Audio no longer feasible with vanilla Ubuntu + Studio packages (?)

Jeremy Jongepier jeremy at
Mon Oct 11 20:03:18 BST 2010

On 10/11/2010 08:36 PM, Ronan Jouchet wrote:
> On Mon, Oct 11, 2010 at 2:09 PM, Brian David<beejunk at>  wrote:
>> Also, you should not be using limits.conf anymore.  JACK will create
>> /etc/security/limits.d/audio.conf, and that is the one that should be used
>> to adjust settings.  I think it might cause trouble if these settings are
>> listed in both limits.conf and audio.conf
>> What kind of interface are you using?
>> -- Brian David
> Howdy,
> TToine: yes I added myself to the audio group (that's what "the usual
> setup in groups" meant in my extremely imprecise original mail :P )
> Brian, yay! You're right these settings were in
> /etc/security/limits.d/audio.conf (thanks to jackd2's dpkg install
> procedure, am I right?) but I also added them manually in
> /etc/security/limits.conf . Seems to work fine after restoring
> limits.conf. And sorry if the following questions have already been
> answered, but:
>   a. is audio.conf new to jack2?

No, it's new as of Lucid. The origin of this change is in Debian.

>   b. why this change?

Ask the Debian packagers. Probably because it complies better with 
conventions. Don't ask me which conventions, don't have the faintest clue ;)

>   c. should we leave limits.conf alone now?

Make your changes in /etc/security/limits.d/audio.conf to prevent any 
future problems.

> I am using an Edirol FA-66. And while we're at it, now seems a good
> time to empty my bag of related questions:
>   d. I read about changes in the firewire stack (different kinds of
> /dev beasts used now). Do they concern all firewire cards, and what is
> their impact?

Yes, concerns all cards. It's a complete rewrite afaik.

>   e. is adding the user to the "disk" group still required?

No idea, haven't used/tested the new Juju stack yet, afaik this is not 
necessary anymore. But then it wasn't required with the old stack 
either, you'd better use the audio or video groups for that.

>   f. under lucid, in order to get jack to start I often had to modprobe
> raw1394&&  chmod a+rw /dev/raw1394 . Under Maverick I no longer need
> this, is this thanks to the new firewire stack, some kind of new auto
> setup, or the powerz of keyboard cat playing during a full moon night?

modprobing and chmodding isn't necessary at all when you use the Ubuntu 
Studio Controls or add the raw1394 module to your /etc/modules and 
create a /etc/udev/rules.d/50-raw-firewire-permissions.rules manually.

> Thanks everybody for your grrreat help!
> Ronan



More information about the Ubuntu-Studio-devel mailing list