Logically connect/reconnect USB device

[komputes]

I second this request. I would also like to know if this is possible, 
how this is done. Is there a way to talk to the kernel from the command 
line. If that is the case, could we run a command that would make it 
refresh (turn off/on) power/data to a specific USB Bus.

NoOp wrote:
> Anyone know of a way to logically connect and reconnect a USB device
> without unplugging/plugging or turning off/on?
>
> Reason for asking is that VirtualBox (non-OSE) w/USB support is great.
> However, as once you've assigned the USB port to a VB guest machine (ala
> USB printer), use it, then release it, you can't get the device back on
> the host (Ubuntu) unless you unplug/plus / turn off/on again.
>
> Problem: I bring up VB & turn on a Win2K VM. I then logically attach my
> standard USB printer to the VM, use it for awhile, then logically
> unattach the printer. Switching back to the host, Ubuntu can no longer
> find the printer unless I turn the printer on/off or unplug/replug the
> USB port.
>
> I'd like to find a way to do this logically so that when I go back to
> Ubuntu from the VM the printer is then again available. Is there an
> init.d or polling command that could do this via software?
>
>
>