardorf]

On Fri, 15 Jul 2016 09:09:31 -0600, Allen Carpenter wrote:
>jack performance is getting worse and worse and has crossed into 
>unusable land with my latest fresh install of 16.04

Concretely? What settings do you use for jackd or jackdbus? What audio
device/s do you use? What kernel do you use? What boot options do you
use? Are you using external MIDI gear?

The output of of

 cat /etc/security/limits.conf;printf "\n\n---\n\n";cat /etc/security/limits.d/audio.conf

should return

  @audio   -  rtprio     99
  @audio   -  memlock    unlimited

a rtprio less than 99 most of the times is idiotic.

Post the output of the above commands and of

  arecord -l; aplay -l; amidi -l

also that of

  /etc/init.d/rtirq status

Nothing should share an irq with your sound card. Assumed something
should do so, then if possible, you need to unbind this device.

Do not use pulseaudio!

Post the output of

  uname -rm

and

 cat /boot/grub/grub.cfg

resp. reduce it to the 16.04 related lines. If you are using another
bootloader post those boot options.

Assumed you're still using a fstab, then post the output of

  cat /etc/fstab

otherwise post the output of the mount options of your systemd settings.

Consider to use   noatime   for audio partitions.

Post the output of

  cat /etc/default/rtirq

the output of

  cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

must return   performance   or "no such file or directory".

If it returns something different than run

 echo performance|sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

and check again. If it returns "no such file or directory" we need to
take a look at the kernel config.

Regards,
Ralf