USB 攝像頭不工作，辨識為鍵盤

在執行 Fedora 34 的筆記型電腦上檢測到插入 USB UVC 攝像頭，但將其辨識為鍵盤。

cheese不將此相機視為輸入設備，僅將內置網路攝像頭視為輸入設備。

如何正確檢測相機？

journalctl輸出：

kernel: usb 2-2: new high-speed USB device number 5 using xhci_hcd
kernel: usb 2-2: New USB device found, idVendor=1a40, idProduct=0801, bcdDevice= 1.00
kernel: usb 2-2: New USB device strings: Mfr=0, Product=1, SerialNumber=0
kernel: usb 2-2: Product: USB 2.0 Hub
kernel: hub 2-2:1.0: USB hub found
kernel: hub 2-2:1.0: 4 ports detected
upowerd[1618]: treating change event as add on /sys/devices/pci0000:00/0000:00:14.0/usb2/2-2
kernel: usb 2-2.4: new high-speed USB device number 6 using xhci_hcd
kernel: usb 2-2.4: New USB device found, idVendor=2b16, idProduct=6689, bcdDevice= 6.19
kernel: usb 2-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
kernel: usb 2-2.4: Product: DP 5M CAM
kernel: usb 2-2.4: Manufacturer: SunplusIT Inc
kernel: usb 2-2.4: SerialNumber: 01.00.00
kernel: uvcvideo: Found UVC 1.00 device DP 5M CAM (2b16:6689)
kernel: input: DP 5M CAM: DP 5M CAM as /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2.4/2-2.4:1.0/input/input22
mtp-probe[6920]: checking bus 2, device 6: "/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2.4"
mtp-probe[6920]: bus: 2, device: 6 was not an MTP device
/usr/libexec/gdm-x-session[2187]: (II) config/udev: Adding input device DP 5M CAM: DP 5M CAM (/dev/input/event19)
/usr/libexec/gdm-x-session[2187]: (**) DP 5M CAM: DP 5M CAM: Applying InputClass "evdev keyboard catchall"
/usr/libexec/gdm-x-session[2187]: (**) DP 5M CAM: DP 5M CAM: Applying InputClass "libinput keyboard catchall"
/usr/libexec/gdm-x-session[2187]: (**) DP 5M CAM: DP 5M CAM: Applying InputClass "system-keyboard"
/usr/libexec/gdm-x-session[2187]: (II) Using input driver 'libinput' for 'DP 5M CAM: DP 5M CAM'
/usr/libexec/gdm-x-session[2187]: (II) systemd-logind: got fd for /dev/input/event19 13:83 fd 76 paused 0
/usr/libexec/gdm-x-session[2187]: (**) DP 5M CAM: DP 5M CAM: always reports core events
/usr/libexec/gdm-x-session[2187]: (**) Option "Device" "/dev/input/event19"
/usr/libexec/gdm-x-session[2187]: (**) Option "_source" "server/udev"
/usr/libexec/gdm-x-session[2187]: (II) event19 - DP 5M CAM: DP 5M CAM: is tagged by udev as: Keyboard
/usr/libexec/gdm-x-session[2187]: (II) event19 - DP 5M CAM: DP 5M CAM: device is a keyboard
/usr/libexec/gdm-x-session[2187]: (II) event19 - DP 5M CAM: DP 5M CAM: device removed
/usr/libexec/gdm-x-session[2187]: (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2.4/2-2.4:1.0/input/input22/event19"
/usr/libexec/gdm-x-session[2187]: (II) XINPUT: Adding extended input device "DP 5M CAM: DP 5M CAM" (type: KEYBOARD, id 16)
/usr/libexec/gdm-x-session[2187]: (**) Option "xkb_layout" "us,ca"
/usr/libexec/gdm-x-session[2187]: (**) Option "xkb_variant" ",multix"
/usr/libexec/gdm-x-session[2187]: (II) event19 - DP 5M CAM: DP 5M CAM: is tagged by udev as: Keyboard
/usr/libexec/gdm-x-session[2187]: (II) event19 - DP 5M CAM: DP 5M CAM: device is a keyboard
mtp-probe[6952]: checking bus 2, device 6: "/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2.4"
mtp-probe[6952]: bus: 2, device: 6 was not an MTP device
/usr/libexec/gdm-x-session[6954]: The XKEYBOARD keymap compiler (xkbcomp) reports:
/usr/libexec/gdm-x-session[6954]: > Error:            Key <MDSW> added to map for multiple modifiers
/usr/libexec/gdm-x-session[6954]: >                   Using Mod3, ignoring Mod5.
/usr/libexec/gdm-x-session[6954]: > Warning:          Could not resolve keysym XF86FullScreen
/usr/libexec/gdm-x-session[6954]: Errors from xkbcomp are not fatal to the X server

