[linux-audio-user] Some various questions about system configuration..

[Dana Olson]

On 2/6/06, Lee Revell <rlrevell at joe-job.com> wrote:
> On Mon, 2006-02-06 at 21:30 -0500, Lee Revell wrote:
> > On Sat, 2006-02-04 at 15:49 -0500, Dana Olson wrote:
> > >
> > > I hope you can get this into Breezy. There is a discussion on this
> > > page as well, where I learned the steps from:
> >
> > It's looking good - Matt Zimmermann has instructed the Ubuntu developers
> > to review and merge the patches.
>
> Since it looks like this is happening the next question is, what do we
> thing is a sane default config.
>
> IMHO it needs to be secure OOTB, but we don't want to make users
> edit /etc/security/limits.conf, I propose that we
> ship /etc/security/limits.conf with the "audio" group set up for
> realtime access, but do not add the default user to this group at
> install time.
>
> If Ubuntu already places the default user in group "audio", I think we
> need to use another group "realtime".
>
> So all that's needed for JACK in realtime mode is "gpasswd -a joeuser
> realtime".
>
> There might also be a good argument that we *do* want to allow realtime
> access to the default user...
>
> Lee


Great work, Lee! Question, did the patch have "rt_prio" or "rtprio" in
it? Not sure if you saw my other email about it, but the official PAM
has "rtprio" and most patches I saw out there had "rt_prio" in one
place, but "rtprio" in another (in the README).

By default, you are in the audio group, so I would propose a realtime
group. It makes sense anyhow, since that's what it is for. Also, the
recommendations I saw elsewhere said rtprio = 99 (some say 100, but
looking at the patch, 99 is the max), nice -10, and memlock I am not
sure about. I set mine to 250000, but others put 4000000 even.

On another note.. I hope that the new Ardour 0.99.1 gets into Dapper
too. It has a lot of maintenance fixes.

Dana