RFC: powerd Patch & proposed future changes
aragon at phat.za.net
Mon Jul 6 12:55:39 UTC 2009
Rene Schickbauer wrote:
>> I think this is a very nice idea, especially the TFT backlight part. It
>> also might be useful to adjust the WiFi transmit power level according
>> to battery state. That can also save some power, especially on
> Yes, changing the transmit power would be possible. Although adjusting the
> transmit power via script on a *mobile* computer is likely to get the user
> offline rather quickly.
> On the other hand, powerd would just run a script. This script could start a
> user-written daemon to continually adjust power level.. and when ac is
> plugged in again, the script kills that daemon. I sincerely doubt that would
> save you any amount of power worth mentioning, though but may give you
> additional troubles. But maybe you could restrict an a/b/g card to b/g or a
> and thus save some power.
FWIW, changing transmit power on my Intel 4965 based system made zero
difference to overall power consumption.
More information about the freebsd-current