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avieth
Veteran
Joined: 17 Sep 2004
Posts: 1945
Location: Canada
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 Posted: Tue Dec 12, 2006 9:35 pm Post subject: ALSA Card Order |
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I have two sound devices in my box. One is the sound card, emu10k1, the other is a usb midi keyboard, snd-usb-audio.
I'm using kernel modules, not the alsa-driver package. I have the emu10k1 set to autoload first, and then the usb-audio. For some reason usb-audio is always set to card0, or the default device. I have an alias setting snd-emu10k1 to card-0 in /etc/modules.d/alsa, but it doesn't seem to do anything.
How can I get emu10k1 to be my default device (besides just turning off my keyboard at boot, which works just fine  ) |
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frostschutz
Advocate
Joined: 22 Feb 2005
Posts: 2977
Location: Germany
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| Posted: Tue Dec 12, 2006 9:39 pm Post subject: |
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in /etc/modules.d/alsa
| Code: |
options snd-emu10k1 index=0
...
options snd_ice1712 index=1
...
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HTH |
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VoVaN
l33t
Joined: 02 Jul 2003
Posts: 701
Location: The Netherlands
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| Posted: Wed Dec 13, 2006 2:47 pm Post subject: |
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| frostschutz wrote: | in /etc/modules.d/alsa
| Code: |
options snd-emu10k1 index=0
...
options snd_ice1712 index=1
...
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HTH |
I don't know it it solved the problem for the author, but it doesn't work for me, so I have to load driver for the first card from /etc/modules.d/kernel-2.6. | Code: | | snd-emu10k1 index=0 |
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PaulBredbury
Watchman
Joined: 14 Jul 2005
Posts: 7310
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| Posted: Wed Dec 13, 2006 3:13 pm Post subject: |
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Edit /etc/modules.d/alsa, then run modules-update to recreate /etc/modules.conf
This running of modules-update is a crummy compromise, due to legacy files, apparently  |
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VoVaN
l33t
Joined: 02 Jul 2003
Posts: 701
Location: The Netherlands
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| Posted: Wed Dec 13, 2006 3:27 pm Post subject: |
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| PaulBredbury wrote: | Edit /etc/modules.d/alsa, then run modules-update to recreate /etc/modules.conf
This running of modules-update is a crummy compromise, due to legacy files, apparently |
As I can remember, I've done modules-update after updating files, but probably I just forgot it... Anyway, I'm satisfied with the solution/workaround I'm using at the moment. |
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frostschutz
Advocate
Joined: 22 Feb 2005
Posts: 2977
Location: Germany
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| Posted: Wed Dec 13, 2006 5:31 pm Post subject: |
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The modules autoload workaround is what I was using before, but it repeatedly broke; may be due to other init scripts / dependencies that already caused modules to load, maybe after restarting the alsa init script (which unloads and then reloads all modules on its own, so it may cause a reordering of devices). The above solution seems to work fine for me so far; of course you'll have to change snd_emu10k1 and the like to the drivers / sound card modules you are actually using.
The solution I quoted above is also described in the Linux Kernel / Alsa Driver documentation (/usr/src/linux/Documentation/sound/alsa/ALSA-Configuration.txt). Here is the relevant part of the original documentation:
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The available number of auto-loaded sound cards depends on the module
option "cards_limit" of snd module. As default it's set to 1.
To enable the auto-loading of multiple cards, specify the number of
sound cards in that option.
When multiple cards are available, it'd better to specify the index
number for each card via module option, too, so that the order of
cards is kept consistent.
An example configuration for two sound cards is like below:
----- /etc/modprobe.conf
# ALSA portion
options snd cards_limit=2
alias snd-card-0 snd-interwave
alias snd-card-1 snd-ens1371
options snd-interwave index=0
options snd-ens1371 index=1
# OSS/Free portion
alias sound-slot-0 snd-interwave
alias sound-slot-1 snd-ens1371
----- /etc/modprobe.conf
In this example, the interwave card is always loaded as the first card
(index 0) and ens1371 as the second (index 1).
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In other words, it should work. It does for me; or is it just luck? |
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