Hey, i had the same issue, an amazing Dell Rep gave me this instructions and now i have output through usb c, hope they can help you to, and everyone else facing this issue.   - Install the vBIOS for your computer. You can download the installation file here. Once done, restart your computer. - Go to Device Manager and under Display Adapter make sure that both GPUs, the Nvidia and the Intel, are enabled. - Go to Control Panel > Uninstall a program, and uninstall NVIDIA Graphics Driver, NVIDIA HD Audio Driver, NVIDIA PhysX System Driver, and NVIDIA USBC Driver. Restart the computer as needed. - Once back in Windows, reinstall the Nvidia graphics driver using GeForce Experience and test the external monitor again.
Hi all, I bought the computer two weeks ago. Yesterday, after a BIOS firmware 1.5.1 update (run by Windows), the Thunderbolt port is unusable. Whenever I connect a USB memory (using a Type-C hub) or a screen (using a Type-C to VGA adapter) it appears for a few seconds, (in Windows, I can hear the new device plugged-in sound effect), but after a few seconds, the device disappears (I can hear the disconnect sound effect). I tried to reinstall the BIOS firmware (I tested the 1.5.1 and 1.4.3 versions) and the drivers (video and thunderbolt drivers), but it did not fix the issue. Before the problem, my PC had firmware version 1.3.3. and all works fine. How can I downgrade the firmware version because once BIOS is upgraded to version 1.4.3 or later, you cannot downgrade the BIOS to earlier versions? Any idea? Thanks for helping me
m15 R6, BIOS 1.5.1 broke Thunderbolt 4.0 port