Re: [proaudio] pam rlimits aware setup

[Frieder Bürzele <evermind@xxxxxxxxxxxxx>]

Dominique Michel wrote:
> Check at you are in the audio group:
> # cat /etc/group
>
> If not, add yourself:
> # useradd -G audio username
>
> Check the permission of the audio device:
> # ls -l /dev/dsp* /dev/mixer*
> lrwxrwxrwx  1 root root  9 mai 17 15:55 /dev/dsp -> sound/dsp
> lrwxrwxrwx  1 root root 10 mai 17 15:55 /dev/dsp1 -> sound/dsp1
> lrwxrwxrwx  1 root root 10 mai 17 15:55 /dev/dsp3 -> sound/dsp3
> lrwxrwxrwx  1 root root 11 mai 17 15:55 /dev/mixer -> sound/mixer
> lrwxrwxrwx  1 root root 12 mai 17 15:55 /dev/mixer1 -> sound/mixer1
> lrwxrwxrwx  1 root root 12 mai 17 15:55 /dev/mixer2 -> sound/mixer2
> lrwxrwxrwx  1 root root 12 mai 17 15:55 /dev/mixer3 -> sound/mixer3
>
> If you don't have something like this:
> # chgrp audio /dev/dsp* /dev/mixer*
> (You may need to check udev rules if using udev, otherwise it will not work after a reboot)
>
>   
this is what I get, but these are just symlinks so no real permissions
see below my real-permissions

***root@crazyfury (39 /etc/pam.d) $ ls -l /dev/dsp* /dev/mixer*
lrwxrwxrwx 1 root root  9 18. Mai 14:34 /dev/dsp -> sound/dsp
lrwxrwxrwx 1 root root 10 18. Mai 14:34 /dev/dsp1 -> sound/dsp1
lrwxrwxrwx 1 root root 10 18. Mai 14:34 /dev/dsp2 -> sound/dsp2
lrwxrwxrwx 1 root root 10 18. Mai 14:34 /dev/dsp3 -> sound/dsp3
lrwxrwxrwx 1 root root 11 18. Mai 14:34 /dev/mixer -> sound/mixer
lrwxrwxrwx 1 root root 12 18. Mai 14:34 /dev/mixer1 -> sound/mixer1
lrwxrwxrwx 1 root root 12 18. Mai 14:34 /dev/mixer2 -> sound/mixer2
lrwxrwxrwx 1 root root 12 18. Mai 14:34 /dev/mixer3 -> sound/mixer3
lrwxrwxrwx 1 root root 12 18. Mai 14:34 /dev/mixer4 -> sound/mixer4

real permissions
***root@crazyfury (39 /etc/pam.d) $ ls -l /dev/sound/dsp* /dev/sound/mixer*
crw-rw---- 1 root audio 14,  3 18. Mai 14:34 /dev/sound/dsp
crw-rw---- 1 root audio 14, 19 18. Mai 14:34 /dev/sound/dsp1
crw-rw---- 1 root audio 14, 35 18. Mai 14:34 /dev/sound/dsp2
crw-rw---- 1 root audio 14, 51 18. Mai 14:34 /dev/sound/dsp3
crw-rw---- 1 root audio 14,  0 18. Mai 14:34 /dev/sound/mixer
crw-rw---- 1 root audio 14, 16 18. Mai 14:34 /dev/sound/mixer1
crw-rw---- 1 root audio 14, 32 18. Mai 14:34 /dev/sound/mixer2
crw-rw---- 1 root audio 14, 48 18. Mai 14:34 /dev/sound/mixer3
crw-rw---- 1 root audio 14, 64 18. Mai 14:34 /dev/sound/mixer4

   Frieder


> Which sound card are you using?
> Dominique
>
> Le Wed, 17 May 2006 22:47:33 -0500,
> "Colin Shapiro" <cmshapiro@xxxxxxxxx> a écrit :
>
>   
> > > up to now I was forced to use a non-rt kernel because using reiser4 as
> > > filesystem, but now I've added successfully reiser4 to rt-sources.
> > > pam setup fails anyway
> > > this is what jackd gives me
> > >
> > > $ jackd -R -d alsa
> > >
> > > jackd 0.100.7
> > > Copyright 2001-2005 Paul Davis and others.
> > > jackd comes with ABSOLUTELY NO WARRANTY
> > > This is free software, and you are welcome to redistribute it
> > > under certain conditions; see the file COPYING for details
> > >
> > > JACK compiled with System V SHM support.
> > > loading driver ..
> > > Enhanced3DNow! detected
> > > creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit
> > > control device hw:0
> > > [snip]
> > > cannot use real-time scheduling (FIFO at priority 20) [for thread
> > > -1228706896, from thread -1228706896] (1: Operation not permitted)
> > > cannot use real-time scheduling (FIFO at priority 10) [for thread
> > > -1237099600, from thread -1237099600] (1: Operation not permitted)
> > >
> > >
> > >       
> > Well, that's definitely a permissions issue.
> >
> > If it helps at all, I can say that the default rlimits values that I posted
> > earlier work for me.  I don't have realtime-lsm installed, and I can run
> > jackd in realtime mode without any issues.
> >
> > I just recently recompiled all my audio tools from source (to get the latest
> > CVS updates), so all my packages are up-to-date.  That might not mean
> > anything, but it's worth mentioning.
> >
> > - Colin
> >     
>
>