Cannot start jack as normal user

nobody · Joined: Mar 09, 2008 Posts: 1687 Location: Not here

Using the same command-line args, I can start jackd as root, but not as a normal user.

/usr/bin/jackd -R -dfreebob -r48000 -p1024 -n3 -D

wmonk · Posted: Fri Jan 22, 2010 5:41 pm Post subject:

You should add yourself to the audio group. Run as root:

nobody · Joined: Mar 09, 2008 Posts: 1687 Location: Not here

Thanks, wmonk. That doesn't help and I don't know why, but in addition to adding myself to the audio group, I've had to do other things. I've solved it here, if anyone else is interested. I'd also love to hear from anyone who knows what I should do differently.

http://forums.gentoo.org/viewtopic-t-812246-highlight-.html?sid=ff8eec519939b14e54aff1db1e96856a

wmonk · Posted: Sat Jan 23, 2010 4:42 am Post subject:

Ah, gentoo has a different realtime group. Didn't know that.
If it stil doesn't work edit the file:
/etc/security/limits.conf
And add:

nobody · Joined: Mar 09, 2008 Posts: 1687 Location: Not here

I had different values for rtprio and memlock. I changed them. This is my entire limits.conf:

wmonk · Posted: Sat Jan 23, 2010 5:32 pm Post subject:

No it isn't. But with those settings you should be ok. Does it work? Hope you'll do some nice linux audio things. Keep me posted! Smile

Cheers,
Wmonk

nobody · Joined: Mar 09, 2008 Posts: 1687 Location: Not here

Well, it only works if I set permissions manually on /dev/shm as root every time I boot up. But I was thinking of writing a bash script to prep the computer for audio by doing this, as well as shutting down services not needed for audio such as apache, mysql, webmin, fcron, etc. Then another bash script to turn them all back on when I need the computer for other things.

I'll definitely post here when I produce works from Linux. Right now, I'm still going through a list of software I want and debugging/fixing ebuilds in the pro-audio overlay.

nobody · Joined: Mar 09, 2008 Posts: 1687 Location: Not here

Well, it only works if I set permissions manually on /dev/shm as root every time I boot up. But I was thinking of writing a bash script to prep the computer for audio by doing this, as well as shutting down services not needed for audio such as apache, mysql, webmin, fcron, etc. Then another bash script to turn them all back on when I need the computer for other things.

I'll definitely post here when I produce works from Linux. Right now, I'm still going through a list of software I want and debugging/fixing ebuilds in the pro-audio overlay.

wmonk · Posted: Sun Jan 24, 2010 10:10 am Post subject:

Do you run PulseAudio? That can cause some problems.
And did you install the real-time kernel?

nobody · Joined: Mar 09, 2008 Posts: 1687 Location: Not here

Nope to Pulseaudio and yep to RT kernel (rt-sources on Gentoo). I may have to tweak some things, though. I also plan to upgrade my computer with more RAM. It'll hold up to 16 GB, and I plan to eventually max it out and maybe use ramdisks for audio.

fengland · Joined: Feb 18, 2010 Posts: 50 Location: Burlington, VT

you can always throw stuff to run on startup in /etc/rc.local and it will get run - there's some fancy way to set permissions with some udev configuration file or something, but I usually just put stuff like that in rc.local. I'm lazy though and usually run all my audio stuff as root.

nobody · Joined: Mar 09, 2008 Posts: 1687 Location: Not here

I'd forgotten about this thread. Way back in January!

I have things running nicely with JACK now, especially since discovering the joys of jackdbus. Plus, a new machine with a Phenom II x6. Cool