Sound card conflict with Vid-Capture card ALSA

Optimistic · 01-19-2007, 11:08 AM

As far as I can tell my sound card is conflicting with the Video Capture card after a fresh install of Debian Testing. Everything worked before.

lspci gives:

Code:

00:00.0 Host bridge: Intel Corporation 82845G/GL[Brookdale-G]/GE/PE DRAM Controller/Host-Hub Interface (rev 01)
00:01.0 PCI bridge: Intel Corporation 82845G/GL[Brookdale-G]/GE/PE Host-to-AGP Bridge (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 81)
00:1f.0 ISA bridge: Intel Corporation 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801DB (ICH4) IDE Controller (rev 01)
00:1f.3 SMBus: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 01)
01:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 5200] (rev a1)
02:00.0 Multimedia video controller: Conexant CX23880/1/2/3 PCI Video and Audio Decoder (rev 05)
02:00.1 Multimedia controller: Conexant CX23880/1/2/3 PCI Video and Audio Decoder [Audio Port] (rev 05)
02:01.0 Modem: Broadcom Corporation BCM4212 v.90 56k modem (rev 02)
02:02.0 Ethernet controller: ADMtek NC100 Network Everywhere Fast Ethernet 10/100 (rev 11)
02:08.0 Ethernet controller: Intel Corporation 82801DB PRO/100 VE (LOM) Ethernet Controller (rev 81)
02:0c.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)

My sound card is a 5.1 card with a C-Media chip. And the Video Capture card is a WinTV with the Conexant chip.

I can run alsaconf and the C-Media card shows up and gets configured, but no matter what I do after alsamixer shows:

Code:

Card: Conexant CX8811                                                                                                           
Chip: CX88                                                                                                                      
View: [Playback] Capture  All

I'm really at a loss, and the strange thing is: the sound card was loaded properly once, but after a restart, things reverted back to the Conexant chip being loaded as the sound instead.

HappyTux · 01-19-2007, 11:51 AM

Try creating/modifying the /etc/modprobe.d/sound with this for the contents.

Code:

## Added by me for proper sound card detection

alias snd-card-0 snd-cmipci
options snd-cmipci index=0
alias snd-card-1 snd-cx88-alsa
options snd-cx88-alsa index=1

At least I think I have the right module names in there if not change them to the correct ones then use /etc/init.d/alsa reload and hopefully you will have sound through the card, if it works then these settings will be used on every boot and you should have no more problems.

Optimistic · 01-19-2007, 12:09 PM

Thanks for the tip, HappyTux

but it didn't work

HappyTux · 01-19-2007, 12:35 PM

Quote:

Originally Posted by Optimistic

Thanks for the tip, HappyTux

but it didn't work

That sucks then as much as I hate the idea you did try rebooting to see if it worked with a fresh initialization of everything. Another thing to see if it will help is blacklisting the TV card module to stop it from ever being loaded as the only purpose of having it is if you do not have the cable from TV card line out going into your sound card line in to get your sound. Now you might have to do a search on blacklisting the loading of a module by udev as I don't use it so really have no idea how that works but a quick search here with apt-file suggests looking at putting the module name in the /etc/modprobe.d/blacklist in whatever the correct format for the file would be.

Code:

apt-file list udev | grep black
udev: etc/modprobe.d/blacklist
udev: etc/modprobe.d/blacklist

Optimistic · 01-19-2007, 01:51 PM

Cool!

After a full restart, everything works.

Thanks, here's a million dollars:

One Million Dollars.

If you print this out, you'll have a million dollars on paper.

propofol · 11-05-2007, 11:20 PM

Quote:

Originally Posted by HappyTux

Try creating/modifying the /etc/modprobe.d/sound with this for the contents.

Code:

## Added by me for proper sound card detection

alias snd-card-0 snd-cmipci
options snd-cmipci index=0
alias snd-card-1 snd-cx88-alsa
options snd-cx88-alsa index=1

At least I think I have the right module names in there if not change them to the correct ones then use /etc/init.d/alsa reload and hopefully you will have sound through the card, if it works then these settings will be used on every boot and you should have no more problems.

I had a similar problem with a conflict between the Conexant audio (HD-5500 HDTV card) & the Intel 82801EB/ER AC'97 audio. The only thing that worked was:

modprobe -r cx88_alsa
modprobe snd_intel8x0

BTW Should that code above read:

Code:

alias snd-card-1 snd-cx88-alsa
options snd-cx88-alsa index=1

Regards,
Stefan