Sound: Center and Subwoofer don't work

[NullDevice]

Hi,

I have an NForce2 mainboard and this soundstorm-Sound. I think its called AC97.

With the module that is in the kernel (snd_intel_8x0) i have only front 2 speakers working. If i do "duplicate front" in alsamixer i hear the rear ones too. No subwoofer and no center speaker working.

If i boot windows everything works fine, so the hardware is not damaged or broken.

Then, i downloaded the newest Nvidia driver. I installed and loaded the nvsound module. Well, now 4 speakers are working. No subwoofer, no center again.

I played around with alsamixer and nvmixer for days. No result.
What am i doing wrong?


lspci
...
0000:00:05.0 Multimedia audio controller: nVidia Corporation nForce MultiMedia audio [Via VT82C686B] (rev a2)
0000:00:06.0 Multimedia audio controller: nVidia Corporation nForce2 AC97 Audio Controler (MCP) (rev a1)
0000:00:08.0 PCI bridge: nVidia Corporation nForce2 External PCI Bridge (rev a3)
...

lsmod
Module Size Used by
snd_rtctimer 2448 0
snd_pcm_oss 48288 0
snd_pcm 83528 1 snd_pcm_oss
snd_timer 21700 2 snd_rtctimer,snd_pcm
snd_page_alloc 7620 1 snd_pcm
snd_mixer_oss 17664 1 snd_pcm_oss
snd 46884 4 snd_pcm_oss,snd_pcm,snd_timer,snd_mixer_oss
nvsound 1538328 1
ntfs 105648 1
w83781d 33128 0
i2c_sensor 2944 1 w83781d
i2c_nforce2 5504 0
forcedeth 16640 0
3c59x 38248 0

I have Debian (Sid) Linux. I tried different kernels: 2.6.8, 2.6.9 and today 2.6.11.4. I compiled all the alsa stuff as modules, and the OSS emulation stuff. But i did not compile OSS at all. Did i do anything wrong?

NullDevice

[walternvidia2]

Hi there,
first don't be excited because I won't help you ...
Just to mention that I have EXACTLY the same issue as you described (actually I first thought it was my post),. I posted a very similar request for help on the nvidia forum but never got any answer... tried it all > alsa / nvaudio, mixers, kernel... gave up, I was wasting too much time.
May be if enough people post exactly the same requests the NV guys will react ??? who knows. In the mean time I will try alsa on the new machines I bought, they have 7.1 sound (asus boards).

Good luck!

[xin]

Same problem here.

Tried everything. Some combinations of options with surround51 or surround40 drivers caused the center channel to be the rear channel but I never got everything working as it should.

I'm using an Asus A8N-SLI Deluxe board with on-board 7.1 sound.

[chareos]

Just to say,
Got everything working on nForce4 (6 audio out) with standard alsa drivers (with oss emu) from kernel. I had to connect center+subwoofer to microphone plug and switch to it accordly from gnome volume settings.

[xshakma]

Hi chareos,

how do you get it to work with alsa? I think it's an oss driver.

(or you didn't install nforce? )

[chareos]

I don't use nforce. Just plain kernel drivers. Everything works well
(except that with the workaround I mentioned above, I'll be in trouble when trying to use teamspeak or similar... cause I've the mic jack used for center-subwoofer)