maemo.org - Talk - View Single Post - Saving battery power with underclocking, low voltage etc.

	Gusse	2010-04-20 , 09:56
	Posts: 168 \| Thanked: 206 times \| Joined on Apr 2010 @ Finland	#56

Is there a way to include a script (to tune kernel setting) when display is locked automatically (i.e. after 1min, in settings/display).

Settings when device is active:
(freq range 500-850MHz)

Code:

echo 850000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
echo "125000 250000" > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies

Settings when device is in-active (i.e idle &. night times):
(freq range: 125 or 500MHz)

Code:

echo 500000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
echo "250000 550000 600000 700000 750000 805000 850000" > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies

Can keyboard slide ( slide GPIO 71) or lock (kb_lock GPIO 113) switch events be used as triggers for scripts? If yes, how?

Alarmd or fcron could be used to set these on/off, but I would like more dynamic way to set kernel tunings. Any ideas?

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