On 2/4/21 2:00 PM, linux guy wrote:
One other symptom: the power lights on my USB wired keyboard did not light up when I was plugging it into the USB3 ports.  They now light up when plugged into the USB2 port.


     lsusb -t  shows  physical usb device hierarchy as a tree. this may help to narrow down the issue.

https://www.blackmoreops.com/2014/08/25/identify-pci-usb-wired-wireless-driver-linux-identify-usb-driver/
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