Bug 229227

I know that I've been having this problem since quite a while... probably since
FC5 using my old ASUS A8V motherboard (s939 + AGP on a K8T800).  This bug came
back when I installed FC6 on my new mobo (DFI LanParty-UT nf4 Ultra-D s939 + PCI
Express nf4).

So this has probably nothing to do with the chipset...

While digging into the dmesg I find theses:
pwc: Unknown parameter `index'
pwc: Unknown parameter `index'
pwc: Unknown parameter `index'
cannot find the slot for index 0 (range 0-0)
Intel ICH: probe of 0000:00:04.0 failed with error -12

I think I used to have a way to fix the problem....  doing a bit of search...
http://www.lavrsen.dk/twiki/bin/view/PWC/FrequentlyAskedQuestionsPWC#modprobe_fails_with_FATAL_Error

Quoting:
If you see pwc: Unknown parameter `index' then the problem is that you have a
parameter in /etc/modprobe.conf saying something line options pwc index=1. 
Delete this line. It comes from an older version of the driver. Then try
modprobe pwc again. 


I had theses lines associated with sound in my modprobe.conf file:
alias snd-card-0 snd-intel8x0
options snd-card-0 index=0
options snd-intel8x0 index=0
remove snd-intel8x0 { /usr/sbin/alsactl store 0 >/dev/null 2>&1 || : ; };
/sbin/modprobe -r --ignore-remove snd-intel8x0
alias snd-card-1 pwc
options snd-card-1 index=1
options pwc index=1
remove pwc { /usr/sbin/alsactl store 1 >/dev/null 2>&1 || : ; }; /sbin/modprobe
-r --ignore-remove pwc

I just removed the line "options pwc index=1" and rebooted and got this instead:
Linux video capture interface: v2.00
pwc: Philips webcam module version 10.0.12 loaded.
pwc: Supports Philips PCA645/646, PCVC675/680/690, PCVC720[40]/730/740/750 &
PCVC830/840.
pwc: Also supports the Askey VC010, various Logitech Quickcams, Samsung MPC-C10
and MPC-C30,
pwc: the Creative WebCam 5 & Pro Ex, SOTEC Afina Eye and Visionite VCS-UC300 and
VCS-UM100.
pwc: Logitech QuickCam 4000 Pro USB webcam detected.
pwc: Registered as /dev/video0.
usbcore: registered new interface driver Philips webcam

Curiously enough, my sound does work...

Hope this helps.. and possibly solves the problem?

- vin

The problem is that trying to set the default sound card using the module option
index=0 is broken. having one or more usb sound devices and the motherboard
sound card, causes a race to get sound slot 0.
the fix is to configure the default alsa device in /etc/asound.conf using the
device name not the slot number. see http://alsa.opensrc.org/FAQ026

In my case I've created /etc/asound.conf with "card V8237" set for both pcm & ctl.
deleted the sound option index= line from modprobe.conf & changed the remove
line for the snd-via82xx to refer to the card by name : i.e 
"/usr/sbin/alsactl store V8237"

This works for me no matter which slot the motherboard sound card gets asigned
too. I've tried it with both a usb webcam and/or a usb headset connected.

Richard

You where right... it does not completely resolve my problem.  Thnx a lot for
the info.  After a bit of testing here is what I came with:

Find you sound device:
[root@gustav ~]# cat /proc/asound/cards
 0 [CK804          ]: NFORCE - NVidia CK804
                      NVidia CK804 with ALC850 at 0xfe02d000, irq 22

Create the asound.conf file by associating the [SndCrdName ] to the pcm and ctl
configuration:
[root@gustav ~]# vi /etc/asound.conf
pcm.!default {
    type hw
    card CK804
}
ctl.!default {
    type hw
    card CK804
}


Edit your modprobe.conf file like in this example:
/etc/modprobe.conf (BEFORE):
[root@gustav ~]# more /etc/modprobe.conf.20070221
alias eth0 skge
alias eth1 forcedeth
alias scsi_hostadapter sata_nv
alias snd-card-0 snd-intel8x0
options snd-card-0 index=0
options snd-intel8x0 index=0
remove snd-intel8x0 { /usr/sbin/alsactl store 0 >/dev/null 2>&1 || : ; };
/sbin/modprobe -r --ignore-remove snd-intel8x0
alias snd-card-1 pwc
options snd-card-1 index=1
options pwc index=1
remove pwc { /usr/sbin/alsactl store 1 >/dev/null 2>&1 || : ; }; /sbin/modprobe
-r --ignore-remove pwc
# I2C module options
alias char-major-89 i2c-dev
# nVidia
options nvidia NVreg_EnableAGPSBA=1 NVreg_EnableAGPFW=1


/etc/modprobe.conf (AFTER):
alias eth0 skge
alias eth1 forcedeth
alias scsi_hostadapter sata_nv
alias snd-card-0 snd-intel8x0
alias snd-card-1 pwc
# I2C module options
alias char-major-89 i2c-dev
# nVidia
options nvidia NVreg_EnableAGPSBA=1 NVreg_EnableAGPFW=1

Note that the line:
remove pwc { /usr/sbin/alsactl store 1 >/dev/null 2>&1 || : ; }; /sbin/modprobe
-r --ignore-remove pwc
prevented the automatic removal of the "alias snd-card-1 pwc" line in case your
usb device was disconnected... it might be worth keeping?

Now the big question:  Why is the fedora installer still using the index=X
deprecated option instead of a /etc/asound.conf file?  I've been running through
 this bug since at least FC4... wow! :(

At least this does work well now.  Would be nice to get this fixed by FC7.

Thnx a lot Richard!

*** Bug 219200 has been marked as a duplicate of this bug. ***

the only problem I have with this method is one old app that uses the oss sound
interface (quake). It expects the default sound card to be on /dev/dsp which is
slot 0. but now the default card doesn't always get loaded at slot 0 and quake
doesn't work.

Could you check the system-config-soundcard utility, if it sets your devices
properly? It should write /etc/* properly... You can cofigure a card order here,
too.