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In some hardware path , USB Device was not found


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My image is (Armbian BookwormXFCE desktop 20230831) and download to cm4 moudule.


When I using the Bananapi CM4 base board ( https://wiki.banana-pi.org/File:BananaPi_BPI-CM4_base_board_1.jpg) the USB function is working.

But I using the common RPI CM4 base board, such as waveshare's cm4 nano-b (https://www.waveshare.net/wiki/CM4-NANO-B) the USB function is not working.


I compare the difference of two board's schematics. Bananapi's base board is connecting the fs1.1 usb hub ic. but waveshare's base board was connecting USB D+/D- to USB host directly . 

I also tried bananapi official image (both Debian and Ubuntu mate) and the wareshare's base board USB function is working.This is a bit confusing to me. Why can’t USB be found when connected USB D+ / D- directly in Armbian image?

How can i solve this problem? 




Bananpi base board SCH: https://drive.google.com/file/d/1IErCKqfWdU7gL7kUod2-wlpG7uE9EiVZ/view

waveshare base board SCH: https://www.waveshare.net/w/upload/f/f5/CM4-NANO-B-SCH.pdf

Edited by 陳柏儒
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