Hi I am trying to make the sound work on a ASUS M2NPV-VM but I unable to. I Read somewhere that there is bug, a high pitch sound produced by this sound subsystem (HDA Nvidia MCP51). But I unable to even heard any sound, let alone a high pitch one ! I have tryied to mess with alsamixer but with no luck.

Thanks,

Carlos Vaz

Hi,

You could as root, try running alsaconf to rediscover the sound hardware. Then if successful, run alsamixer which should open a menu of sliders and (m)ute buttons. alsamixer will run as root or mythtv.

Mike

Thanks, mjl !
It is working now but with a small delay between sound and lips syncronization like in those old and bad chinese kung fu movies !!. My hardware is not the culprit. I have an Atlhon X2 4200+ AM2 with 2 GB of RAM and a 160 GB HDD.

Thanks,

Carlos Vaz.

Type of tuner card? With certain types it's a common newbie thing to have the wrong audio sources unmuted. In this case the sound would be ahead of the picture.

Other than that look at the audio sync options in the setup screens accessible from the main menu: setup&utilities->setup->tv settings->playback also try ..->general

Sorry, I forgot the most important info:

WinFast TV2000 XP Expert

http://www.leadtek.com.tw/eng/tv_tuner/ ... onameid=93

I will follow your advice when I arrived at home tonight.

Thanks,

Carlos Vaz.

Yep, this one is a FAQ. You need to mute the audio input/source that you're recording from and unmute the (usually PCM) soiurce for the playbaqck audio.
http://www.ibiblio.org/pub/Linux/docs/H ... /BTTV.html

You can do this by opening a shell session (I think you may need to become root too) and running "alsamixer". Remember that "inputs" here are relative to the mixer on the sound card. Even though the PCM audio signal generation is on the audio card, it's on the source (versus the output) side of the internal mixer.

I am having the same problem with my M2NPV-VM. I have tried the noapic trick in lilo, and putting "options snd-hda-intel position_fix=1 model=3stack" into /etc/modprobe.d/alsa-fix
http://blog.thedebianuser.org/?p=155

However nothing has fixed the problem.
Alsamixer never remembers the volume and mute settings after a reboot.
Sometimes I do get sound with the highpitched beep that others have reported but then it stops.

Anyone have an idea?

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Paul Turpie
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Minor Progress:
I have found that if straight after bootup I run alsamixer raise volumes and unmute outputs, then I get sound with the right channel fine and the annoying tone through the left channel.

Any ideas as to why alsamixer's settings are not being kept over a reboot. On my old motherboard I didn't need to do anything to "save" the mixer settings, the system remembered them automatically.

I have now tried putting the extra moduule options into /etc/modutils/alsa-fix aswell as /etc/modprobe.d/alsa-fix and have run update-modules, but that hasn't fixed it. How can I tell if these options are actually being accepted and used?

Alsa how can I tell if my lilo changes (noapic) were accepted?

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Paul Turpie
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Major progress!
I have updated alsa to 1.0.13 and now the audio seems to be working fine.

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Paul Turpie
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could you post how you went about upgrading alsa?

thanks...

I followed some instructions I found somewhere here in the forum. Similar to this post http://mysettopbox.tv/phpBB2/viewtopic. ... +alsa+wget

a) open a term window (i.e. Alt-x),
b) become super-user (su)
c) cd /usr/src
d) wget ftp://ftp.alsa-project.org/pub/driver/a ... c2.tar.bz2
e) tar jxvf alsa-driver-1.0.13.tar.bz2
f) cd alsa-driver-1.0.13
g) ./configure
h) make
i) make install

I also upgraded all of the other parts of Alsa, like the libraries and utils, at the same time, because I couldn't be bothered mucking around with just doing one at time and more testing. See the list on their homepage at http://www.alsa-project.org/

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Paul Turpie
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After following these instructions it still tells me i have alsa 1.10.12rc2

i will dl the utills and other stuff for it later...