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exilian
n00b
Joined: 19 Jun 2004
Posts: 27
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 Posted: Wed Oct 20, 2004 12:14 pm Post subject: C-Media CMI9739/A && alsa |
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Hello,
I managed to intall and configure gentoo so it now runs great, but with one exception which is sound.
1. i cannot regulate volume with mixers...
2. 2 sound cannot be played at the same time...
3. only my front two speakers are working (i have 4.0 and yes i have unmuted)
I'm using kernel 2.6.9 (alsa 1.0.6) with alsa as module. I tried dmix and still not working. I even tried new experimental drivers for intel8x0 (which i use) in 2.6.9 but without success.
| Code: | /etc/asound.conf
pcm.dmixer {
type dmix
ipc_key 1024
slave {
pcm "hw:0,0"
period_time 0
period_size 1024
buffer_size 8192
rate 44100
}
bindings {
0 0
1 1
}
}
pcm.dsp0 {
type plug
slave.pcm "dmixer"
}
pcm.!default {
type plug
slave.pcm "dmixer"
}
pcm.default {
type plug
slave.pcm "dmixer"
}
ctl.mixer0 {
type hw
card 0
}
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| Code: | /etc/modules.d/alsa
# Alsa 0.9.X kernel modules' configuration file.
# $Header: /var/cvsroot/gentoo-x86/media-sound/alsa-utils/files/alsa-modules.conf-rc,v 1.2 2004/07/18 03:40:55 dragonheart 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-intel8x0
## 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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I give up.... |
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abali
n00b
Joined: 19 Sep 2004
Posts: 69
Location: Budapest, Hungary
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| Posted: Wed Oct 20, 2004 9:34 pm Post subject: Re: C-Media CMI9739/A && alsa |
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Welcome to the club. That card is a real piece of shit.
| exilian wrote: | | 1. i cannot regulate volume with mixers... |
Stop looking for solutions, it's impossible. The chip simply lacks hardware support for that. Could be done in software, but ALSA doesn't support that, nor it is planned. ALSA dmix might get its own volume control some time in the future, but that will still suck with stuff that use the OSS emulation like Unreal.
| exilian wrote: | | 2. 2 sound cannot be played at the same time... |
Interesting, that should work. You do not need to specify the "rate" in asound.conf (and it's not 44100 anyway). Not all applications will be able to utilize dmixing, only those that support ALSA (xmms does, for example).
| exilian wrote: | | 3. only my front two speakers are working (i have 4.0 and yes i have unmuted) |
I cannot comment that, I have 2.0. Check the ALSA documentation though, you might have to edit your asound.conf in addition to setting volume levels in the mixer. |
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exilian
n00b
Joined: 19 Jun 2004
Posts: 27
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| Posted: Thu Oct 21, 2004 10:44 am Post subject: |
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i read somewhere that original linux driver from cmedia could regulate volume, but the drivers are only for 2.4 kernel
dont know why dmix isnt working for me... but i have the same problem as many on this form had, sound from gimp and others are played after i stop listening to music.
and alo i tried implanting 4.0 (i saw exemple on net) in asound.conf but alo without success.
do u have to enable asound.conf somewhere meybe??
is there anyway to fix my problem (at least 2 sound at the same time) with some dirty trick? |
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Gergan Penkov
Veteran
Joined: 17 Jul 2004
Posts: 1464
Location: das kleinste Kuhdorf Deutschlands :)
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| Posted: Thu Oct 21, 2004 1:11 pm Post subject: CMedia |
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I have philips sonic edge 5.1. Philips means the card is not linux-compatible, ok i have a hard try googling for this, but what i have found is that this card uses cmedia 8738. I don't know why they are insisting on linux incompatiblity :: ))) ok that was the first step the card worked but only 2 or 4 channels, i thought ok probably it is not fully compatible with linux, i have asked questions about this in the alsa-mailing-lists but alas no answer : (( the problem was that alsa - don't ask me why - uses different connectors for the output ::(( from windows. so try it, probably this one helps. |
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exilian
n00b
Joined: 19 Jun 2004
Posts: 27
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| Posted: Thu Oct 21, 2004 2:17 pm Post subject: |
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| damn.. it was a good suggestion, but there is still no sound from rear speakers. |
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Gergan Penkov
Veteran
Joined: 17 Jul 2004
Posts: 1464
Location: das kleinste Kuhdorf Deutschlands :)
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| Posted: Thu Oct 21, 2004 2:40 pm Post subject: |
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Hi,
the other thing is to try the alsamixer and turn on the four channel mode, if u have one and play with the options::)) I hope this helps, but the resolutions of alsa problems tend to be simple but hard to find, due to lack of information :(( Great coding, but no help and documentation. btw the sound quality with alsa is better than in windows ::))) |
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abali
n00b
Joined: 19 Sep 2004
Posts: 69
Location: Budapest, Hungary
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| Posted: Thu Oct 21, 2004 4:22 pm Post subject: |
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| exilian wrote: | | i read somewhere that original linux driver from cmedia could regulate volume, but the drivers are only for 2.4 kernel |
That's right, C-Media did release some OSS modules which do software volume control, but they are not the way to go. Anyway you can have a look at them here.
