How to set group of video and audio devices automatically

[Derek Tattersall]

Mikkel L. Ellertson wrote:
> Derek Tattersall wrote:
>   
>> That shouldn't matter. I want to have the owner and group permissions set
>> when the appropriate /dev nodes are created, on boot up or on insertion of
>> the device, independently of who is logged into which terminal. I mostly
>> use kde.
>>
>> This is something of a work in progress. I am setting up a 2 seat, 2
>> graphics card configuration, with one graphics card dedicated to running
>> mythtv, and the other a regular desktop. I want mythtv to own the tv tuner
>> card, and the on board sound card. I want the user logged in at the other
>> terminal to own a usb sound card, and a webcam.
>>
>> I have something that sort of works by setting the permissions in
>> rc.local. The problem with that is that it isn't dynamic. If I unplug or
>> plug in one of the usb devices, I have to manually set the permissions all
>> over again.
>>
>> There should be a way to do this with udev, but I haven't figured out how.
>> Something, maybe in /etc/security/console.perms, is overriding it. I saw
>> some other posts referring to files in /etc/security/console.perms.d, but
>> I can't see any appropriate entries to cover sound or video devices.
>>
>> Any ideas?
>>
>>     
> It makes a big difference, because HAL will change the permissions
> in the GUI mode. It works best when running the Gnome or KDE
> desktop. On the other hand, I believe they are still handled by
> console.perms when using the cli.
>
> Mikkel
>   
So what does HAL do if you have a multi-seat configuration? The 
permissions were all set up correctly before I set up the multi-seat 
configuration. How do I configure HAL?

Derek