usb 1-1.2.1.2: reset high-speed USB device number 31 using ehci-pci uvcvideo: Found UVC 1.00 device C922 Pro Stream Webcam (046d:085c) usb 1-1.2.1.2: Product: C922 Pro Stream Webcam usb 1-1.2.1.2: New USB device strings: Mfr=0, Product=2, SerialNumber=1 usb 1-1.2.1.2: New USB device found, idVendor=046d, idProduct=085c, bcdDevice= 0.16 The following is the dmesg log for reference: The MaxPower is 500mA from the output of the "lsusb -v" command when it works I suspect that the webcam needs more power to start, and my laptop or the usb hub could not supply that much.īut I don't know how to confirm that, and when I use it with one usb hub with external power cable plugged in, it could not work stably too. Sometimes it could be recognized by the os, but for most time it could not be recognized with message in dmesg like this, not sure if you have any idea what's the problem there. I have the C922 Pro here too, but it does not work well with my ubuntu21.04
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