On Mon, 19 Jun 2006, Matt Britt wrote:

> On Mon, 2006-06-19 at 11:51 -0400, Alan Stern wrote:
> > The kernel does not control the amount of current available on a 
> > computer's USB port.  So long as the port is turned on, the full 500 mA is 
> > available.  Or if it isn't, it's a limitation of the hardware and not of 
> > the kernel.
> > 
> > Alan Stern
> 
> I sort of gathered as much, thanks for the affirmation.  Any ideas as to
> why the hardware isn't providing the power?  I can run high power
> devices like hard disks off the ports fine.

I don't know.  It's possible that the hardware is designed not to provide 
more than 100 mA until the port is enabled.

Alan Stern




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