Comment # 9 on bug 967490 from Thomas Mitterfellner

This is what's in there after booting. (The light is now on though there's no
application using it)

root@linux:~> for i in /sys/bus/usb/devices/1-6:1.0/power/* ; do echo -n "$i: "
; cat $i ; done
/sys/bus/usb/devices/1-6:1.0/power/async: enabled
/sys/bus/usb/devices/1-6:1.0/power/runtime_active_kids: 0
/sys/bus/usb/devices/1-6:1.0/power/runtime_enabled: enabled
/sys/bus/usb/devices/1-6:1.0/power/runtime_status: suspended
/sys/bus/usb/devices/1-6:1.0/power/runtime_usage: 0

Interesting thing is: when I do lsusb -v, the light goes out!