Arch Linux

WyoPBS

Member

From: Cheyenne, WY

Registered: 2007-10-05

Posts: 101

Website

realtime no longer working

I have a streaming audio show a few times a week using idjc, and up until recently it has worked great.  But suddenly the audio quality has dropped considerably; listeners report that the stream skips and stutters frequently.

Turns out I can no longer set realtime priorities.  What changed?

I read the realtime FAQ:
https://wiki.archlinux.org/index.php/Realtime_for_Users

... and confirmed that my limits.conf file includes the right commands for the audio group, and I am a member of that group.  I don't use a GUI login so I modified /etc/pam/su to require pam_limits; I have no way of knowing whether that has taken effect.  But I do know that when I run a test to see if I can do realtime stuff (chrt 80 echo OK) it tells me, even when I am root, "operation not permitted".

Does anyone here do realtime processing such as streaming audio with any success, and can you tell me what you had to tweak to do it?

Hardware is dual-core Athlon II ~3.0 Ghz with 8GB RAM.

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Peter B. Steiger
Cheyenne, WY