Thunderbolt not working

[Ngdaz]

Hi, I've tested thunderbolt 3 with my M27Q monitor and I can't make my T490 to export display through USB C port in the monitor (using supported type C cable, Baseus-20GB-240W-cable). In setting I can see my monitor show up with correct name, I can change the Refresh rate, Color profile and resolution, event I can change arrangement of each monitor. But still get black screen and the monitor reported: no signal from type C port. Is there any way to fix it? :(((((((

p/s: not work with ugreen type c to HDMI hub too, but show up correct monitor in the setting

[5T33Z0]

I don't have a USB Type-C Hub and Thunderbolt devices, so I can't test this. Try to disable ports.aml and the ACPI/delete rule for dropping the original port mapping and enable the USB.ports kext instead. If this doesn't help you have to generate your own USB ports kext. If I am not mistaken, Thunderbolt devices need to be flashed with custom firmware in order to work with macOS.

[Ngdaz]

Thank you I will try

[Ngdaz]

Hey @5T33Z0, I found it. The power type c port works. I can export display through it and now the Thunderbolt port works as power for my laptop LoL

[Ngdaz]

New update, now I switch back to the correct port and it works. So weird lol

[5T33Z0]

Ok. Did you change anything to make it work?

[Ngdaz]

I've tried to use SSDT Thunderbolt from this repo but now I have removed it and use only your EFI, it's till works https://github.com/tylernguyen/x1c6-hackintosh

[Ngdaz]

So my solution is to plug the Thunderbolt device in the power and the power cable into the Thunderbolt port, then switch back. Now both HDMI and Thunderbolt ports work for me to use 2 monitors also with Clamshell mode

[Ngdaz]