added this lines to the end of /etc/security/limits.conf

===

@audio   –  rtprio     99

@audio   –  memlock    unlimited

@audio   –  nice      -10

===

sudo usermod -a -G audio MY_USER_ID

On Wed, Dec 23, 2015 at 2:01 AM, Jonghyun Kim <agitato816@gmail.com> wrote:

however, no sound problem, no bad messages on qjackctl.

On Wed, Dec 23, 2015 at 1:54 AM, Jonghyun Kim <agitato816@gmail.com> wrote:

hi list,

JACKerror: Cannot use real-time scheduling (RR/0)(22: Invalid argument)

JACKerror: JackClient::AcquireSelfRealTime error

this errors occurs every pd variants on my system: pd-vanliia 0.46-7, 0.45-4, pd-extended 0.43-4, but no errors with pd-l2ork 20151219(based on pd 0.42? i guess?).

my system:

ubuntu 14.04-3 LTS 64 bit

jackdmp 1.9.10

qjackctl 0.3.10

thanks,

jonghyun kim