New question #77483 on Ubuntu:
https://answers.launchpad.net/ubuntu/+question/77483
I have a Dell SP2208WFP monitor with built-in webcam and microphone that both
work fine under Windows XP. Under Ubuntu 9.04, the webcam works (I can see my
video in Ekiga softphone), but the webcam microphone does not.
The webcam microphone is always switched off in the Volume Control. When I turn
it on, nothing happens and as soon as I reopen the Volume Control window, the
webcam mic shows as switched off again.
alsamixer shows the Capture level for the webcam mic at 75 level, which is
normal. I can increase or decrease the capture level, but it does not seem to
have any effect on the mic.
When I try recording something using the webcam mic, I get errors:
v...@ubuntu:~$ arecord -f cd -D hw:1,0 -d 20 test.wav
Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
arecord: set_params:939: Broken configuration for this PCM: no configurations
available
When I try using this microphone is my input device in Skype 2.0.0.72, I get
"Problem with Audio Capture".
Here is some additional information about my system configuration:
v...@ubuntu:~$ cat /proc/asound/cards
0 [Audigy2 ]: Audigy2 - Audigy 2 [SB0350b]
Audigy 2 [SB0350b] (rev.4, serial:0x20061102) at 0xdcc0,
irq 19
1 [SP2208WFP ]: USB-Audio - Monitor Webcam (SP2208WFP)
Mic-OmniVision Technologies, Inc.538-2640-07.08.09.6
Monitor Webcam (SP2208WFP)
v...@ubuntu:~$ cat /proc/asound/card1/stream0
Mic-OmniVision Technologies, Inc.538-2640-07.08.09.6 Monitor Webcam (SP2208WFP)
: USB Audio
Capture:
Status: Stop
Interface 3
Altset 1
Format: 0x2
Channels: 2
Endpoint: 4 IN (SYNC)
Rates: 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000
v...@ubuntu:~$ arecord --list-devices
**** List of CAPTURE Hardware Devices ****
card 0: Audigy2 [Audigy 2 [SB0350b]], device 0: emu10k1 [ADC Capture/Standard
PCM Playback]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Audigy2 [Audigy 2 [SB0350b]], device 1: emu10k1 mic [Mic Capture]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Audigy2 [Audigy 2 [SB0350b]], device 2: emu10k1 efx [Multichannel
Capture/PT Playback]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Audigy2 [Audigy 2 [SB0350b]], device 4: p16v [p16v]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: SP2208WFP [Monitor Webcam (SP2208WFP)], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
v...@ubuntu:~$ lsusb --verbose (I have included only the relevant parts of
output!)
...
Bus 001 Device 007: ID 05a9:2643 OmniVision Technologies, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x05a9 OmniVision Technologies, Inc.
idProduct 0x2643
bcdDevice 1.00
iManufacturer 1 Mic-OmniVision Technologies, Inc.538-2640-07.08.09.6
iProduct 2 Monitor Webcam (SP2208WFP)
iSerial 0
bNumConfigurations 1
...
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 1051
bNumInterfaces 4
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 2
bInterfaceCount 2
bFunctionClass 1 Audio
bFunctionSubClass 1 Control Device
bFunctionProtocol 0
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 1 Control Device
bInterfaceProtocol 0
iInterface 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 1.00
wTotalLength 43
bInCollection 1
baInterfaceNr( 0) 3
AudioControl Interface Descriptor:
bLength 12
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0205 Microphone Array
bAssocTerminal 0
bNrChannels 2
wChannelConfig 0x0000
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 2
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 3
iTerminal 0
AudioControl Interface Descriptor:
bLength 13
bDescriptorType 36
bDescriptorSubtype 6 (FEATURE_UNIT)
bUnitID 3
bSourceID 1
bControlSize 2
bmaControls( 0) 0x43
bmaControls( 0) 0x02
Mute
Volume
Automatic Gain
Loudness
bmaControls( 1) 0x00
bmaControls( 1) 0x00
bmaControls( 2) 0x00
bmaControls( 2) 0x00
iFeature 0
I have googled extensively in search of a solution to this problem and found
quite a few conversations on this subject, however none of the proposed
solutions helped me. Here is a partial list of resources and suggestions I
tried without success so far:
ALSA module configuration:
http://alsa-project.org/main/index.php/Matrix:Module-usb-audio
Setting up uvcvideo drivers:
http://ubuntuforums.org/showthread.php?t=684153&page=3
Tweaking up alsa-base.conf settings:
http://ubuntuforums.org/showthread.php?t=1126713
[Alsa-user] microphone setup on Dell Monitor Webcam (SP2208WFP) (same problem,
no solution):
http://www.mail-archive.com/[email protected]/msg24338.html
Configuring USB microphones on Linux:
http://www.audacityteam.org/wiki/index.php?title=USB_mic_on_Linux
Now, here is a part from /var/log/syslog that looks highly suspicious since
line three below directly refers to card1, which is my webcam usb microphone
capture card:
Jul 19 11:46:03 ubuntu pulseaudio[5003]: alsa-util.c: Cannot find fallback
mixer control "PCM" or mixer control is no combination of switch/volume.
Jul 19 11:46:03 ubuntu pulseaudio[5003]: alsa-util.c: Cannot find fallback
mixer control "Mic" or mixer control is no combination of switch/volume.
Jul 19 11:46:04 ubuntu pulseaudio[5003]: alsa-util.c: Failed to set hardware
parameters on plug:hw:1: Invalid argument
Any ideas what hardware parameters might be causing the problem? It does very
much look like something is either missing or incorrect in my system
configuration!
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