How to underclock?
Thanks
underclocking only improves active and idle battery life. it has no effect on sleep battery life as your device should be running at 0mhz when sleeping until awoken. or so it was when i was messing with the clocks on my old n900. i would assume android would be similar.
the only time it would have any effect would be if your phone is not going into deep sleep. ie. an app is boot looping, or youre downloading, or you've left wifi/bluetooth/gps on. then it may improve battery life a little.
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I have been using setiron's reoriented kernel for awhile now with the Voltage control app set at -75mV for 100, 200, & 400mhz and -50mV for all other frequencies. I am not having any stability issues and the voltages are sticking after reboot. However, I was expecting a pretty significant increase in battery life due to the undervolting and I have seen next to nothing. Battery life is not bad by any means but in real world use is pretty comparable to what I was getting at stock voltage.
people seem to be reporting really big increases in battery life, so I'm a little confused. have I not UV'd by enough? if that were the case I would expect to see at least some battery improvement.
I wiped battery stats/recalibrated the battery when I flashed. I do have BLN enabled, but my understanding is that this causes a really small amount of battery drain. any thoughts?
How much % of battery you loose after night|?
while idle with the screen off (background data enabled) I lose about 1-2% per hour. I lost 10% overnight most recently and I was asleep for 7 hours. that is about the same that I was getting at stock voltage.
all i can sya, is thst you losing not many %
tehsam said:
while idle with the screen off (background data enabled) I lose about 1-2% per hour. I lost 10% overnight most recently and I was asleep for 7 hours. that is about the same that I was getting at stock voltage.
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If you are in a weaker signal area, then the cell phone radio is going to work just as hard no matter what the CPU voltage.
tehsam said:
I have been using setiron's reoriented kernel for awhile now with the Voltage control app set at -75mV for 100, 200, & 400mhz and -50mV for all other frequencies. I am not having any stability issues and the voltages are sticking after reboot. However, I was expecting a pretty significant increase in battery life due to the undervolting and I have seen next to nothing. Battery life is not bad by any means but in real world use is pretty comparable to what I was getting at stock voltage.
people seem to be reporting really big increases in battery life, so I'm a little confused. have I not UV'd by enough? if that were the case I would expect to see at least some battery improvement.
I wiped battery stats/recalibrated the battery when I flashed. I do have BLN enabled, but my understanding is that this causes a really small amount of battery drain. any thoughts?
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Battery drain can be a symptom of i9000 kernel and captivate modem.
Changing the modem and keeping 850mhz is a multi step process. I tried the kernel you are talking about but it's over rated.
if you want battery life flash a 2.1 rom and use unhelpful's kernel, 1.4.1 was the most stable on my phone but it doesn't have voodoo. 1.6 has voodoo and 1.7 has voodoo and clockwork recovery if I remember right. But I had random restarts, others did not report the same problems so who knows.
I would wait for captivate froyo source to drop. I'm getting decent life with cognition and no undervolting.
Edit after reading the whole thread your battery life seems normal, I don't see any problem, you can try more undervolt but test the phone completely. Make sure it doesn't freeze randomly, or on shutdown. Also test it with the charger plugged in, extra heat from the battery charging can affect stability.
Sent from my SAMSUNG-SGH-I897
It's very saddening but this is the case for me.
I have battery saver app installed but it doesn't help very much.
Is there any good power saving tips or perhaps a ROM really good for battery life?
can I replace my TP's battery?
What ROM are you using?
fat n-creamy CM10
1) check your wifi sleep settings and ensure it is set to off when not in use
2) set your minimum frequency to 192 instead of 384. However some people have seen SODs when set at this frequency
3) Use better battery stats to see if there any wakelocks.
I am getting around 0.5% using JCSullins 20121216 CM10 build.
I've been running CM11 (feb 14 build) now for about 2 weeks with terrible battery drain during use. The phone gets really hot when i'm just browsing facebook or reading a news app.
I looked at the CPU usage and it seems it's either at max cpu, min cpu or deep sleep. That is strange first of all, it never or rarely uses the frequenceis in between. Then i took a look at the battery graph. When the phone is sleeping, the battery is holding really steady, but as soon as I start using it all hell breaks loose and the graph looks like an olympic downhill slope. The strange thing is that the main battery source is the screen which is odd beause on stock (With better battery life compared to this) Android System was the main battery killer.
I then took a look at BetteryBatteryStats. First thing i noticed: 50-50 deepsleep and awake which is pretty astounding.
The wakelocks are msm_hsic_host and PowerManagerService.Wakelocks. But this is strange because it's still pretty much a clean install.
So my theory is that the CPU governor is not functioning propperly and blasts to max cpu as soon as a wakelock is requested and when the phone is in use it also blasts max cpu. I don't know.. that's just what I think is happening with the data i have.
Any ideas?
I know that on all my phones I underclock them to be able to conserve as much battery life as I can. I was wanting to know how many other people underclock this device and what are the setups they are using? I, for example, am using LiquidSmooth v4 Nightly 12/23 and Sensei Kernel R26.1 underclocked at a max frequency of 1.1GHz. I have CPU hotplugging enabled and only use 2 cores.
What's your SOT with that set up? With the stock frequencies I can't get 6.5-7 hours SOT. I'm running LS 12/24 with Lean Kernel OCUC set at 300mhz-26496 I.e. (.3-2.7ghz) and the standard interactiveX Governor that is with it.
