This is not something I have ever seen.
I also have two different 7 port hubs and they both work fine.

    -- Lennart

Peter Seebach wrote:

>This is a little weird, and could be sheer coincidence, but I have two devices
>that inexplicably depower sometimes while being used on a NetBSD box; both
>devices used to work just fine.  By possible coincidence, both are
>keyboard-like devices.  One is a USB keypad, the other is a PS/2 adapter.
>In both cases, the device will run fine for a while, and then, a while later,
>it'll suddenly be dead.  Unplugging it, and plugging it back in, fixes it.
>
>This may or may not be related to my ongoing problems with 7-port hubs and
>multi-function devices being utterly random and useless.  *sigh*.
>
>-s
>
>  
>