Database Develop

Lowering down frequency of CPU - if unused.

Hello,
I saw somewhere on some PocketPC application that was lowering down frequency of CPU if device was unused - because of saving battery.
(sorry for my poor english)
I'd like to ask you if:
- is it possible and working (saving energy)?
- isn't it unhealthy for CPU?
Maybe I am just wrong but it sounds cool to me.
Thanks for answer!

iv heard of that before, i think its called *speed stepping* dont quote me on tht.and intel use it on there cpu's but i dont knw if a phne would support such a thing.it does and would save enerrgy by reducing the clock speed of the cpu it can use less volts at the core etc
now that you have said that...i wonder if you could over clock the cpu on a ppc???
would void warranty and the usual but would be good for certain handsets.
sorry i havent actualy answered ur question though
D

4n60 said:
Hello,
I saw somewhere on some PocketPC application that was lowering down frequency of CPU if device was unused - because of saving battery.
(sorry for my poor english)
I'd like to ask you if:
- is it possible and working (saving energy)?
- isn't it unhealthy for CPU?
Maybe I am just wrong but it sounds cool to me.
Thanks for answer!
Click to expand...
Click to collapse
There is no way to Overclock the Kaiser so there will be no way to Underclock the Kaiser from what i have read.

4n60 said:
- is it possible and working (saving energy)?
Click to expand...
Click to collapse
Yes for some PocketPCs, but it's depending on the CPU, and there's currently no solution for the Kaiser.
4n60 said:
- isn't it unhealthy for CPU?
Click to expand...
Click to collapse
Nope. I've over/underclocked most of my previous PDAs.
However I was more often overclocking than underclocking, as those devices are already slow enough. Unless you use it like an MP3 player for hours without doing anything else, with screen off, and where you know you need long battery life, it's just not worth having to put up with a device that is slow as hell for minor savings. There's not only the CPU drawing power there - even slowing it down by 2 won't save you much more than 10-20% power when in normal use with screen on... the backlight will already draw more than the CPU at normal speed.
Actually you might end up using more energy with the device underclocked, as you'll be staring at that lit up screen for longer while it *tries* to do what you asked it to
When "unused" as you mentioned in the title - which I understand would be when it is in your pocket doing nothing - the CPU is already in sleep mode and not running, so no such savings possible here.

Thanks for replying...
I was overlocking too some of my ppcs but it wasn't useful everytimes... (freezing etc...)
I was worried about underclocking - I don't have any experience with this...
Ok, now I got it.
Well - cool and fast PDA = daily charging...
Thanks again...
BTW: I can't turn off backlight in my kaiser. It isn't possible ?

4n60 said:
Thanks for replying...
BTW: I can't turn off backlight in my kaiser. It isn't possible ?
Click to expand...
Click to collapse
No unfortunatly it's not possible. This is my first PDA which does not allow to turn off the backlight. You can just put it as low as possible.

You may not be able to shut off the backlight, but with S2U2, you can set it to lock when you shut off the screen, thus allowing you more power saving.
But as for idling saving you power, if you have TCPMP player, you'll notice that it can read the processor speed somewhere below 400MHz. The processor's designed to automaticly adjust to save power. I once saw mine running at 195MHz.
It may not be possible to manually control, but it does do it automaticly. And underclocking actually increases the life span of the CPU.

[request, forum] setcpu configuration

Hello, anyone know how to configure setcpu to save the battery while maintaining a smooth flow of the phone?
I saw that we could create "rules": those who did, can you post your configuration.
Thank you

Yes, i've good settings!
Profile: Auto-detect
Max 998400
Min 245000
CPU Governor On demand
Set on boot checked
Profiles on
Sleep/standby enabled
Max 245
Min 245
Battery profiles
Power <30%
768 Max
245 Min
These are same settings as teknologist have. This is the man who did the kernel for MCR ROMs. In my eyes he is a god in this things. So I belive him full!

see this and I think should be added here. http://www.pokedev.com/setcpu/

Formel-LMS said:
Yes, i've good settings!
Profile: Auto-detect
Max 998400
Min 245000
CPU Governor On demand
Set on boot checked
Profiles on
Sleep/standby enabled
Max 245
Min 245
Battery profiles
Power <30%
768 Max
245 Min
These are same settings as teknologist have. This is the man who did the kernel for MCR ROMs. In my eyes he is a god in this things. So I belive him full!
Click to expand...
Click to collapse
With this configuration, you save the battery?

If yu wanna have the longest battery time, just use all 245/245 Mhz.
But this makes no sense.
I think you wanna have it between battery/speed, isn't it?

