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Would IOUSBHostFamily driver support Zen 3+'s added USB4 in near future? Thanks

Is there anyway to fix the issue of IOUSBHostFamily driver not recognizing AMD USB4? I think this issue leads to the forbidden icon after the bios hands the use controller to usb boot loaders. Thanks

My bios version is KFCN27WW。 Which bios version should I downgrade? And is there any possible way to downgrade legion bios? Thank you.

With zxc2689963's newly provided EFI, these KP has been resolved. But it comes with another KP following of USBMS identifiers non-unique with a forbidden icon. It may be related to USB controller of Ryzen 7 6000 has compatibility issues. But I have no idea how it could resolve. Would you kindly...

Is there any instructions to install the system from hard disk?

I have changed the ACPI file to my coustomized USB. But still get a forbidden icon after USBMS identifiers non-unique

I have tried various fix. By setting ncpi=0x2000 and ResizeAppleGPUBars to ‘-1’ I can go to the farest. I am having another stuck at here. Could you find any related KP?Plus zxc’s EFI patch could go further but got a forbidden icon after USBMC identifier non-unique. Is there any related KP on...

I had another problem, do I need to add npci=0x3000 from boot-args and set ResizeAppleGPUBars to 0. Some people suggests that change, while others suggests not. I am not very sure. Thank you

No, I didn't restart. I would try to wait another more 20-30 minutes to see whether it went through.

I have tried your EFI-3.zip in both use ports. But still gets the same error, it successfully handled ACPI Error, but it stuck at SMCTRC: start，the forbidden icon is the KP of another EFI provided by zxc2689963. I still haven't figured out both fixes. Thanks

Sorry, still have no idea how could I make it. This is my USB configuration files. Would you kindly make changes for me?Thanks

which file should I change? Thanks

Thank you for your help. I tried your EFI and got a forbidden icon after this.

Thank you for your fix. The original problem is resolved but it stuck at another place. Is there any fix for that?

After applying this change, the same error still exists

Still have no idea how could make it work. Would any one kindly provide further help?

No, I only plug a USB Flash as installer boot loader in USB port.

Still doesn’t work with error like this

it is set to 0

I just tried your EFI, it still gets another error message. My laptop type is https://www.lenovo.com/us/en/p/laptops/legion-laptops/legion-7-series/legion-slim-7-gen-7-(16-inch-amd)/len101g0019?org which is a little different from yours. And here is the DSDT that I dumped from my own laptop. I...