[GnomeMeeting-list] Logitech Quickcam pro 4000 microphone does not work with gnomeeting-1.2.1

[Leonid Petrov <user1 lpetrov net>]

Dear all,

  I cannot enable microphone Logitech Quickcam pro 4000 to work with 
gnomemeeting-1.2.1. I have a built-in audio support in my mobo, ABIT IS7, 
so I configure my built-in chip as the first sound card and webcam audio as 
the second. xawtv shows that video of my webcam works. Command
rec -d /dev/dsp1 -f a -r 44110 -o /tmp/a1.wav
shows that microphone from the web cam works correctly. However, when
I attempt to configure gnomemeeting, druid tells me
"Impossible to open the selected audio device (/dev/dsp1) for recording"
when I try to test settings. Druid, step 6, shows me only OSS and Quicknet.
I selected OSS.

  I combed through gnomemeeting mailing list and found that similar problems
were reported in the past, but I could not find solution. As far as 
I understand (maybe incorrectly), the problem is that pwlib tries to 
open /dev/dsp1 for writing. Yes, I can open /dev/dsp1 for reading 
( cat /dev/dsp1 > /tmp/test.raw ) and then listen what is written 
(cat /tmp/test.raw > /dev/dsp ), but I cannot open /dev/dsp1 for writing:

/tmp> cat /tmp/test.raw > /dev/dsp1
/dev/dsp1: No such device.
/tmp> 

 I found 

>     * From: Damien Sandras <dsandras seconix com>
>     * To: gnomemeeting-list gnome org
>     * Subject: Re: [GnomeMeeting-list] Sound problems
>     * Date: 23 Feb 2003 15:18:27 +0100
> 
> Don't use the snd-audio-usb module for the webcam microphone but the
> "audio" module from the standard kernel : modprobe audio.

  However, I did not find the way how to use audio instead of snd_usb_audio:
if I remove snd_usb_audio and load audio, /dev/dsp1 is not working: read
returns nothing. Attempts to play with /etc/modules.conf did not solve the
problem.

  So, the question is how to enable built-in microphone to work with 
gnomemeeting-1.2.1, kernel 2.6.11?

Leonid
---------------------------------- Attachment: --------------------------------
Linux pethome 2.6.11 #1 SMP Sun Mar 20 09:10:40 EST 2005 i686 i686 i386 GNU/Linux
tmp> lsmod
Module                  Size  Used by
ide_cd                 42628  0 
cdrom                  41888  1 ide_cd
sg                     35744  0 
snd_pcm_oss            54944  0 
snd_mixer_oss          20736  1 snd_pcm_oss
snd_usb_audio          68288  0 
snd_usb_lib            13696  1 snd_usb_audio
snd_rawmidi            25888  1 snd_usb_lib
snd_seq_device          8972  1 snd_rawmidi
snd_intel8x0           34368  0 
snd_ac97_codec         79096  1 snd_intel8x0
snd_pcm                97284  4 snd_pcm_oss,snd_usb_audio,snd_intel8x0,snd_ac97_codec
snd_timer              26756  1 snd_pcm
snd                    56676  9 snd_pcm_oss,snd_mixer_oss,snd_usb_audio,snd_rawmidi,snd_seq_device,snd_intel8x0,snd_ac97_codec,snd_pcm,snd_timer
snd_page_alloc         10372  2 snd_intel8x0,snd_pcm
soundcore              10464  1 snd
nvidia               3924380  12 
ppp_synctty            11776  0 
parport_pc             26564  1 
lp                     11140  0 
parport                26304  2 parport_pc,lp
autofs4                20228  0 
w83627hf               30760  0 
eeprom                  7696  0 
i2c_sensor              3840  2 w83627hf,eeprom
i2c_isa                 2304  0 
i2c_i801                9100  0 
i2c_core               23296  5 w83627hf,eeprom,i2c_sensor,i2c_isa,i2c_i801
sunrpc                148932  1 
sk98lin               179936  0 
microcode               7760  0 
dm_mod                 63364  0 
evdev                   9728  0 
usbhid                 35264  0 
uhci_hcd               34064  0 
pwc                    92020  0 
videodev               10240  1 pwc
v4l2_common             6144  1 pwc
ohci_hcd               22664  0 
ehci_hcd               33544  0 
usbcore               126072  8 snd_usb_audio,snd_usb_lib,usbhid,uhci_hcd,pwc,ohci_hcd,ehci_hcd
thermal                13832  0 
processor              23740  1 thermal
fan                     4740  0 
ipv6                  268832  23 
ata_piix                9732  2 
libata                 49028  1 ata_piix
sd_mod                 18176  3 
scsi_mod               95304  3 sg,libata,sd_mod

cat /etc/modprobe.conf
alias eth0 sk98lin
options sk98lin Speed_A=10 DupCap_A=Half AutoNeg_A=Off
#
alias scsi_hostadapter ata_piix
#
alias usb-controller ehci-hcd
alias usb-controller1 ohci-hcd
alias usb-controller2 uhci-hcd
#
alias char-major-195* nvidia
#
# Settings for built-in ABIT IS7 mobo audio support
#
alias snd-card-0         snd-intel8x0
options snd-intel8x0     index=0 enable=1
alias char-major-116     snd
alias char-major-14      soundcore
alias sound-slot-0       snd-card-0
alias sound-service-0-0  snd-mixer-oss
install snd-intel8x0 /sbin/modprobe --ignore-install snd-intel8x0 && /usr/sbin/alsactl restore >/dev/null 2>&1 || :
remove snd-intel8x0 { /usr/sbin/alsactl store >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-intel8x0
#
#  Settings for Logitech QuickCam pro 4000
#
alias snd-card-1         snd_usb_audio
alias sound-service-1-0  snd_usb_audio
alias sound-slot-1       snd-card-1
options snd-usb-audio    index=1 enable=1 
alias char-major-81      videodev
alias char-major-81-0    pwc

/etc/init.d/local:
...
                rmmod snd_usb_audio
                rmmod snd_usb_lib
                rmmod snd_pcm_oss
                rmmod snd_intel8x0
                rmmod snd_ac97_codec
                rmmod snd_pcm
                rmmod snd_timer
                rmmod snd_rawmidi
                rmmod snd_seq_device
                rmmod snd_mixer_oss
                rmmod snd
                rmmod snd_page_alloc
                rmmod audio
                rmmod soundcore
#
                modprobe soundcore
                modprobe snd-intel8x0
                modprobe snd_usb_audio
...

pwlib-1.8.4 was conmplied from sources:
./configure --prefix=/usr --enable-plugins

gnomemeeting-1.2.1 was installed from soruces following BLFS recipies:
./configure --prefix=`pkg-config --variable=prefix ORBit-2.0` -sysconfdir=/etc/gnome --localstatedir=/var/lib

/etc/hotplug/blacklist
...
snd-usb-audio