Formel-LMS said:
If yu wanna have the longest battery time, just use all 245/245 Mhz.
But this makes no sense.
I think you wanna have it between battery/speed, isn't it?
Click to expand...
Click to collapse
obviously! I want my battery will hold at least two days! I will try your setup throughout the weekend and I'll make a return Monday.
thx

tcastel said:
obviously! I want my battery will hold at least two days! I will try your setup throughout the weekend and I'll make a return Monday.
thx
Click to expand...
Click to collapse
Don't hold your breath. Im being serious here. It wont last unless it sits in standby most of the time and then you're still pushing it.
Spend the 25$ extra and get a second battery.

2 DAYS?! Let me know if you are able to accomplish that somehow! I've tried everything; ROMS, Kernels, Juice Defender, SetCPU, anything you can think of and about the best I can get is 15-16 hours with moderate to heavy usage. I think I am actually going to buy a spare battery today.

.. that's not hard to do, 2days... even more.
Just stop all apps to update, stop auto sync, stop background sync...
you will be surprised*

I knocked down my cpu to 500 or so in all conditions, phone still feels responsive.
If you want two days, turn off 3g, turn off sync, turn off brightness. You'll not only get great battery life but a $600 dumbphone to boot!

this is what you need to do...
sleep/standby 245min 245 max cpu governer: powersave
charging 245min 883 max cpu governer: on demand
'normal': 460min 998max cpu governer: conservative
if u find that with normal use the phone isnt as snappy as it used to be, and this bothers u, then change the cpu governer back to on demand for the normal profile.
i've had amazing battery life since i tried these settings.
Also....some apps prevent the phone from sleeping so keep an eye out if ur battery is just literally disappearing!

Setting the max too low on any profile is not a good idea. This can cause tasks to take too long to complete and queues and memory to fill. This can make your phone unstable and arguably increase battery usage due to increased management overheads.
Some overhead above minimum is always preferable. I would consider anything less than 245/576 quite extreme and normally undesirable.

djmcnz said:
Setting the max too low on any profile is not a good idea. This can cause tasks to take too long to complete and queues and memory to fill. This can make your phone unstable and arguably increase battery usage due to increased management overheads.
Some overhead above minimum is always preferable. I would consider anything less than 245/576 quite extreme and normally undesirable.
Click to expand...
Click to collapse
yeah i heard about this but i have never encountered any problems. obviously its different for everyone but i would say try 245/245...if your getting too much drain with the phone on standby then use 245/576 with on demand governor.

Formel-LMS said:
Yes, i've good settings!
Profile: Auto-detect
Max 998400
Min 245000
CPU Governor On demand
Set on boot checked
Profiles on
Sleep/standby enabled
Max 245
Min 245
Battery profiles
Power <30%
768 Max
245 Min
These are same settings as teknologist have. This is the man who did the kernel for MCR ROMs. In my eyes he is a god in this things. So I belive him full!
Click to expand...
Click to collapse
I do not see much difference!!

tcastel said:
I do not see much difference!!
Click to expand...
Click to collapse
To be honest everyone "thinks" you can see a night and say difference just by tweaking the clock's and installing more efficient kernels. You can't and wont.
Those things may save you 5-10% over the course of a day but don't expect miracles. If you look at your battery history information you'll see that the system and any CPU related item can become relatively low doing all the efficiency modifications yet the battery still poops too soon.
Now look at the display. Thats where it's all going and as far as I know there is nothing anyone can do about that on our side. I run with the display back lighting 100% OFF and it still shows at a HUGE portion of my energy use. ~50% and sometimes more.
The day we get more efficient screen technology is the day we will be able to possibly use these things for 2 days on one charge... Either that or more powerful battery technology.

You know guys, I only have 3 scales on the application. Userspace, ondemand, and performance. I also have no idea what Priority means and how high or low to put them for a good profile! What do I do?

ma1993 said:
You know guys, I only have 3 scales on the application. Userspace, ondemand, and performance. I also have no idea what Priority means and how high or low to put them for a good profile! What do I do?
Click to expand...
Click to collapse
Set a default scaling type that suits you, typically On Demand or Uberspace and then set up your profiles. All of your profiles can use the same scaling (mine do).
The set your profile priorities in the order you want them to apply, 100 is the highest priority. For example, you might want the phone to run with less overclock when the battery is low and you want this condition to apply all of the time then you would give it a higher priority than other rules so it always executes. A better example might be a temperature profile. If the phone is hot you want to clock it down and want this to NEVER be overridden by another profile then you would set this to very high (say 99) so it could NOT be substituted by another rule.

Setcpu Profiles

Hey guys, I want to know what should I set my profiles to in order to save battery but at the same time keep the device running fast?

I use 648 max 192 min on ondemand, and I have no problem running anything at all, including Sense 3.6.

