USB camera not identified

Question

I have a laptop camera wired to a USB cable. This camera works properly on my Ubuntu laptop. However, it does not on the pi.

I have a Raspberry PI 4 (4GB) with Raspbian OS lite installed.

I installed fswebcam which upon execution gives below error:

--- Opening /dev/video0...
stat: No such file or directory

I see video10...video16 under /dev.

I checked dmesg I don't see any trace of the USB device being plugged in. Also, lsusb command does not list the device.

Some where I found following command vcgencmd get_camera which gives: supported=1 detected=0

I tried enabling the camera module from raspi-config with no changes in the outcome.

Just for the information, below is the output of dmesg from Ubuntu laptop where this camera works:

and output of lsusb: Bus 001 Device 014: ID 05ca:18c3 Ricoh Co., Ltd USB2.0 Camera

EDIT

This morning somehow the camera attached message was logged in the dmesg but the command fswebcam gave following error:

--- Opening /dev/video0...
Trying source module v4l2...
/dev/video0 opened.
No input was specified, using the first.
Adjusting resolution from 384x288 to 320x240.
--- Capturing frame...
VIDIOC_DQBUF: No such device
No frames captured.

However, the camera still does not show under lsusb. This is completely out of my understanding.

---

Error when I connected again

[86585.292297] usb 1-1.3: new full-speed USB device number 43 using xhci_hcd
[86585.392723] usb 1-1.3: Device not responding to setup address.
[86585.612567] usb 1-1.3: Device not responding to setup address.
[86585.832347] usb 1-1.3: device not accepting address 43, error -71
[86585.932352] usb 1-1.3: new high-speed USB device number 44 using xhci_hcd
[86586.068596] usb 1-1.3: New USB device found, idVendor=05ca, idProduct=18c3, bcdDevice= 0.12
[86586.068617] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[86586.068636] usb 1-1.3: Product: USB2.0 Camera
[86586.068654] usb 1-1.3: Manufacturer: LOEA11P2BF13831Y06776
[86586.070871] uvcvideo: Found UVC 1.00 device USB2.0 Camera (05ca:18c3)
[86586.076148] input: USB2.0 Camera: USB2.0 Camera as /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.3/1-1.3:1.0/input/input6
[86586.217797] usb 1-1.3: USB disconnect, device number 44
[86586.742365] usb 1-1.3: new high-speed USB device number 45 using xhci_hcd
[86586.888646] usb 1-1.3: New USB device found, idVendor=05ca, idProduct=18c3, bcdDevice= 0.12
[86586.888669] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[86586.888688] usb 1-1.3: Product: USB2.0 Camera
[86586.888705] usb 1-1.3: Manufacturer: LOEA11P2BF13831Y06776
[86586.890901] uvcvideo: Found UVC 1.00 device USB2.0 Camera (05ca:18c3)
[86586.896023] input: USB2.0 Camera: USB2.0 Camera as /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.3/1-1.3:1.0/input/input7
[86587.754272] usb 1-1.3: USB disconnect, device number 45
[86588.652384] usb 1-1.3: new high-speed USB device number 46 using xhci_hcd
[86588.788655] usb 1-1.3: New USB device found, idVendor=05ca, idProduct=18c3, bcdDevice= 0.12
[86588.788677] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[86588.788695] usb 1-1.3: Product: USB2.0 Camera
[86588.788713] usb 1-1.3: Manufacturer: LOEA11P2BF13831Y06776
[86588.790873] uvcvideo: Found UVC 1.00 device USB2.0 Camera (05ca:18c3)
[86588.795971] input: USB2.0 Camera: USB2.0 Camera as /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.3/1-1.3:1.0/input/input8
[86589.066736] usb 1-1.3: USB disconnect, device number 46
[86589.512397] usb 1-1.3: new high-speed USB device number 47 using xhci_hcd
[86589.648675] usb 1-1.3: New USB device found, idVendor=05ca, idProduct=18c3, bcdDevice= 0.12
[86589.648696] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[86589.648714] usb 1-1.3: Product: USB2.0 Camera
[86589.648732] usb 1-1.3: Manufacturer: LOEA11P2BF13831Y06776
[86589.650922] uvcvideo: Found UVC 1.00 device USB2.0 Camera (05ca:18c3)
[86589.656001] input: USB2.0 Camera: USB2.0 Camera as /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.3/1-1.3:1.0/input/input9
[86590.090358] usb 1-1.3: USB disconnect, device number 47

Answer 1

According to the log, the camera connects to the bus and then immediately disconnects. I'd say a power issue is most likely.

Disconnect all USB devices and plug just the webcam, see if it stays connected in that case. Try shorter cables to supply power to the Pi, or a different power supply.

If you have a multimeter, check the voltage on the 5V pin, and, if possible on USB 5V pin. Any value below 5V is possibly bad, because the multimeter only shows the average value, and you need safety margin to cover eventual voltage dips.

Try plugging the webcam in each of the USB ports, perhaps one of them is damaged and the electrical contact inside is intermittent.