Aloisio Almeida wrote:
Hi all,
I noticed that wireless devices are always scanning, and this is very
bad to power consuption in embedded systems.
Having looked at Wi-Fi power consumption last year while working on a
MID project, we did some measurements with a Marvell SD8686 card and
found that backing off the scanning didnd't really save all that much
power compared to when the device was associated with an AP and PS-Mode
was enabled.
This led us to the conclusion that the only way to really save power
while unassociated ( at least with the SD8686 ) was to toggle the power
to the card when NM was in it's inactive phase ( ie. not associated, and
not currently scanning ).
I haven't looked to closely at NM 0.7 to see how applicable this
approach is, but if I get some time, I'll try and do so...
Any comments? Is it a good way to implement that?
In the past, Dan has stated that he's against making scanning directly
controllable via DBUS.
Ciao,
/tony
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