Forcing PCI card to be 0 and USB to be 1

Ceniza · n00b Joined: 30 May 2008 Posts: 26

Hi,

I got an USB webcam recently which comes with a microphone. Enabling USB audio recognizes it as a sound device as well, and it's listed and it works. The problem is that I do not want the USB camera to take slot 0 for the sound card. It is actually causing me problems, specially when I want SPDIF passthrough to work. By specifying card 1 by name in .asoundrc I am able to get every program to use it for output by default, but SPDIF won't work. If I try to force a program like SMPlayer to use it, all I get is noise. What I do really want is my PCI card to take slot 0, but no matter what I try, it keeps getting slot 1.

I have been checking ALSA documentation and other posts, but the given solution does not work for me. They all suggest to specify this in /etc/modules.d/alsa.conf, and I did it as follows:

tgR10 · Posted: Fri Feb 12, 2010 6:58 pm Post subject:

did you have a look at this tread https://forums.gentoo.org/viewtopic-t-758135-highlight-.html ?
i've got identical situation :) audigy2 + webcam with built-in microphone

Ceniza · n00b Joined: 30 May 2008 Posts: 26

I moved alsasound from boot to default as suggested in the thread, and I used your alsa.conf as well. Then, I ran update-modules and restarted. The end result was the same: USB 0 and PCI 1. I am tempted to think that something else is messing with it.

Do you have coldplug enabled? Are you using the ALSA in the kernel? I do for both, and it's not working that way. I am not sure if they may be the reason for it either.
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tgR10 · Posted: Fri Feb 12, 2010 7:55 pm Post subject:

i don't have coldplug, i do use alsa in kernel, audigy(snd10k1) is built-in and usb-audio is buitl as an module
and in my case i got alsasound in boot runlevel because i didn't built snd10k1 as a module
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Hupf · Posted: Fri Feb 12, 2010 11:54 pm Post subject:

If you've compiled one or both audio drivers into the kernel, you have to append the above options to the kernel parameters (in grub.conf), like this:
kernel /boot/vmlinuz snd-emu10k1.index=0 snd-usb-audio.index=1
(notice the dot)

Ceniza · n00b Joined: 30 May 2008 Posts: 26

Thanks for all your help. My last attempt was to include the same information from /etc/modules.d/alsa.conf into /etc/modprobe.d/alsa.conf. Today I started my PC after that change, and now the PCI card is 0 and the USB is 1. Just what I wanted

Hupf: I have compiled both drivers as modules, but I was considering to compile emu10k1 into the kernel as another attempt to get this issue solved. Thanks for your suggestion as well.
_________________
ASUS Rampage III Extreme | Intel Core i7 970 | 3x 2GB DDR3 1600MHz | Geforce GTX480
Gentoo Linux 64 bits | Kernel 2.6.35