HUB Port Power Turned off, but device remains in lsusb ?

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Greetings,

I am using a custom composite usb device with a known hub. It has per
port power control, and when turned off i can confirm that the power
is indeed off (via volt measurement). However, doing a followup
"lsusb" the device still shows in the list. When i try to read the
detailed descriptors, the device reports a timeout, although it still
remains in lsusb list.

Is there some API i am missing to get khubd to pickup the change ?

I am using Libusb1.0 sending direct setFeature requests to the HUB.

Thoughts anyone ?

thanks,
-Lenny story
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