Re: SmartReflex- Battery Enhancement - The right way?
 

@craftyguy: that is right, I have read the white paper. I am wondering why there are two settings that control SmartReflex in Maemo? Some people were reporting that the order of commands matter.. so perhaps it would be worth trying turning just one of them on?

Re: SmartReflex- Battery Enhancement - The right way?
 

May be not - if you have some problem then you may fall in constant reboot loop after pmconfig editing. So - test it manually first.

Re: SmartReflex- Battery Enhancement - The right way?
 

VDD typically stands for 'voltage drain drain' (positive voltage supply) in semiconductors, my guess is this device(omap) has 2 :)

Re: SmartReflex- Battery Enhancement - The right way?
 

I reported - I just noticed a difference. I had no effect with regular order.

However, I didn't do a scientific measurement, and that may be a placebo. I am now in reverse order of setup.

(unfortunately, I recognized that OMAP 3430 power management in software is ... weel, not the best, so I am forced to live with unfinished assumptions...)

Re: SmartReflex- Battery Enhancement - The right way?
 

I have turned just /sys/power/sr_vdd1_autocomp to 1. I will see if I notice any difference. (Both of the settings on make my device act a little weird -- there are request timeouts on wifi that disappear with SmartReflex off).

Re: SmartReflex- Battery Enhancement - The right way?
 

I flashed my n900 with Lehto's 125-825MHz kernel and set the smart reflex on in pmconfig. The results are quite amazing. I also
set the ignore nice load to 1

echo "1" > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load

renice 1 `cat /syspart/applications/standby/background/tasks`
renice 1 `ps | grep modest | cut -c1-5`


Now my batterylife has increased threefold. Used to get max 16 hours if on idle most of the time now the battery holds for 24h with average usage and over 34h on idle with 1 hour of talking and 1hour opf surfing and some texting.

Re: SmartReflex- Battery Enhancement - The right way?
 

I have tried the above with the stock kernel, but it rendered modest unusable and audio shuttered when multitasking. I had to kill modest and rebooted to get back to normal...

Re: SmartReflex- Battery Enhancement - The right way?
 

You had something else. The niced applications never include audio stuff. And modest actually restarts itself then it goes to GUI mode and it loses "nice -1" value.

Note: I use only stock kernel.

Re: SmartReflex- Battery Enhancement - The right way?
 

Just a note - I don't personally have battery problems, so I won't comment on that.

You should do statistically sound tests before claiming improvements in battery life, because you could be doing something akin to a "self-placebo." (For those who don't know what that is, it's a medical term, you think you're getting better results because you were told it would, when in fact, nothing has changed.)

Re: SmartReflex- Battery Enhancement - The right way?
 

Ok VDD1 compensates for CPU voltage.
VDD2 compensates for I/O pins voltages.

In my case smartreflex works on VDD1, while it fails with VDD2.