[linux-audio-user] Why jackd can't get realtime?

When running jackd trying to get realtime I get:

$ jackd -R -d alsa
(...)
cannot use real-time scheduling (FIFO at priority 20) [for thread
-1228579920, from thread -1228579920] (1: Operation not permitted)
cannot use real-time scheduling (FIFO at priority 10) [for thread
-1236972624, from thread -1236972624] (1: Operation not permitted)

However I thought everything was set up properly on my Debian sid:

$ uname -r
2.6.19.1-rt15
$ grep PREEMPT_RT /boot/config-`uname -r`
CONFIG_PREEMPT_RT=3Dy
$ dpkg -s libpam-modules | grep Version
Version: 0.79-4
$ tail /etc/security/limits.conf
# there is no way to say "allow locking all memory", 4G should be enough
#
* - rt_priority 0
* - nice 0
#
@audio - rt_priority 100
@audio - nice -10
@audio - memlock 4000000

# End of file

Any ideas welcome.

Cordially, Ismael

-- 
Ismael Valladolid Torres  m. +34679156321
La media hostia           j. ivalladt@email-addr-hidden
http://lamediahostia.blogspot.com/