12-27-2024 03:46 AM - edited 01-10-2025 08:17 AM
This is a quite common issue I've seen reported many times online, and experienced myself with my SCAR 18 (2023): sometimes randomly (still uncertain how to reproduce it) you'll find the USB-C/Thunderbolt/DisplayPort port not working anymore and in Device Manager the yellow triangle for (example): UCM-UCSI ACPI (Error 43 ) + Intel(R) PC Express Root Port #25 - 7A48 + Intel(R) PC Express Root Port #9 - 7A30 (or similar). It won't go easily away with a simple Shutdown or after you disable/re-enable/uninstall these devices from Device Manager:
THE FIX
Don't worry, you don't need to RMA the laptop, just follow this procedure to get rid of those device errors and restore USB-C multi-port:
NOTE: your BIOS undervolting will survive this BIOS reset.
Enjoy your powerful laptop!
P.S.
ASUS should definitely investigate this common issue on their recent laptops anyway...