[Bug 200523] Re: MCP51 HD Audio not detected in kernel 2.6.24-12-generic

Pekka Pessi ppessi at gmail.com
Sat Apr 26 09:56:52 UTC 2008

*** This bug is a duplicate of bug 200338 ***

The MCP51 mixer gets muted unless you specify correct model option.

The file /usr/share/doc/alsa-base/driver/ALSA-configuration.txt.gz lists
different options for driver snd-hda-intel. For instance, my mobo is
ASUS M2NPV-VM, and model alsa-dig seems to work on it.

You can try different model names until you get mixer unmuted.

Remove snd-hda-intel module and reinstall it with correct "model", e.g.,

sudo rmmod snd_hda_intel
sudo modprobe snd_hda_intel model=alsa-dig

If the module is in use, see which process keeps it open with

sudo lsof /dev/snd/*

and kill the processes.

As permanent fix, add line with correct module option to

options snd-hda-intel model=alsa-dig

Also, make sure that you don't already have an incorrect options line.

MCP51 HD Audio not detected in kernel 2.6.24-12-generic
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