CL1B power distribution
Benjamin M. Schwartz
bmschwar at fas.harvard.edu
Sun Apr 26 00:40:14 EDT 2009
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John Watlington wrote:
> Quick straw poll on how many people think it is useful enough have
> control over the power supplied to each connector to raise the cost
> of the laptop
> by $0.15 ?
Turning off a single port to which nothing is connected saves no power,
right? I don't see the appeal. Maybe for deactivating power to passive
devices (e.g. usb sticks) during suspend, but such devices are cheap to
power anyway, and may not shut down cleanly if their power supply is
killed. Moreover, I am persuaded by your argument that the software is
unlikely to get smart enough to use it.
Also, these "switches" are actually transistors, with some leakage current
and some effective resistance, right? So it seems like we pay for the
flexibility of these switches with a small increase in power requirements.
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