Igor Stoppa wrote: >> I thought it can be half of power >> consumption on such devices. It was like that on ipaq 3870 I had. I >> remeber something like 80mA when display off ~130mA minimum brightness >> ~200mA full brightness, ~300mA full brightness + 100%CPU (not sure about >> exact values, it is long time ago, it was available as file in /proc in >> Familiar linux). On N770 I cannot check easily since some parts of power >> management is ... guess what? There is this myth about hidden power >> management ;-) > Nothinig prevents you from creating a sysfs entry wich returns > > tahvo_get_backlight_level() > > or even a proc one, if you really are into that sort of thing. There is such entry - /sys/devices/platform/omapfb/panel/backlight_level I meant way to get discharge current from battery circuit to know what is actual consumption of the device and how big is the influence of various parts. This is easy to get on laptops and it was possible on iPAQ but is currently kept very close to Nokia's chest. Yes one can measure it but it would need some tools, reading some register is much easier. Would be also good guide for programmers implementing proper idle state. I would be interested in difference betwen SD/MMC vs internal flash I/O (i.e. how does rootfs on MMC affect battery life) but other things are equally interesting to know (wlan transmit/receive, sound, DSP on, DSP vs main CPU doing similar stuff ...). Frantisek