lsusb -vv輸出：

Bus 002 Device 010: ID 2b16:6689 SunplusIT Inc DP 5M CAM
Device Descriptor:
 bLength                18
 bDescriptorType         1
 bcdUSB               2.00
 bDeviceClass          239 Miscellaneous Device
 bDeviceSubClass         2 
 bDeviceProtocol         1 Interface Association
 bMaxPacketSize0        64
 idVendor           0x2b16 
 idProduct          0x6689 
 bcdDevice            6.19
 iManufacturer           1 SunplusIT Inc
 iProduct                2 DP 5M CAM
 iSerial                 3 01.00.00
 bNumConfigurations      1
 Configuration Descriptor:
   bLength                 9
   bDescriptorType         2
   wTotalLength       0x021f
   bNumInterfaces          2
   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               4 DP 5M CAM
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        0
     bAlternateSetting       0
     bNumEndpoints           1
     bInterfaceClass        14 Video
     bInterfaceSubClass      1 Video Control
     bInterfaceProtocol      0 
     iInterface              4 DP 5M CAM
     VideoControl Interface Descriptor:
       bLength                13
       bDescriptorType        36
       bDescriptorSubtype      1 (HEADER)
       bcdUVC               1.00
       wTotalLength       0x006d
       dwClockFrequency       48.000000MHz
       bInCollection           1
       baInterfaceNr( 0)       1
     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           0x0000000a
         Auto-Exposure Mode
         Exposure Time (Absolute)
     VideoControl Interface Descriptor:
       bLength                11
       bDescriptorType        36
       bDescriptorSubtype      5 (PROCESSING_UNIT)
     Warning: Descriptor too short
       bUnitID                 2
       bSourceID               1
       wMaxMultiplier      16384
       bControlSize            2
       bmControls     0x0000157f
         Brightness
         Contrast
         Hue
         Saturation
         Sharpness
         Gamma
         White Balance Temperature
         Backlight Compensation
         Power Line Frequency
         White Balance Temperature, Auto
       iProcessing             0 
       bmVideoStandards     0x1d
         None
         PAL - 625/50
         SECAM - 625/50
         NTSC - 625/50
     VideoControl Interface Descriptor:
       bLength                29
       bDescriptorType        36
       bDescriptorSubtype      6 (EXTENSION_UNIT)
       bUnitID                 3
       guidExtensionCode         {0fb885c3-68c2-4547-90f7-8f47579d95fc}
       bNumControls            5
       bNrInPins               1
       baSourceID( 0)          2
       bControlSize            4
       bmControls( 0)       0x1f
       bmControls( 1)       0x00
       bmControls( 2)       0x00
       bmControls( 3)       0x00
       iExtension              0 
     VideoControl Interface Descriptor:
       bLength                29
       bDescriptorType        36
       bDescriptorSubtype      6 (EXTENSION_UNIT)
       bUnitID                 4
       guidExtensionCode         {63610682-5070-49ab-b8cc-b3855e8d221d}
       bNumControls           25
       bNrInPins               1
       baSourceID( 0)          3
       bControlSize            4
       bmControls( 0)       0xff
       bmControls( 1)       0xff
       bmControls( 2)       0x77
       bmControls( 3)       0x07
       iExtension              0 
     VideoControl Interface Descriptor:
       bLength                 9
       bDescriptorType        36
       bDescriptorSubtype      3 (OUTPUT_TERMINAL)
       bTerminalID             5
       wTerminalType      0x0101 USB Streaming
       bAssocTerminal          0
       bSourceID               4
       iTerminal               0 
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x87  EP 7 IN
       bmAttributes            3
         Transfer Type            Interrupt
         Synch Type               None
         Usage Type               Data
       wMaxPacketSize     0x0010  1x 16 bytes
       bInterval               8
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting       0
     bNumEndpoints           0
     bInterfaceClass        14 Video
     bInterfaceSubClass      2 Video Streaming
     bInterfaceProtocol      0 
     iInterface              0 
     VideoStreaming Interface Descriptor:
       bLength                            14
       bDescriptorType                    36
       bDescriptorSubtype                  1 (INPUT_HEADER)
       bNumFormats                         1
       wTotalLength                   0x00d3
       bEndPointAddress                  129
       bmInfo                              0
       bTerminalLink                       5
       bStillCaptureMethod                 1
       bTriggerSupport                     0
       bTriggerUsage                       0
       bControlSize                        1
       bmaControls( 0)                     4
     VideoStreaming Interface Descriptor:
       bLength                            11
       bDescriptorType                    36
       bDescriptorSubtype                  6 (FORMAT_MJPEG)
       bFormatIndex                        1
       bNumFrameDescriptors                6
       bFlags                              1
         Fixed-size samples: Yes
       bDefaultFrameIndex                  1
       bAspectRatioX                       0
       bAspectRatioY                       0
       bmInterlaceFlags                 0x00
         Interlaced stream or variable: No
         Fields per frame: 1 fields
         Field 1 first: No
         Field pattern: Field 1 only
       bCopyProtect                        0
     VideoStreaming Interface Descriptor:
       bLength                            30
       bDescriptorType                    36
       bDescriptorSubtype                  7 (FRAME_MJPEG)
       bFrameIndex                         1
