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Maragato
Apprentice
Joined: 10 Mar 2005
Posts: 150
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 Posted: Thu Mar 10, 2005 3:03 am Post subject: Sound Problem With C-Media and 2.4 Kernel |
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Well before you start winning why I dont just use kernel 2.6 I would like to make clear that Ive never compiled a kernel before so I'm afraid of breaking my system. Well I have a C-media sound card and I cant make it work on gentoo so I got no sound ive tryed to emerge alsa but it didnt work. I found no feed back on the docs nor in google so if you managed it to work and can point me a direction I will be very gratefull.
Thanks in advance. |
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leftbas
Tux's lil' helper
Joined: 25 Nov 2003
Posts: 101
Location: Pasadena, Ca
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| Posted: Thu Mar 10, 2005 5:21 am Post subject: Re: Sound Problem With C-Media and 2.4 Kernel |
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| Maragato wrote: | | Well before you start winning why I dont just use kernel 2.6... |
Actually, that was the first thing out of my mouth, so to speak. You know, everybody makes such a big deal out of 'compiling the kernel'. But truth be told, it's really pretty simple, especially if you use genkernel, which I recommend for all noobs. I know, I'm still a noob, too, but I've compiled several kernels now, a couple of 2.4.x and several 2.6.x. Now I'm using 2.6.10 r6, and I love it. It solved a bunch of problems, like USB issues, and my system boots a lot faster. And since ALSA support is built-in, setting up audio is a snap.
And you don't have to worry about breaking your system. As long as you don't delete anything from your current kernel, including the references to it in your bootloader, you can always roll back to whatever version of 2.4 you have right now.
So go for it! Dive into the brave new world of Linux kernel compiling. It's a great learning experience, and pretty much foolproof. I should know, even I could do it.
Good luck 
_________________
"In retrospect, everything is funny."
-- anonymous |
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leftbas
Tux's lil' helper
Joined: 25 Nov 2003
Posts: 101
Location: Pasadena, Ca
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| Posted: Thu Mar 10, 2005 5:24 am Post subject: Re: Sound Problem With C-Media and 2.4 Kernel |
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| Maragato wrote: | | Well before you start winning why I dont just use kernel 2.6... |
Actually, that was the first thing out of my mouth, so to speak. You know, everybody makes such a big deal out of 'compiling the kernel'. But truth be told, it's really pretty simple, especially if you use genkernel, which I recommend for all noobs. I know, I'm still a noob, too, but I've compiled several kernels now, a couple of 2.4.x and several 2.6.x. Now I'm using 2.6.10 r6, and I love it. It solved a bunch of problems, like USB issues, and my system boots a lot faster.
And you don't have to worry about breaking your system. As long as you don't delete anything from your current kernel, including the references to it in your bootloader, you can always roll back to whatever version of 2.4 you have right now.
So go for it! Dive into the brave new world of Linux kernel compiling. It's a great learning experience, and pretty much foolproof. I should know, even I could do it.
Good luck
_________________
"In retrospect, everything is funny."
-- anonymous |
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noergeli
Apprentice
Joined: 05 Oct 2004
Posts: 205
Location: Hamburg, Gemany
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| Posted: Thu Mar 10, 2005 10:52 am Post subject: |
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hello,
as leftbas said, there is no reason to be afraid. It should work with 2.4 kernels nevertheless. I have a terratec card, that is c-media based and it works nice.
It's hard to guess where your problem is. Is sound support activated in kernel? Are all required alsa-packages installed? Is alsa configered correct and started and the required modules loaded? Are the channels unmuted in mixer?
So, make sure you followed the gentoo alsa-guide and tell what problems you run in. This will make it easier to help you. |
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Maragato
Apprentice
Joined: 10 Mar 2005
Posts: 150
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Maragato
Apprentice
Joined: 10 Mar 2005
Posts: 150
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| Posted: Thu Mar 10, 2005 2:14 pm Post subject: |
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This is my /etc/make.conf
| Code: |
# These settings were set by the catalyst build script that automatically built this stage
# Please consult /etc/make.conf.example for a more detailed example
CFLAGS="-O2 -march=athlon-xp -fomit-frame-pointer"
CHOST="i686-pc-linux-gnu"
CXXFLAGS="${CFLAGS}"
GENTOO_MIRRORS="http://www.las.ic.unicamp.br/pub/gentoo/"
[color=red]ALSA_CARDS="cmipci"[/color]
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This is my /etc/modules.d/alsa
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# Alsa 0.9.X kernel modules' configuration file.
# $Header: /var/cvsroot/gentoo-x86/media-sound/alsa-utils/files/alsa-modules.conf-rc,v 1.4 2004/11/16 01:31:22 eradicator Exp $
# ALSA portion
alias char-major-116 snd
# OSS/Free portion
alias char-major-14 soundcore
##
## IMPORTANT:
## You need to customise this section for your specific sound card(s)
## and then run `update-modules' command.
## Read alsa-driver's INSTALL file in /usr/share/doc for more info.
##
## ALSA portion
alias snd-card-0 snd-cmipci
## alias snd-card-1 snd-ens1371
## OSS/Free portion
## alias sound-slot-0 snd-card-0
## alias sound-slot-1 snd-card-1
##
# OSS/Free portion - card #1
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
## OSS/Free portion - card #2
## alias sound-service-1-0 snd-mixer-oss
## alias sound-service-1-3 snd-pcm-oss
## alias sound-service-1-12 snd-pcm-oss
alias /dev/mixer snd-mixer-oss
alias /dev/dsp snd-pcm-oss
alias /dev/midi snd-seq-oss
# Set this to the correct number of cards.
options snd cards_limit=1
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Am I missing something?
noageli how did you managed to make your card work with 2.4? |
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Maragato
Apprentice
Joined: 10 Mar 2005
Posts: 150
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| Posted: Fri Mar 11, 2005 4:39 am Post subject: |
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| Oki xmms is working I but things like licq and amsn make no sound, any suggestions? Im using OSS as output plugin. |
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noergeli
Apprentice
Joined: 05 Oct 2004
Posts: 205
Location: Hamburg, Gemany
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| Posted: Fri Mar 11, 2005 3:17 pm Post subject: |
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Your config file looks good, just one thing: for OSS compatibility uncomment | Code: | | alias sound-slot-0 snd-card-0 |
Note that the c-media does not do hardwaremixing. That means only one app can access your sounddevice, for example xmms may block other apps while playing. Software mixing can be done by using a soundserver like arts or esd (for apps that can use it) or the dmix-plugin for apps that use alsa (search for dmix, there's a howto in Tips & Tricks section).
For the kernel thing: the only sound-related differance between 2.4 and 2.6 is that the alsa-drivers are included in 2.6. But you can also use the external packages with 2.6. It will install the same drivers into the same directories, and i suppose they are the same you are using now.
Switching to 2.6 might give you other advantages, so if you want to do this i don't see any problem with the guide you linked to. And like leftbas said, as long as you keep your 2.4 files you can safely go back.
If you decide to try a 2.6 kernel and you want to stay with the external alsa-packages make sure to only activate core sound-support in kernel (that's also for 2.4, otherwise the kernels drivers will be used) and remerge alsa-drivers like described in point 6 of the upgrade-guide (Reinstalling external modules). |
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