| exilian wrote: | | dont know why dmix isnt working for me... but i have the same problem as many on this form had, sound from gimp and others are played after i stop listening to music. |
Okay, let's try to copy exactly the way it works here. Copy this to your ~/.asoundrc and try playing two streams at the same time with alsaplayer. If it works, dmix is fine and your applications need to be tweaked.
| Code: | pcm.dmixer {
type dmix
ipc_key 1024
slave {
pcm "hw:0,0"
}
bindings {
0 0
1 1
}
}
pcm.dsp0 {
type plug
slave.pcm "dmixer"
}
pcm.!default {
type plug
slave.pcm "dmixer"
}
pcm.default {
type plug
slave.pcm "dmixer"
}
ctl.mixer0 {
type hw
card 0
}
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exilian
n00b
Joined: 19 Jun 2004
Posts: 27
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| Posted: Fri Oct 22, 2004 5:06 pm Post subject: |
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finally.. i ran 2 alsaplayer and they both worked. (thx abali)
but how do i make rhytmbox and gaim to work at the same time???
Last edited by exilian on Fri Oct 22, 2004 5:13 pm; edited 1 time in total |
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exilian
n00b
Joined: 19 Jun 2004
Posts: 27
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| Posted: Fri Oct 22, 2004 5:08 pm Post subject: |
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| ntw: why do i have to unmute channels everytime i start computer?? |
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abali
n00b
Joined: 19 Sep 2004
Posts: 69
Location: Budapest, Hungary
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| Posted: Fri Oct 22, 2004 5:39 pm Post subject: |
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| exilian wrote: | | but how do i make rhytmbox and gaim to work at the same time??? |
Tell them to use ESD and tell ESD to use ALSA (put this in /etc/esd/esd.conf):
| Code: | [esd]
auto_spawn=1
spawn_options=-terminate -nobeeps -as 2 -d default -r 48000
spawn_wait_ms=100
# default options are used in spawned and non-spawned mode
default_options= |
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exilian
n00b
Joined: 19 Jun 2004
Posts: 27
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| Posted: Fri Oct 22, 2004 6:26 pm Post subject: |
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thx it works... but
the sound is a little choppy in every app (nothing serious, but annoying)
and my 2 rear speakers still arent working, here is the soultion <a href="http://alsa.opensrc.org/index.php?page=FAQ028">http://alsa.opensrc.org/index.php?page=FAQ028</a> but i dont know how to implant it in asound.conf |
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exilian
n00b
Joined: 19 Jun 2004
Posts: 27
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| Posted: Fri Oct 22, 2004 6:33 pm Post subject: |
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| ooo and why isnt oss using dmix ?? |
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Woody
Guru
Joined: 30 Nov 2002
Posts: 592
Location: Milwaukee
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| Posted: Fri Oct 22, 2004 7:29 pm Post subject: |
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Because it can't. You'll need to use the aoss wrapper:
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exilian
n00b
Joined: 19 Jun 2004
Posts: 27
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| Posted: Sat Oct 23, 2004 10:05 am Post subject: |
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thx..
i figured out what was wrong with dmix. apparently
| Code: | period_time 0
period_size 1024
buffer_size 8192 |
this aren't the right settings for my sound card....
I give up of ever hearing the two rear speakers| but does anyone know why the hell do i have to unmute pcm every time i start computer?? and why is the sound a little chopy? |
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Multimedia
