Hi,
I just got some older Bamster soundbar model (probably not a keeper)
that takes USB either for power (in which case it uses AUX in analog) or
also as USB soundcard. In the latter case, however, it just switches
itself off after a few seconds.
dmesg is
[ 1201.960192] usb 5-2: new full-speed USB device number 5 using uhci_hcd
[ 1202.098273] usb 5-2: config 1 has an invalid interface number: 3 but max is 2
[ 1202.098278] usb 5-2: config 1 has no interface number 2
[ 1202.107265] usb 5-2: New USB device found, idVendor=10d6, idProduct=1100
[ 1202.107271] usb 5-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1202.107276] usb 5-2: Product: USB Audio
[ 1202.107280] usb 5-2: Manufacturer: ACTIONS
[ 1203.326284] usb 5-2: 1:1: cannot get freq at ep 0x2
[ 1203.338528] usb 5-2: 3:0: cannot get min/max values for control 2 (id 3)
[ 1203.344305] usbhid 5-2:1.3: can't add hid device: -71
[ 1203.344328] usbhid: probe of 5-2:1.3 failed with error -71
[ 1203.456336] usb 5-2: USB disconnect, device number 5
and if I am fast enough (before it switches itself off again),
lsusb -v
delivers
Bus 005 Device 007: ID 10d6:1100 Actions Semiconductor Co., Ltd MPMan MP-Ki 128 MP3 Player/Recorder
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x10d6 Actions Semiconductor Co., Ltd
idProduct 0x1100 MPMan MP-Ki 128 MP3 Player/Recorder
bcdDevice 1.00
iManufacturer 1 (error)
iProduct 2 (error)
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 135
bNumInterfaces 3
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
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 40
bInCollection 1
baInterfaceNr( 0) 1
AudioControl Interface Descriptor:
bLength 12
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bNrChannels 2
wChannelConfig 0x0003
Left Front (L)
Right Front (R)
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 2
wTerminalType 0x0301 Speaker
bAssocTerminal 0
bSourceID 3
iTerminal 0
AudioControl Interface Descriptor:
bLength 10
bDescriptorType 36
bDescriptorSubtype 6 (FEATURE_UNIT)
bUnitID 3
bSourceID 1
bControlSize 1
bmaControls( 0) 0x03
Mute Control
Volume Control
bmaControls( 1) 0x00
bmaControls( 2) 0x00
iFeature 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
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 1
bDelay 0 frames
wFormatTag 1 PCM
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 2
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 44100
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 9
Transfer Type Isochronous
Synch Type Adaptive
Usage Type Data
wMaxPacketSize 0x00c0 1x 192 bytes
bInterval 1
bRefresh 0
bSynchAddress 0
AudioControl Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x01
Sampling Frequency
bLockDelayUnits 2 Decoded PCM samples
wLockDelay 512 Decoded PCM samples
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 2.01
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 33
Warning: incomplete report descriptor
Report Descriptor: (length is 1)
Item(Main ): (null), data=none
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 1
Device Status: 0x78a0
(Bus Powered)
Any idea where I can go from here? It's annoying that it just powers
itself off again, and the sound quality is supposed to be better when
using sound via USB rather than AUX in.
--
David Kastrup
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