I am trying to get guitarix and jack running on the Raspberry Pi 2 (+ Cirrus audio card) with raspbian. When starting jack via qjackctl, I get the errors
Cannot lock down 82278944 byte memory area (Cannot allocate memory)
Cannot use real-time scheduling (RR/10)(1: Operation not permitted)
It seems changes to /etc/security/limits.conf do not apply but to /etc/security/limits.d/audio.conf do.
I tried setting the memory lock size for the user and group:
@audio - rtprio 90 # maximum realtime priority
@audio - memlock unlimited # maximum locked-in-memory address space (KB)
@audio - nice -10
pi - rtprio 90
pi - memlock unlimited
pi - nice -10
From ssh I get a satisfactory result:
pi@raspberrypi ~ $ ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 30
file size (blocks, -f) unlimited
pending signals (-i) 7349
max locked memory (kbytes, -l) unlimited
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 90
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 7349
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
But from the desktop terminal I access via vnc I get
pi@raspberrypi ~ $ ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 7349
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 7349
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
How can the same user have different settings and how do I get rt and memory allocation running on the desktop?
