Webcam does not work, though it works on Windows

Hi :)

My webcam is not working. On Windows 10 it works fine, no problems. lsusb shows no webcam. Cheese says there is an error. Guvcview also runs without luck.

I am running Ubuntu 20.04 LTS. I am new to Ubuntu so my webcam has never worked, as far as I know.

This is a laptop, model ThinkPad X1 Tablet G2. It is an integrated webcam.

Below are some outputs of various commands (I have asked for help elsewhere, but nobody has been able to fix my problem):

Output of ls -lah /dev/video*:

Code:crw-rw----+ 1 root video 81, 0 nov. 1 21:00 /dev/video0
crw-rw----+ 1 root video 81, 1 nov. 1 21:00 /dev/video1
crw-rw----+ 1 root video 81, 14 nov. 1 21:00 /dev/video10
crw-rw----+ 1 root video 81, 15 nov. 1 21:00 /dev/video11
crw-rw----+ 1 root video 81, 16 nov. 1 21:00 /dev/video12
crw-rw----+ 1 root video 81, 17 nov. 1 21:00 /dev/video13
crw-rw----+ 1 root video 81, 2 nov. 1 21:00 /dev/video2
crw-rw----+ 1 root video 81, 3 nov. 1 21:00 /dev/video3
crw-rw----+ 1 root video 81, 8 nov. 1 21:00 /dev/video4
crw-rw----+ 1 root video 81, 9 nov. 1 21:00 /dev/video5
crw-rw----+ 1 root video 81, 10 nov. 1 21:00 /dev/video6
crw-rw----+ 1 root video 81, 11 nov. 1 21:00 /dev/video7
crw-rw----+ 1 root video 81, 12 nov. 1 21:00 /dev/video8
crw-rw----+ 1 root video 81, 13 nov. 1 21:00 /dev/video9Output of lsusb:

Code:Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 8087:0a2b Intel Corp.
Bus 001 Device 004: ID 17ef:60a3 Lenovo ThinkPad X1 Tablet Thin Keyboard Gen 2
Bus 001 Device 003: ID 046d:c52f Logitech, Inc. Unifying Receiver
Bus 001 Device 002: ID 1199:9079 Sierra Wireless, Inc. Sierra Wireless EM7455 Qualcomm Snapdragon X7 LTE-A
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubThanks a lot!