       bmCapabilities                   0x01
         Still image supported
       wWidth                           1920
       wHeight                          1080
       dwMinBitRate                829440000
       dwMaxBitRate                829440000
       dwMaxVideoFrameBufferSize     4147200
       dwDefaultFrameInterval         400000
       bFrameIntervalType                  1
       dwFrameInterval( 0)            400000
     VideoStreaming Interface Descriptor:
       bLength                            30
       bDescriptorType                    36
       bDescriptorSubtype                  7 (FRAME_MJPEG)
       bFrameIndex                         2
       bmCapabilities                   0x01
         Still image supported
       wWidth                           2592
       wHeight                          1944
       dwMinBitRate                1612431360
       dwMaxBitRate                1612431360
       dwMaxVideoFrameBufferSize    10077696
       dwDefaultFrameInterval         500000
       bFrameIntervalType                  1
       dwFrameInterval( 0)            500000
     VideoStreaming Interface Descriptor:
       bLength                            30
       bDescriptorType                    36
       bDescriptorSubtype                  7 (FRAME_MJPEG)
       bFrameIndex                         3
       bmCapabilities                   0x01
         Still image supported
       wWidth                           1280
       wHeight                           720
       dwMinBitRate                368640000
       dwMaxBitRate                368640000
       dwMaxVideoFrameBufferSize     1843200
       dwDefaultFrameInterval         400000
       bFrameIntervalType                  1
       dwFrameInterval( 0)            400000
     VideoStreaming Interface Descriptor:
       bLength                            30
       bDescriptorType                    36
       bDescriptorSubtype                  7 (FRAME_MJPEG)
       bFrameIndex                         4
       bmCapabilities                   0x01
         Still image supported
       wWidth                            640
       wHeight                           480
       dwMinBitRate                122880000
       dwMaxBitRate                122880000
       dwMaxVideoFrameBufferSize      614400
       dwDefaultFrameInterval         400000
       bFrameIntervalType                  1
       dwFrameInterval( 0)            400000
     VideoStreaming Interface Descriptor:
       bLength                            30
       bDescriptorType                    36
       bDescriptorSubtype                  7 (FRAME_MJPEG)
       bFrameIndex                         5
       bmCapabilities                   0x01
         Still image supported
       wWidth                           1600
       wHeight                          1200
       dwMinBitRate                768000000
       dwMaxBitRate                768000000
       dwMaxVideoFrameBufferSize     3840000
       dwDefaultFrameInterval         400000
       bFrameIntervalType                  1
       dwFrameInterval( 0)            400000
     VideoStreaming Interface Descriptor:
       bLength                            30
       bDescriptorType                    36
       bDescriptorSubtype                  7 (FRAME_MJPEG)
       bFrameIndex                         6
       bmCapabilities                   0x01
         Still image supported
       wWidth                           2048
       wHeight                          1936
       dwMinBitRate                1268776960
       dwMaxBitRate                1268776960
       dwMaxVideoFrameBufferSize     7929856
       dwDefaultFrameInterval         500000
       bFrameIntervalType                  1
       dwFrameInterval( 0)            500000
     VideoStreaming Interface Descriptor:
       bLength                             6
       bDescriptorType                    36
       bDescriptorSubtype                 13 (COLORFORMAT)
       bColorPrimaries                     1 (BT.709,sRGB)
       bTransferCharacteristics            1 (BT.709)
       bMatrixCoefficients                 4 (SMPTE 170M (BT.601))
   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     0x00c0  1x 192 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     0x0180  1x 384 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     0x0200  1x 512 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     0x0280  1x 640 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     0x0320  1x 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     0x03b0  1x 944 bytes
       bInterval               1
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting       7
     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     0x0a80  2x 640 bytes
       bInterval               1
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting       8
     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       9
     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     0x0be0  2x 992 bytes
       bInterval               1
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting      10
     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     0x13c0  3x 960 bytes
       bInterval               1
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting      11
     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     0x13fc  3x 1020 bytes
       bInterval               1
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
can't get debug descriptor: Resource temporarily unavailable
Device Status:     0x0000
 (Bus Powered)

好吧，原則上它被認為是網路攝像頭：

kernel: uvcvideo: Found UVC 1.00 device DP 5M CAM (2b16:6689)

如果相機有一個“快照”鍵，它也被辨識為鍵盤並沒有什麼不尋常的。我的相機也是如此。

所以問題變成了為什麼除了最初的辨識之外uvcvideo，cheese無法找到它。您發布的摘錄下方是否有任何與 uvc 或影片設備相關的消息？可能是錯誤資訊？

您看到多少設備ls /dev/video*？如果你lsusb -vv為相機做點什麼有什麼特別的嗎？

引用自：https://unix.stackexchange.com/questions/647654