dellpho, Regarding the BIOS, all should be sure that the provided external power adapter is plugged into the Laptop when you are booting into the BIOS. Unfortunately,  Dell does not support Linux on the XPS 7590 system. Only Windows 10 and Windows 11 are supported by Dell as shown on the specific Drivers page. You can refer to the Linux Dell community here for support or check out the Ubuntu Forums here
Hi friends, Have you ever encountered a 'slow BIOS?' As in when you finally get into the BIOS, it's extremely slow to navigate the menus. It freezes then continues every 15 to 20 seconds. This happens with my XPS 15 7590.  Also since a month or so ago, my internal webcam stopped working as well. I'm running a flavor of Ubuntu 21.10 (Linux) and if the webcam is enabled in the BIOS, after the OS starts up, there are 'failed to initialize' USB messages that flood the logs, so I ultimately had to disable the internal webcam (which took forever because of the extremely slow navigation mentioned above.) BIOS is running 1.14.1.  Thank you.
XPS 15 7590 (2019) - Extremely slow, choppy navigating BIOS menu and options - 
Slow boot time - Webcam no longer works - Linux