MY fn + f10 key works correctly :
➜ ~ sudo acpi_listen
wmi PNP0C14:02 000000ff 00000000
➜ ~ v4l2-ctl --list-devices
USB2.0 FHD UVC WebCam: USB2.0 F (usb-0000:00:14.0-8): /dev/video0 /dev/video1 /dev/video2 /dev/video3 /dev/media0 /dev/media1but my key light always on and the camera not working I test camera with:snapshot and cheese