Did you see the camera lighted up when you open it in webcamtest? Can you attach your kernel log $ journalctl -k -b and $ cat /sys/class/dmi/id/product_sku
The packages are all installed properly. Have you tried oem image from Dell's website? If it doesn't work within Dell's oem image, I think you can request Dell to check the hardware.
Did you see the camera lighted up when you open it in webcamtest? Can you attach your kernel log $ journalctl -k -b and $ cat /sys/class/ dmi/id/ product_ sku
The packages are all installed properly. Have you tried oem image from Dell's website? If it doesn't work within Dell's oem image, I think you can request Dell to check the hardware.
https:/ /www.dell. com/community/ XPS/Can- t-download- XPS-13- Plus-Recovery- Image-Ubuntu/ td-p/8218080