VF0560 Live! Cam Optia AF no audio on some machines

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All:

I have two VF0560 Live! Cam Optia AF webcams and vlc with latest v4l2 yield both video and audio on three out of five machines running CentOS 5.2 with the 2.6.27.8 kernel. However, two of the machines do not yield any audio, only video. When I do an arecord all that is captured is 0x00 over and over to the wav file. The alsa USB audio driver is up and loaded and receiving data from the webcam. However, this data seems to be 0x00. What could be the problem? Am I getting lucky on the other three machines? Is there some GPIO that is floating or something?

[root@vizioroom105 ~]# lsusb -d 041e:406d -v

Bus 002 Device 004: ID 041e:406d Creative Technology, Ltd
Device Descriptor:
 bLength                18
 bDescriptorType         1
 bcdUSB               2.00
 bDeviceClass          239 Miscellaneous Device
 bDeviceSubClass         2 ?
 bDeviceProtocol         1 Interface Association
 bMaxPacketSize0        64
 idVendor           0x041e Creative Technology, Ltd
 idProduct          0x406d
 bcdDevice            1.00
 iManufacturer           2 Creative Labs
 iProduct                1 VF0560 Live! Cam Optia AF
 iSerial                 3 080909_A_08071
 bNumConfigurations      1
 Configuration Descriptor:
   bLength                 9
   bDescriptorType         2
   wTotalLength         1107
   bNumInterfaces          4
   bConfigurationValue     1
   iConfiguration          0
   bmAttributes         0x80
   MaxPower              500mA
   UNRECOGNIZED:  08 0b 00 02 0e 03 00 00
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        0
     bAlternateSetting       0
     bNumEndpoints           1
     bInterfaceClass        14 Video
     bInterfaceSubClass      1 Video Control
     bInterfaceProtocol      0
     iInterface              0
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x83  EP 3 IN
       bmAttributes            3
         Transfer Type            Interrupt
         Synch Type               None
         Usage Type               Data
       wMaxPacketSize     0x0010  1x 16 bytes
       bInterval               6
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting       0
     bNumEndpoints           0
     bInterfaceClass        14 Video
     bInterfaceSubClass      2 Video Streaming
     bInterfaceProtocol      0
     iInterface              0
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting       1
     bNumEndpoints           1
     bInterfaceClass        14 Video
     bInterfaceSubClass      2 Video Streaming
     bInterfaceProtocol      0
     iInterface              0
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x81  EP 1 IN
       bmAttributes            5
         Transfer Type            Isochronous
         Synch Type               Asynchronous
         Usage Type               Data
       wMaxPacketSize     0x0080  1x 128 bytes
       bInterval               1
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting       2
     bNumEndpoints           1
     bInterfaceClass        14 Video
     bInterfaceSubClass      2 Video Streaming
     bInterfaceProtocol      0
     iInterface              0
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x81  EP 1 IN
       bmAttributes            5
         Transfer Type            Isochronous
         Synch Type               Asynchronous
         Usage Type               Data
       wMaxPacketSize     0x0100  1x 256 bytes
       bInterval               1
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting       3
     bNumEndpoints           1
     bInterfaceClass        14 Video
     bInterfaceSubClass      2 Video Streaming
     bInterfaceProtocol      0
     iInterface              0
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x81  EP 1 IN
       bmAttributes            5
         Transfer Type            Isochronous
         Synch Type               Asynchronous
         Usage Type               Data
       wMaxPacketSize     0x0320  1x 800 bytes
       bInterval               1
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting       4
     bNumEndpoints           1
     bInterfaceClass        14 Video
     bInterfaceSubClass      2 Video Streaming
     bInterfaceProtocol      0
     iInterface              0
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x81  EP 1 IN
       bmAttributes            5
         Transfer Type            Isochronous
         Synch Type               Asynchronous
         Usage Type               Data
       wMaxPacketSize     0x0b20  2x 800 bytes
       bInterval               1
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting       5
     bNumEndpoints           1