Why not just leave it in Battery Saver mode all the time?
Pilz said:
What's your SOT with that set up? With the stock frequencies I can't get 6.5-7 hours SOT. I'm running LS 12/24 with Lean Kernel OCUC set at 300mhz-26496 I.e. (.3-2.7ghz) and the standard interactiveX Governor that is with it.
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I can't remember actually. I meant to check that. I'll see after use tomorrow.
knitler said:
Why not just leave it in Battery Saver mode all the time?
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And I have a problem with battery saver mode on liquid smooth. It doesn't vibrate upon receiving a notification. And it seems like it only does that, and turns off animations and lowers brightness
jamcswain said:
And I have a problem with battery saver mode on liquid smooth. It doesn't vibrate upon receiving a notification. And it seems like it only does that, and turns off animations and lowers brightness
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I believe it also locks the CPU clock down and turns off auto-sync on accounts. On my phone if I use it it tells me I have like 3-4 days of battery left
I am currently under locked at 1958 and my battery life improved drastically. I'm using Set CPU. Here is a screenshot. I'm currently on Chroma. I havent noticed any lag what so ever.
Hey, was just wondering what settings you all have under Kernel Auditor in order to ensure 5 hours+ SOT. I personally have a dual core setup and have the other two cores kick in when the load gets to 90%, but this seems sort of sluggish now and I only get about 3.5-4 hours SOT and I don't play any games; just simple browsing and productivity. Others manage to get up to 5-6 hours SOT and I wonder how, I have NEVER been able to get this much. Standby is great though, 10 hours overnight and I lose only 3% battery. I am running on Pure Nexus Project ROM and latest Hells Core Kernel.
thats about the regular time I get outa mine. If I had to guess a lot of these 5+ hours are from watching videos or something that doesn't involve touching the screen. I've been using HC kernel with just zen decision on max performance settings and gpu on performance governor (since it idles 27mhz anyway might as well ramp up to full 600mhz for touches) for smoothness.
I have it setup that all my cores are on all the time, no hotplugging. ondemand/deadline, mpdecision disabled, fsync disabled. and I get 5+ hours sot every single day. no, I do not watch videos. but I do keep my brightness all the way down.
Hey, where do you go to disable fsync
aroy97 said:
Hey, where do you go to disable fsync
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it has to be an option in the kernel that youre using, at least the kernel has to expose it so that you can disable it. if its not xposed in general, then you cant disable it. im using despair kernel.
Try undervolting. Unless you severely under clock your cores you won't really see battery life improvement.
I keep my max CPU speed at 2803mhz. You might think "oh well if you're running higher frequencies then more battery drain". Not exactly. The difference between 2649mhz and 2803mhz will be negligible in terms of battery life so I'm seeing a slight performance increase with no significant battery loss. For example, on 2649mhz after a full day of normal usage I'd have about 49% battery life. On 2803mhz I'd have about 43%. I got a good performance increase and a more snappier device in terms of loading web pages, apps, opening documents etc so that extra 6% I lost doesn't matter to me, because its not significantly impacting me, I barely notice most of the time.
So yeah, the same goes for lowering CPU speeds to unless you significantly lower them. Putting max CPU speed to something like 2572mhz, you wouldn't even notice e the difference in battery. Now lowering it to like 1958mhz, or 2188mhz and you'll see a difference because at that point your severely under clocking.
You could also be draining your battery by hotplugging. That's why some people like Zen and MP Decision to keep all cores online when screen is on. If you use your device often, its better to have all cores running. If you don't and its kept in your pocket for hours at a time, hotplugging is the way to go.
Try under volting too. I do. Global Under Volt of -60.
TransportedMan said:
Try undervolting. Unless you severely under clock your cores you won't really see battery life improvement.
I keep my max CPU speed at 2803mhz. You might think "oh well if you're running higher frequencies then more battery drain". Not exactly. The difference between 2649mhz and 2803mhz will be negligible in terms of battery life so I'm seeing a slight performance increase with no significant battery loss. For example, on 2649mhz after a full day of normal usage I'd have about 49% battery life. On 2803mhz I'd have about 43%. I got a good performance increase and a more snappier device in terms of loading web pages, apps, opening documents etc so that extra 6% I lost doesn't matter to me, because its not significantly impacting me, I barely notice most of the time.
So yeah, the same goes for lowering CPU speeds to unless you significantly lower them. Putting max CPU speed to something like 2572mhz, you wouldn't even notice e the difference in battery. Now lowering it to like 1958mhz, or 2188mhz and you'll see a difference because at that point your severely under clocking.
You could also be draining your battery by hotplugging. That's why some people like Zen and MP Decision to keep all cores online when screen is on. If you use your device often, its better to have all cores running. If you don't and its kept in your pocket for hours at a time, hotplugging is the way to go.
Try under volting too. I do. Global Under Volt of -60.
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undervolting doesnt really save you battery, but it does reduce heat. and hotplugging or having all your cores on doesnt really factor in when you dont use your device that much. as, if you have all your cores on or hotplugging, your phone should be in deep sleep anyways. it does make a difference when your phone is awake. i get much better battery life when all my cores are on all the time.
Should there be a sticky of suggested settings of differing requirements of speed, battery life, etc?
ronaldheld said:
Should there be a sticky of suggested settings of differing requirements of speed, battery life, etc?
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honestly, I don't think so. as the settings/setup used is always dependent on how you actually use the device. and many people have different opinions on how it should be set up.