How to blacklist (audio) modules

[tobyc]

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Hello everyone. Could anyone advise how to blacklist modules that are (at the moment) loaded at startup?

I've managed to get my install in a pickle, and the following modules load up at boot:

noname:/home/toby# lsmod | grep "snd"
snd_rtctimer 3660 0
snd_seq_dummy 4292 0
snd_seq_oss 30464 0
snd_seq_midi 8544 0
snd_rawmidi 23072 1 snd_seq_midi
snd_seq_midi_event 7488 2 snd_seq_oss,snd_seq_midi
snd_seq 46736 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_mid i_event
snd_seq_device 8140 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi ,snd_seq
snd_atiixp 18508 1
snd_ac97_codec 88036 1 snd_atiixp
snd_ac97_bus 2688 1 snd_ac97_codec
snd_pcm_oss 39712 1
snd_mixer_oss 16000 1 snd_pcm_oss
snd_pcm 69444 3 snd_atiixp,snd_ac97_codec,snd_pcm_oss
snd_timer 20996 3 snd_rtctimer,snd_seq,snd_pcm
snd 49124 12 snd_rtctimer,snd_seq_dummy,snd_seq_oss,snd_rawmidi ,snd_seq,snd_seq_device,snd_atiixp,snd_ac97_codec, snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
soundcore 9568 2 snd
snd_page_alloc 9992 2 snd_atiixp,snd_pcm
rtc 12788 1 snd_rtctimer

Far too many, and one or more of them block the sound and stop it from working. My solution at the moment is to /etc/init.d stop then rmmod each and every one of them, then only load the ones I need:

modprobe snd-atiixp ; modprobe snd-pcm-oss ; modprobe snd-mixer-oss ; modprobe snd-seq-oss

Then the sound works fine. Its quite a hassle though, and I'd rather just stop all those other snd modules from working in the first place. Debian doesn't seem to use modules.conf anymore, and changing the entries files in /etc/modutils/alsa... doesn't seem to have any effect.

Any advice much appriciated.

[mzilikazi]

Have a look at /etc/modprobe.d/alsa-base-blacklist.

[valemon]

open /etc/modeprobe.d/blacklist and at the end of the file write something like

#blacklist alsa modules
blacklist snd_seq_oss 30464 0
blacklist snd_seq_midi 8544 0
blacklist ....

This should do the trick

[tobyc]

Thanks for the advice guys, much appreciated.

I tried adding the unwanted modules to blacklist and to alsa-base-blacklist, but it had no effect as far as I can tell. LSMOD still lists all modules I posted above.

Any other solutions would be much appreciated, perhaps there is a way to permanently remove these daemons, or I'm missing something crucial!

I added:
blacklist snd_seq_dummy
blacklist snd_seq_midi
blacklist snd_rawmidi
blacklist snd_seq_midi_event
blacklist snd_seq
blacklist snd_seq_device
blacklist snd_ac97_codec
blacklist snd_ac97_bus
blacklist snd_pcm
blacklist snd_timer
blacklist snd
blacklist soundcore
blacklist snd_page_alloc

[tobyc]

Oh, and have found out that /etc/init.d/alsasound restart (run as root) also works to restore sound (do this then unmute in volume mixer). Once this is done the following results from a lsmod | grep "snd"

snd_atiixp 18508 1
snd_ac97_codec 88036 1 snd_atiixp
snd_ac97_bus 2688 1 snd_ac97_codec
snd_pcm_oss 39712 1
snd_mixer_oss 16000 1 snd_pcm_oss
snd_pcm 69444 3 snd_atiixp,snd_ac97_codec,snd_pcm_oss
snd_timer 20996 1 snd_pcm
snd 49124 6 snd_atiixp,snd_ac97_codec,snd_pcm_oss,snd_mixer_os s,snd_pcm,snd_timer
soundcore 9568 2 snd
snd_page_alloc 9992 2 snd_atiixp,snd_pcm

Very odd.