[ubuntu-studio-devel] Feature Spec discussion: Realtime Privilege and access to ffado devices

[ttoine]

+1 for your 2 ideas. We need to use realtime group !


Antoine THOMAS
Tél: 0663137906


2014-05-18 11:41 GMT+02:00 Kaj Ailomaa <zequence at mousike.me>:

> We should do something about how realtime privilege is administered.
>
> Currently, the upstream Debian package jackd installs a file, giving
> members of audio group access to tuned "rtprio" and "memlock", at
> /etc/security/limits.d/audio.conf. Also, access to ffado drivers is done
> from /lib/udev/rules.d/60-ffado.rules, also giving audio group the right
> to use a set of ffado supported devices. This all works fine in Debian,
> since the user is in audio group by default. Not on Ubuntu though, since
> the group is used for other things.
>
> I would prefer that installing jackd would give the user realtime
> privilege the same way on any Debian derived system, and since audio
> group is out of the question, we should look at other alternatives.
>
> A couple of ideas:
>  * introduce two new groups and make sure both Debian and Ubuntu
>  introduces them. Name them "jack" and "ffado".
>  * Make jack use rt-kit. (We still need a way for jack to get access to
>  ffado devices though)
>
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