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-d...