Re: USB devices fail unnecessarily on unpowered hubs

[linux-os (Dick Johnson)]

On Thu, 1 Jun 2006, Oliver Neukum wrote:

> Am Donnerstag, 1. Juni 2006 17:09 schrieb linux-os (Dick Johnson):
>> Many, most, perhaps all such devices don't take more power when they
>> are "enabled". Everything is already running and sucking up maximum
>> current when you plug it in! If the motherboard didn't smoke when
>
> If they do, they are violating the spec. A device in the unconfigured (state 0)
> state must not draw more than 100mA.
>
> 	Regards
> 		Oliver
>

Hmmm, the USB-IF recommends 100 mA per port, not requires.


Cheers,
Dick Johnson
Penguin : Linux version 2.6.16.4 on an i686 machine (5592.73 BogoMips).
New book: http://www.AbominableFirebug.com/
_


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