Re: [LAD] Jackd & Real Time Kernel

Try renaming it to audio.conf and relogin.

On Sat, 13 Jan 2018 14:58:28 +0000
Benny Alexandar <ben.alex@email-addr-hidden> wrote:

> Hi Len,
>
> I'm using jackdmp 1.9.12. I checked the
> file /etc/security/limits.d/audio.conf, and is named as
> audio.conf.disabled. How to enable this ?
>
> When I run my jack client standalone program, I could see the prints
> as follows,
>
> ------------------
> jackdmp 1.9.12
>
> JACK server starting in realtime mode with priority 10
> self-connect-mode is "Don't restrict self connect requests"
> Cannot lock down 82280346 byte memory area (Cannot allocate memory)
> creating alsa driver ...
> hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit configuring for
> 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods ALSA:
> final selected sample format for capture: 32bit integer little-endian
> ALSA: use 2 periods for capture ALSA: final selected sample format
> for playback: 32bit integer little-endian ALSA: use 2 periods for
> playback Cannot use real-time scheduling (RR/10)(1: Operation not
> permitted) AcquireSelfRealTime error
> Cannot lock down 82280346 byte memory area (Cannot allocate memory)
> JACK server started
> Cannot use real-time scheduling (RR/5)(1: Operation not permitted)
> JackClient::AcquireSelfRealTime error
> -----------------------------------
>
> -ben
>
>
>
> ________________________________
> From: Len Ovens <len@email-addr-hidden>
> Sent: Friday, January 12, 2018 10:27 PM
> To: Benny Alexandar
> Cc: linux-audio-dev@email-addr-hidden
> Subject: Re: [LAD] Jackd & Real Time Kernel
>
> On Fri, 12 Jan 2018, Benny Alexandar wrote:
>
> > I just compiled simple_client.c and things starts to work.
> > My doubt is do I need to install linux real-time kerel update for
> > JACK.
>
> It depends... personally, I use the lowlatency kernel with no problems
> using an ice1712 based PCI card audio interface. Your situation may
> differ.
>
> > How do I know if jack is running real time, is it by checking for
> > xruns ?
>
> Jack runs in real time mode by default. If you are running jackd2
> (version 1.9*) then check ~/.log/jack/jackdbus.log
>
> for the line:
> Thu Dec 28 10:38:26 2017: JACK server starting in realtime mode with
> priority 10
>
> Otherwise the same line will appear in jackd terminal output when
> started.
>
> Do note that part of the jackd instalation process sometimes gets
> missed by some installers. There should be a file
> /etc/security/limits.d/audio.conf If this is missing or named as
> disabled, you may not be able to get jackd to start in realtime mode.
> The two lines of importance in that file are:
> @audio - rtprio 95
> @audio - memlock unlimited
> Depending on your distro the group may be other than audio.
> Whatever that group is, your user needs to be a part of it. Most
> audio distributions get this right already (even ubuntustudio), but
> non-audio distros generally need this to be fixed. After adding
> yourself to the audio (or whatever) group you will need to logout and
> back in before that will have any effect.
>
> --
> Len Ovens
> www.ovenwerks.net<http://www.ovenwerks.net>
>

-- 
   Joakim
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