[linux-audio-user] kernel- only slightly better...

Lee Revell rlrevell at joe-job.com
Thu Nov 17 21:34:31 EST 2005

On Thu, 2005-11-17 at 18:03 -0800, thewade wrote:
> The best I can do with jack without out more then the 13 initial XRUNS
> is:
> /usr/local/bin/jackd -R -P70 -u -dalsa -dhw:0 -r48000 -p256 -n2 -m -H
> -M
> ...though qjackctl says
> cannot use real-time scheduling (FIFO at priority 69) [for thread 
> -1211757648, from thread -1211757648] (1: Operation not permitted)
> cannot lock down memory for RT thread (Cannot allocate memory)
> the qjackctl statistics window says realtime is enabled.

Your realtime LSM is somehow not working right, as JACK is unable to run
in realtime mode.

Make sure you are really in group 500 (run "groups" and "grep
500 /etc/group").  Check "dmesg | grep -i realtime" to make sure that
the realtime module is being loaded with the correct options.  Also try
unloading realtime LSM and forcibly reloading it from the command line:

# rmmod realtime
# modprobe realtime gid=500


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