On Jan 23 2024, at 1:35 pm, Arve Barsnes <arve.barsnes@gmail.com> wrote:
# ls -l /dev/rtc0
crw-rw---- 1 root audio 253, 0 Jan 10 20:00 /dev/rtc0
# grep audio /etc/security/limits.conf
@audio - rtprio 99
@audio - memlock unlimited

A historical accident that "realtime clock" and "realtime scheduling" have the same term.  The rtc is not needed for realtime scheduling, so you do not need to assign audio group permission.

Can you show the output of `ulimit -a` to display the permissions currently active for your logged in account?

-- Chris Caudle