During a Power Management session at the Ottawa Linux Symposium, it was
generally agreed that network interface drivers ought to automatically
suspend their devices (if possible) whenever:
(1) The interface is ifconfig'ed down, or
(2) No link is available.
Presumably (1) should be easy enough to implement. (2) might or might not
be feasible, depending on how much WOL support is available. (It might
not be feasible at all for wireless networking.) Still, there can be no
question that it would be a Good Thing for laptops to power-down their
ethernet controllers when the network cable is unplugged.
Has any progress been made in this direction? If not, a natural approach
would be to start with a reference implementation in one driver which
could then be copied to other drivers.
Any suggestions?
Alan Stern
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