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Old 03-07-2004, 05:47 AM   #1
Wynand1
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Question PCM volume control doesn't work / 5.1


I Have a C-media 8378 sound card. When i use aumix to change the volume of the pcm audio nothig happens. Besides that, I have a 5.1 speaker setup but only get sound from the two front speakers.

How can I fix this ?
 
Old 03-07-2004, 04:50 PM   #2
finegan
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The pcm problem I'm not sure of, but the two speaker problem is in the module. The module allows for different compile time parameters on number of speakers, the default is two. Your distro probably compiled the default, at least that is if we're talking about the OSS module cmpci.o, I'm not certain about the alsa module's tricks.

If its cmpci.o you can recompile the kernel (or just the module), and get it set up for greater then 2.

Cheers,

Finegan
 
Old 03-08-2004, 12:18 AM   #3
Wynand1
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OK..... but I'm a so just how do I do this :
Quote:
If its cmpci.o you can recompile the kernel (or just the module), and get it set up for greater then 2.
 
Old 03-09-2004, 07:23 PM   #4
finegan
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Sorry about the lag in reply... work work work...

Check to see that you are indeed using the oss modules and not alsa...

/sbin/lsmod

and look for cmpci.o, if you're running alsa, then there will be a ton of modules listed with the name alsa in them, should be easy to sort out, if its alsa... well, let's check to make sure under whatever GUI multimedia mixer that it hasn't got the second line out muted. That would be funny, heck check under the mixer even if it is OSS's cmpci.

If its indeed cmpci its not necessary to recompile the whole kernel to just get the changes to the one module. We can just do the modules... see if you have your kernel source installed, it should be about a 150MB directory under /usr/src/ called linux or really... it'll be a symbolic link to a directory called /usr/src/linux-2.4.??

Which ?? Good question. If you haven't got your kernel source on there, no biggie, it'll be in RPM format on the CD, or .tgz... or wait, okay first, what distro?

Also make certain that you've got gcc on there too, the rest of the compiling toys should get installed as dependencies of gcc and the kernel source.

Cheers,

Finegan
 
  


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