Dear All, I have seen the faq: http://www.ideasonboard.org/uvc/faq/ and the compatibility list of the cameras. I have the camera A4Tech PK-910H with the lsusb characteristics below. I wish to report that it does not work out of the box but quirk 0x80 solves the issues and perhaps it would be worthwhile to add my camera to the list. The issues that the camera has is that it works when connected on Debian 10, but after few seconds the camera shuts down and the following message is in dmesg: [2591407.297689] input: A4tech FHD 1080P PC Camera: A4t as /devices/pci0000:00/0000:00:14.0/usb1/1-13/1-13:1.0/input/input41 [2591407.336309] usb 1-13: 3:1: cannot get freq at ep 0x84 [2591407.703777] usb 1-13: 3:1: cannot get freq at ep 0x84 [2591407.767024] usb 1-13: 3:1: cannot get freq at ep 0x84 Should more info be necessary please let me know I will happily provide it. Best, Mateusz Łącki ******************************************** lsusb ****************************************** Bus 001 Device 037: ID 09da:2691 A4Tech Co., Ltd. Couldn't open device, some information will be missing Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.01 bDeviceClass 239 Miscellaneous Device bDeviceSubClass 2 bDeviceProtocol 1 Interface Association bMaxPacketSize0 64 idVendor 0x09da A4Tech Co., Ltd. idProduct 0x2691 bcdDevice 1.00 iManufacturer 2 iProduct 1 iSerial 3 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 0x02f7 bNumInterfaces 4 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 500mA Interface Association: bLength 8 bDescriptorType 11 bFirstInterface 0 bInterfaceCount 2 bFunctionClass 14 Video bFunctionSubClass 3 Video Interface Collection bFunctionProtocol 0 iFunction 5 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 14 Video bInterfaceSubClass 1 Video Control bInterfaceProtocol 0 iInterface 5 VideoControl Interface Descriptor: bLength 13 bDescriptorType 36 bDescriptorSubtype 1 (HEADER) bcdUVC 1.00 wTotalLength 0x006c dwClockFrequency 15.000000MHz bInCollection 1 baInterfaceNr( 0) 1 VideoControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 3 (OUTPUT_TERMINAL) bTerminalID 5 wTerminalType 0x0101 USB Streaming bAssocTerminal 0 bSourceID 4 iTerminal 0 VideoControl Interface Descriptor: bLength 28 bDescriptorType 36 bDescriptorSubtype 6 (EXTENSION_UNIT) bUnitID 3 guidExtensionCode {28f03370-6311-4a2e-ba2c-6890eb334016} bNumControl 24 bNrPins 1 baSourceID( 0) 2 bControlSize 3 bmControls( 0) 0xff bmControls( 1) 0xff bmControls( 2) 0xff iExtension 0 VideoControl Interface Descriptor: bLength 29 bDescriptorType 36 bDescriptorSubtype 6 (EXTENSION_UNIT) bUnitID 4 guidExtensionCode {bd5321b4-d635-ca45-b203-4e0149b301bc} bNumControl 32 bNrPins 1 baSourceID( 0) 3 bControlSize 4 bmControls( 0) 0x03 bmControls( 1) 0x80 bmControls( 2) 0x3f bmControls( 3) 0x9f iExtension 0 VideoControl Interface Descriptor: bLength 18 bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 1 wTerminalType 0x0201 Camera Sensor bAssocTerminal 0 iTerminal 0 wObjectiveFocalLengthMin 0 wObjectiveFocalLengthMax 0 wOcularFocalLength 0 bControlSize 3 bmControls 0x0002002e Auto-Exposure Mode Auto-Exposure Priority Exposure Time (Absolute) Focus (Absolute) Focus, Auto VideoControl Interface Descriptor: bLength 11 bDescriptorType 36 bDescriptorSubtype 5 (PROCESSING_UNIT) Warning: Descriptor too short bUnitID 2 bSourceID 1 wMaxMultiplier 0 bControlSize 2 bmControls 0x0000177f Brightness Contrast Hue Saturation Sharpness Gamma White Balance Temperature Backlight Compensation Gain Power Line Frequency White Balance Temperature, Auto iProcessing 0 