On Tue, Sep 30, 2014 at 11:40 AM, Armin Steinhoff <armin@xxxxxxxxxxxx> wrote: > a "pthread_setschedparam" call of the code below terminates with an > errno == 1 ... means "Operation not permitted" At risk of asking the obvious: are you running as root, or does the user running this code have RT priorities? User priorities controlled by /etc/security/limits.conf : you can set a groups max-rtprio like so: @audio - rtprio 65 > KERNEL_EVENT_THREAD_PRIORITY is 55! > How to solve that problem ? Anything above 50 requrires changing limits.conf or root IIRC. HTH, -Harry -- www.openavproductions.com -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html