On Sat, 5 Sep 2020 at 06:08, Patrick Dupre <pdupre@gmx.com> wrote:
Hello,

How do I turn on the camera of the laptop?

https://appuals.com/enable-disable-webcam-linux/

Laptop cameras are often USB devices.   Some laptops disable cameras (for security) 
with obscure function keys or possibly BIOS settings.  Since laptops are power-challenged, 
they usually turn the camera off when it is not being used. You should see a USB camera 
device with lsusb if the camera is active.   You can search for the linux module using the 
USB ID's.   Searching for linux configuration reports for your laptop model may give useful
details.   A recent model laptop may not yet have a linux camera driver.

https://wiki.ubuntu.com/SkypeWebCams has a long list of cameras (including integrated 
laptop models)  that are known to work in linux.

--
George N. White III