The VIMICRO chip used VC0345PLNAB seem to have good support within the linux kernel for quite some time with uvcvideo. Just for completeness as most online guide say to use this, I tried guvcview, the result is the same in that it triggers the usb disconnection. I’ve tried different drivers gspca_zc3xx vs uvcvideo. I’ve tried it on x86 and arm arcitectures. Sometimes i get error -31 instead of -71. I’ve tried the following kernels - same (or very similar) story with them all. usb usb4-port1: unable to enumerate USB device usb 4-1: device not accepting address 6, error -71 usb 4-1: new full-speed USB device number 6 using xhci-hcd usb 4-1: device not accepting address 5, error -71 usb 4-1: Device not responding to setup address. usb 4-1: new full-speed USB device number 5 using xhci-hcd usb 4-1: new full-speed USB device number 4 using xhci-hcd usb 4-1: device descriptor read/64, error -71 usb 4-1: new full-speed USB device number 3 using xhci-hcd usb 4-1: USB disconnect, device number 2 It drops off, I need to physcially remove it and plug in again. Then if i try an access it with just a command like: ~$ sudo v4l2-ctl -list-devices Uvcvideo: Found UVC 1.00 device Venus USB2.0 Camera (0ac8:3420)

Usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Usb 4-1: New USB device found, idVendor=0ac8, idProduct=3420 Usb 4-1: new high-speed USB device number 2 using xhci-hcd

Using linux (on raspberry pi, other arm based boards and x86), I’ve been testing this for a few days now.

Adafruit usb microscope driver