I BUY a 20-port usb hub, and a raspberry zero w;i Write the firmware on the raspberry.when i plug 20 usbs into hub.
i only see 8 device on the virtual here client list.
i have a window7 pc.i plug this hub into pc.i can see 20 device on the virtual here client list.
.
127 devices. If you see only 7 it might be the hub? Are you using one of the hubs from here https://elinux.org/RPi_Powered_USB_Hubs
USB Controller Bandwidth
USB Controller Bandwidth Exceeded。。。。system info these message。
.
Ok well theres your answer :) You should perhaps try a pi3 that has a better chip