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Re: Mixer use kills ALSA

On Wed, 2007-06-20 at 14:26 -0400, Andrew Perrin wrote: 
I am using kernel 2.6.18 with debian testing. My machine is an ASUS 
M2NPV-VM, which contains the following sound hardware:

00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio (rev a2)
         Subsystem: ASUSTeK Computer Inc. Unknown device 81cb
         Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 17
         Memory at fe024000 (32-bit, non-prefetchable) [size=16K]
         Capabilities: [44] Power Management version 2
         Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+ Queue=0/0Enable-
         Capabilities: [6c] HyperTransport: MSI Mapping


Sound works OK from a variety of applications, including alsaplayer, 
realplayer, and mplayer. However, when any application changes a mixer 
setting, sound goes silent until alsa is force-reloaded. Any thoughts?

joehill:/var/log# lsmod | grep snd
snd_hda_intel          19284  2
snd_hda_codec         156032  1 snd_hda_intel
snd_pcm_oss            45344  0
snd_mixer_oss          17984  1 snd_pcm_oss
snd_pcm                81092  4 snd_hda_intel,snd_hda_codec,snd_pcm_oss
snd_seq_oss            34816  0
snd_seq_midi_event      8064  1 snd_seq_oss
snd_seq                55184  4 snd_seq_oss,snd_seq_midi_event
snd_timer              24388  3 snd_pcm,snd_seq
snd_seq_device          8844  2 snd_seq_oss,snd_seq
snd                    53284  11 snd_hda_intel,snd_hda_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_seq,snd_timer,snd_seq_device
snd_page_alloc         10952  2 snd_hda_intel,snd_pcm
I have the same motherboard and i was facing same problem. after searching through google and various linux-related site, I found two steps to solve this problem.

NOTE: install alsa-oss, alsa-utils packages
1.  edit: /etc/modprobe.d/alsa-base
     Add the following line at the end of the file,

     "options snd-hda-intel position-fix=1 model=3stack" (withour quotes)

After step 1, force-restart alsa module and see if it works or not.

2.  edit: /boot/grub/menu.lst
     add "noapic" option at the end of the kernel options.
     reboot the machine. everything should work fine.

-----------------------------------------
Arijit Sarkar
Kolkata, India
'Debian Testing' GNU/LINUX
-----------------------------------------
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