Hello, For those having some trouble getting this Thunderbolt port working after it stopped, here is a trick that worked for me. As mentioned above, previous/latest BIOS firmware, reinstalling thunderbolt drivers, Intel UHD, Nvidia USB-C, ... did not work but one thing worked was to hard resetting the power of the laptop: Basically, drain any residual power left in the laptop.  - Turn off your laptop, unplug the power cable, unplug any USB-C. - Press the power button for 15 - 20 seconds (My Laptop started when doing that). - Reboot with the power. And the thunderbolt will come back to life. [URL]
When the charger or a USB device is plugged into the Thunderbolt port on my XPS 15 it is not detected and when I plug them in to either of the USB ports I can charge my laptop or the device is USB device is found. What I have done:1) Watched the video "USB Devices Not Working Windows 10 DELL (Official Dell Tech Support)"[URL] First problem encountered with the video there is no “General Settings” on the BIOS and the setting that they mentioned I couldn't find it seems like the video hasn't been updated. 2) The I went into “msconfig” and all services were running. 3) Checked update history:May 10, 2022—KB5013942 (OS Builds 19042.1706, 19043.1706, and 19044.1706)May 10, 2022-KB5013624 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 20H2, Windows Server, version 20H2, Windows 10 Version 21H1, and Windows 10 Version 21H2 4) F12 went into boot config and ran “Diagnostics” and no problems were found with the USBs. 5) Stumped! What else can I try or is the USB-C dead. This is a new laptop and I bought it in November. Device: XPS 15 9500Device name Laptop4Processor Intel(R) Core(TM) i9-10885H CPU @ 2.40GHz 2.40 GHzInstalled RAM 32.0 GB (31.8 GB usable)Device ID 99CA00B2-DD01-4A3C-AF2C-4E4DABB76B81Product ID 00325-82231-35075-AAOEMSystem type 64-bit operating system, x64-based processorPen and touch Touch support with 10 touch pointsBIOS 1.14.0   Running:Edition Windows 10 HomeVersion 21H2Installed on ‎11/‎2/‎2021OS build 19044.1706Experience Windows Feature Experience Pack 120.2212.4170.0
Thunderbolt 3 port (USB-C) stopped working.