They most likely have different group ids then.
The default for a useradd in Fedora and I think
most distributions is to create a group identical
to the user name, and that gets assigned as the user's
primary group.

On Thu, 2006-01-26 at 11:51 -0800, Josh Coffman wrote:
> 
> --- Scott <spbz@cox.net> wrote:
> > Josh Coffman wrote:
> > 
> > >Something I haven't gotten working in my FC4 is
> > >allowing multiple simultaneous sessions to share
> > >devices such as sound or dvd/cdrw.
> > >
> > >I'd like to allow my kids to switch to their own
> > >session without logging off my wife or myself.
> > That's
> > >no problem, but then things like sound or dvd
> > access
> > >doesn't work because the devices are already under
> > the
> > >control of the first user.
> > >
> > >I'm pretty sure this is permissions thing, but I
> > don't
> > >know where/how to adjust this. Anybody know how to
> > do
> > >this?
> > >
> > >Thanks
> > >
> > >
> > >Shin zen ni rei
> > >-j
> > >Registered Linux user number 403109
> > >  http://counter.li.org/
> > >  
> > Josh,
> > 
> > It shouldn't be a problem as long as they're in the
> > same group (I think 
> > it's the audio group, at least, that's what it is in
> > Debian) and as long 
> > as whatever program is running in another session
> > that grabs the audio 
> > device is shutdown.  If that isn't a possibility,
> > then perhaps a sound 
> > daemon such as esound or artsd could be used.  If
> > you've got a few 
> > bucks, the SoundBlaster Live! is an excellently
> > supported soundcard that 
> > has multiple hardware DSP's so that you can run
> > multiple audio programs 
> > without the use of a software sound daemon.
> > 
> > -Scott
> 
> Having tried to do it before, I know I get an error
> about no sound device available on the second+ logins.
> I think I checked dmesg to find it was a device
> permissions thing and tried to correct it in config,
> but gave up when my first try didn't work. Had more
> important things at the time.
> 
> I'm also not sure I setup the users with the right
> group memberships. I just entered a username/password
> and moved on since  I was just getting into linux when
> I first setup FC4. (tried several distros but not
> doing this.)
> 
> 
> Shin zen ni rei
> -j
> Registered Linux user number 403109
>   http://counter.li.org/
>   
> 
> 
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