bmVideoStandards 0x40 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 1 bInterfaceClass 14 Video bInterfaceSubClass 2 Video Streaming bInterfaceProtocol 0 iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 1 INTERFACE CLASS: 0f 24 01 02 df 01 82 00 05 00 00 00 01 00 00 INTERFACE CLASS: 0b 24 06 01 07 00 01 00 00 00 00 INTERFACE CLASS: 1e 24 07 01 00 80 07 38 04 00 80 53 3b 00 80 53 3b 4d 4a 3f 00 15 16 05 00 01 15 16 05 00 INTERFACE CLASS: 1e 24 07 02 00 00 05 d0 02 00 00 5e 1a 00 00 5e 1a 4d 22 1c 00 15 16 05 00 01 15 16 05 00 INTERFACE CLASS: 1e 24 07 03 00 00 04 00 03 00 00 80 16 00 00 80 16 4d 02 18 00 15 16 05 00 01 15 16 05 00 INTERFACE CLASS: 1e 24 07 04 00 20 03 58 02 00 a0 bb 0d 00 a0 bb 0d 4d a8 0e 00 15 16 05 00 01 15 16 05 00 INTERFACE CLASS: 1e 24 07 05 00 80 02 e0 01 00 00 ca 08 00 00 ca 08 4d 62 09 00 15 16 05 00 01 15 16 05 00 INTERFACE CLASS: 1e 24 07 06 00 60 01 20 01 00 80 e6 02 00 80 e6 02 4d 1a 03 00 15 16 05 00 01 15 16 05 00 INTERFACE CLASS: 1e 24 07 07 00 40 01 f0 00 00 80 32 02 00 80 32 02 4d 5a 02 00 15 16 05 00 01 15 16 05 00 INTERFACE CLASS: 1b 24 04 02 07 59 55 59 32 00 00 10 00 80 00 00 aa 00 38 9b 71 10 01 00 00 00 00 INTERFACE CLASS: 1e 24 05 01 00 80 02 e0 01 00 00 ca 08 00 00 ca 08 00 60 09 00 15 16 05 00 01 15 16 05 00 INTERFACE CLASS: 1e 24 05 02 00 80 07 38 04 00 40 e3 09 00 40 e3 09 00 48 3f 00 80 84 1e 00 01 80 84 1e 00 INTERFACE CLASS: 1e 24 05 03 00 00 05 d0 02 00 00 ca 08 00 00 ca 08 00 20 1c 00 40 42 0f 00 01 40 42 0f 00 INTERFACE CLASS: 1e 24 05 04 00 00 04 00 03 00 00 80 07 00 00 80 07 00 00 18 00 40 42 0f 00 01 40 42 0f 00 INTERFACE CLASS: 1e 24 05 05 00 20 03 58 02 00 a0 bb 0d 00 a0 bb 0d 00 a6 0e 00 15 16 05 00 01 15 16 05 00 INTERFACE CLASS: 1e 24 05 06 00 60 01 20 01 00 80 e6 02 00 80 e6 02 00 18 03 00 15 16 05 00 01 15 16 05 00 INTERFACE CLASS: 1e 24 05 07 00 40 01 f0 00 00 80 32 02 00 80 32 02 00 58 02 00 15 16 05 00 01 15 16 05 00 INTERFACE CLASS: 06 24 0d 01 01 04 Interface Association: bLength 8 bDescriptorType 11 bFirstInterface 2 bInterfaceCount 2 bFunctionClass 1 Audio bFunctionSubClass 0 bFunctionProtocol 0 iFunction 4 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 2 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 1 Control Device bInterfaceProtocol 0 iInterface 4 AudioControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 1 (HEADER) bcdADC 1.00 wTotalLength 0x002b 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) 0x0001 Mute Control bmaControls(1) 0x0002 Volume Control bmaControls(2) 0x0002 Volume Control 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 4 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 3 bAlternateSetting 1 bNumEndpoints 1 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 0 iInterface 4 AudioStreaming Interface Descriptor: bLength 7 bDescriptorType 36 bDescriptorSubtype 1 (AS_GENERAL) bTerminalLink 3 bDelay 1 frames wFormatTag 0x0001 PCM AudioStreaming Interface Descriptor: bLength 17 bDescriptorType 36 bDescriptorSubtype 2 (FORMAT_TYPE) bFormatType 1 (FORMAT_TYPE_I) bNrChannels 2 bSubframeSize 2 bBitResolution 16 bSamFreqType 3 Discrete tSamFreq[ 0] 16000 tSamFreq[ 1] 44100 tSamFreq[ 2] 48000 Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x84 EP 4 IN bmAttributes 5 Transfer Type Isochronous Synch Type Asynchronous Usage Type Data wMaxPacketSize 0x00c0 1x 192 bytes bInterval 4 bRefresh 0 bSynchAddress 0 AudioStreaming Endpoint Descriptor: bLength 7 bDescriptorType 37 bDescriptorSubtype 1 (EP_GENERAL) bmAttributes 0x01 Sampling Frequency bLockDelayUnits 0 Undefined wLockDelay 0x0000
