On Saturday 30 December 2006 17:53, Ronny Standtke wrote:
> Hi all,
>
> I have a normal desktop PC with an on-board soundcard, a webcam
> and an USB headset for IP telephony that runs Debian testing.
> All three are detected as soundcards:
> $ cat /proc/asound/cards
>  0 [I82801DBICH4   ]: ICH4 - Intel 82801DB-ICH4
>                       Intel 82801DB-ICH4 with AD1980 at
> 0xeb000000, irq 217 1 [Headset        ]: USB-Audio - Logitech
> USB Headset Logitech Logitech USB Headset at
> usb-0000:00:1d.0-2, full speed
>  2 [U0x46d0x8ce    ]: USB-Audio - USB Device 0x46d:0x8ce
>                       USB Device 0x46d:0x8ce at
> usb-0000:00:1d.7-4, high speed
>
> Sometimes I unplug the headset and/or the webcam to use the USB
> port for something else, e.g. an USB flash-memory stick.
>
> The problem is, that the order of these devices is not static
> between reboots. This way KDE sometimes uses the headset for
> sound output. Sometimes KDE even tries to use the webcam as
> sound output even though it only has a microphone and gives me
> an error message at startup that it can not open the sound
> device.
>
> So, how do I configure KDE to always use the on-board
> soundcard!?
>

Providing the drivers for your sound devices are modules you can 
force the device order in modprobe.conf with the install command. 
Man modprobe.conf will give you more information.

Joerg
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