     bInterfaceClass        14 Video
     bInterfaceSubClass      2 Video Streaming
     bInterfaceProtocol      0
     iInterface              0
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x81  EP 1 IN
       bmAttributes            5
         Transfer Type            Isochronous
         Synch Type               Asynchronous
         Usage Type               Data
       wMaxPacketSize     0x1320  3x 800 bytes
       bInterval               1
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting       6
     bNumEndpoints           1
     bInterfaceClass        14 Video
     bInterfaceSubClass      2 Video Streaming
     bInterfaceProtocol      0
     iInterface              0
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x81  EP 1 IN
       bmAttributes            5
         Transfer Type            Isochronous
         Synch Type               Asynchronous
         Usage Type               Data
       wMaxPacketSize     0x1400  3x 0 bytes
       bInterval               1
       UNRECOGNIZED:  08 0b 02 02 01 00 00 00
   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      0x0201 Microphone
       bAssocTerminal          0
       bNrChannels             2
       wChannelConfig     0x0000
       iChannelNames           0
       iTerminal               0
     AudioControl Interface Descriptor:
       bLength                13
       bDescriptorType        36
       bDescriptorSubtype      6 (FEATURE_UNIT)
       bUnitID                 2
       bSourceID               1
       bControlSize            2
       bmaControls( 0)      0x01
       bmaControls( 0)      0x00
         Mute
       bmaControls( 1)      0x02
       bmaControls( 1)      0x00
         Volume
       bmaControls( 2)      0x02
       bmaControls( 2)      0x00
         Volume
       iFeature                0
     AudioControl Interface Descriptor:
       bLength                 9
       bDescriptorType        36
       bDescriptorSubtype      3 (OUTPUT_TERMINAL)
       bTerminalID             3
       wTerminalType      0x0101 USB Streaming
       bAssocTerminal          0
       bSourceID               2
       iTerminal               0
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        3
     bAlternateSetting       0
     bNumEndpoints           0
     bInterfaceClass         1 Audio
     bInterfaceSubClass      2 Streaming
     bInterfaceProtocol      0
     iInterface              0
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        3
     bAlternateSetting       1
     bNumEndpoints           1
     bInterfaceClass         1 Audio
     bInterfaceSubClass      2 Streaming
     bInterfaceProtocol      0
     iInterface              0
     AudioStreaming Interface Descriptor:
       bLength                 7
       bDescriptorType        36
       bDescriptorSubtype      1 (AS_GENERAL)
       bTerminalLink           3
       bDelay                  1 frames
       wFormatTag              1 PCM
     AudioStreaming Interface Descriptor:
       bLength                20
       bDescriptorType        36
       bDescriptorSubtype      2 (FORMAT_TYPE)
       bFormatType             1 (FORMAT_TYPE_I)
       bNrChannels             2
       bSubframeSize           2
       bBitResolution         16
       bSamFreqType            4 Discrete
       tSamFreq[ 0]         8000
       tSamFreq[ 1]        16000
       tSamFreq[ 2]        24000
       tSamFreq[ 3]        48000
     Endpoint Descriptor:
       bLength                 9
       bDescriptorType         5
       bEndpointAddress     0x84  EP 4 IN
       bmAttributes            5
         Transfer Type            Isochronous
         Synch Type               Asynchronous
         Usage Type               Data
       wMaxPacketSize     0x0190  1x 400 bytes
       bInterval               4
       bRefresh                0
       bSynchAddress           0
       AudioControl Endpoint Descriptor:
         bLength                 7
         bDescriptorType        37
         bDescriptorSubtype      1 (EP_GENERAL)
         bmAttributes         0x01
           Sampling Frequency
         bLockDelayUnits         0 Undefined
         wLockDelay              0 Undefined
Device Qualifier (for other device speed):
 bLength                10
 bDescriptorType         6
 bcdUSB               2.00
 bDeviceClass          239 Miscellaneous Device
 bDeviceSubClass         2 ?
 bDeviceProtocol         1 Interface Association
 bMaxPacketSize0        64
 bNumConfigurations      1

Best Regards,
--
Rob Krakora
Senior Software Engineer
MessageNet Systems
101 East Carmel Dr. Suite 105
Carmel, IN 46032
(317)566-1677 Ext. 206
(317)663-0808 Fax

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