But how is your battery life and what rom are you using?

phil15_92 said:
But how is your battery life and what rom are you using?
Click to expand...
Click to collapse
End the day roughly at 60% battery. Just on a rooted version of Telstra's stock ICS, fully odex'd.

any of you guys see that setcpu always asks for permission from su
i remember from my inspire days that it didnt do that...

I have mine max 1026000 min 594
Profiles-- screen off max 540 min 486
Conservative

randong said:
any of you guys see that setcpu always asks for permission from su
i remember from my inspire days that it didnt do that...
Click to expand...
Click to collapse
I see it. Every so often it pops up at the bottom of the screen that it has acquired root permission. I'm concerned that something is causing setcpu to restart unnecessarily.

[Q] cappy turnes off when charging

The tittle says it all when my phone is at like 90 something percent it tends to turn off. At first I thought it was a from problem but I switched and it continued. Can anyone tell me what to do?

phillytothemax said:
The tittle says it all when my phone is at like 90 something percent it tends to turn off. At first I thought it was a from problem but I switched and it continued. Can anyone tell me what to do?
Click to expand...
Click to collapse
Seems like a charge of death. Try changing kernel. What kernel are you currently running?

Cm9 kernel. I only use miui and roms from teamhacksung . But I just saw that both if them are getting new kernels.

Charge death has happened to me on all ICS roms.
What worked for me was to create a profile to set minCPU to at least 200MHz while charging (mine is 240MHz since I have it OC to 1200MHz).
AND, just in case you have this too, to prevent sleep death I also set the min to 240MHz when battery it higher than 75% (or you can used Captivate Keep Alive)

Thanks I'll try that.

Setting the min CPU to 200MHz, and upping the voltage of the 200MHz step to 1025 mV seemed to help for me. I was getting the deaths at lower voltages.

OMG. 1025mV for 200. You can also check my ROM OP for voltage settings.
And how old is your battery? May be its worth going thru full discharge/recharge cycle.
They Drew First Blood said:
Setting the min CPU to 200MHz, and upping the voltage of the 200MHz step to 1025 mV seemed to help for me. I was getting the deaths at lower voltages.
Click to expand...
Click to collapse

7 or so months
Sent from my SGH-I897 using XDA

1GHZ bug in stock ROM?

The last days my girlfriend is complaining about battery drain in her i8190. I installed No-Frills CPU and it seems that the min CPU frequency is stuck at 1GHZ. Applying the 200MHz setting does nothing, when i restart the app i see that the min freq is 1ghz again. The phone is with stock rooted firmware (XXAMJ3).
Any ideas about this really annoying problem?

Flash framework in odin
send for I8190N CM11 using XDA Premium 4 mobile app

pang34 said:
Flash framework in odin
send for I8190N CM11 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Thanks for your answer but i am a newbie fish i didn't understand that. What am i supposed to flash?

@volanis1980
Tell your girlfriend, she should reboot her phone with Wi-FI OFF. This will solve the problem

xXPR0T0TYPEXx said:
@volanis1980
Tell your girlfriend, she should reboot her phone with Wi-FI OFF. This will solve the problem
Click to expand...
Click to collapse
Unfortunately that didn't work! Any other ideas?

volanis1980 said:
Unfortunately that didn't work! Any other ideas?
Click to expand...
Click to collapse
Did you or your girlfriend change the CPU governor to performance? No-frills CPU control can change the CPU governor. Try it out
Or
Set the phone in airplane mode and reboot the phone if it still didn't work then please attach/send some screenshots from the battery statistics in settings > battery in this thread.
P.S : Download "CPU spy" from play store and check if only 1GHz is in use.

She hasn't change the cpu governor (was with ondemand). The trick with airplane mode didn't work either!
These are two screens from no frills and cpuz where you can see the problem. I checked yesterday the real battery performance, it didn't seem that bad. Was 100% to 35% in about 9 hours with 2 hours screen on time. But isn't that strange, the min freq bug?

volanis1980 said:
She hasn't change the cpu governor (was with ondemand). The trick with airplane mode didn't work either!
These are two screens from no frills and cpuz where you can see the problem. I checked yesterday the real battery performance, it didn't seem that bad. Was 100% to 35% in about 9 hours with 2 hours screen on time. But isn't that strange, the min freq bug?
Click to expand...
Click to collapse
that is an unnormal behaviour. I think it is app-related.
try THIS to see which apk´s wake your phone up.

I installed wakelock detector but i don't see something strange.
Really frustrating, i can't find any solution!

volanis1980 said:
I installed wakelock detector but i don't see something strange.
Really frustrating, i can't find any solution!
Click to expand...
Click to collapse
noLED 107x (a playing tool in my opinion)
Handcent 104x (stoneage)
... many wakelocks
btw who uses sms in this time ?
use threema and greenify noLED
m.

if you still have problem try to change govenor and i/o schedular then switch wifi off then reboot.