I was thinking if there is a kernel for our Note II with support for double tap to wake feature.
I am not talking about something like Agni Kernel. It offers "touchwake" which lasts for a limited time and wakes the screen on a single touch.
Thanks In Advance.
As far as I know the touch wake is just keeping the phone from going into a deep sleep for that limited time and wanting it to always be active would just prevent the phone from ever sleeping and kill the battery
that would keep the touch sensor constantly awake, and would prevent the cpu from deep sleeping, thus killing the battery.
stevenbarash said:
that would keep the touch sensor constantly awake, and would prevent the cpu from deep sleeping, thus killing the battery.
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Yes, you are right. But it has an awesome battery life, which can go a little low for a great feature.
Many other devices have that and are delivering good enough battery life. I am not a developer, so I can not be sure how much would it affect the device. I just feel it is a pretty nifty feature, and it will be great to see on my device.
Related
I have been rooting for years but I never bothered to really mess with kernel settings to increase battery life. All I'd do is over clock or under clock. What do you guys do to increase battery life? Like for example, lower voltages? I have no clue exactly how this works. I'm kind of tired of carrying 2 spare batteries around lol I'm on Franco's kernel with the hot plug enabled from his app but I might switch to imo's. Anyone wanna be kind enough to help me out please?
I just got a 200mah battery and its animal.
Before I used APEX kernel and took the usual steps, dimmed the screen etc.
Thank you for the response. I'm sorry, I should have stated that I'm on the CDMA version lol
I've been considering a custom rom/kernel and reading up on them a bit. I'm pretty much a n00b, so maybe this is nothing new to you, but it seems that controlling kernel wakelocks and specialized cpu governor settings + undervolting are the main things that increase battery life. I think minimizing unnecessary wakelocks seems to be the main key.
For the most part, battery drain comes down to two issues:
1. Screen use (not much we can do here)
2. Radio use (which tends to wake up the phone unnecessarily, I think)
I think the radios -gps/voice/3g/4g - is what causes unnecessary wakelocks on stock rom/kernel - as I get virtually no, nada, zip, zilch, zero sleeping drain in airplane mode.
If your battery drains 1%+ an hour just sleeping, it can add up significantly. Even when things are turned off, they still sometimes cause wakelocks. Take NFC for example, I just read in a forum post that it was causing wakelocks even when turned off.
Question
Do you guys think since in AMOLED displays the black color is essentially the pixels being turned off, having a black wallpaper uses less battery? because each time I check my battery usage I see that my display is always on top, and I have this theory can anyone confirm it or correct me if I'm wrong?
Hello there,
I found a solution to the wake up lag, I tried everything before but nothing did the work. Its an app called wakelock, so far so good, batter drain is not that big, about 8% in 8 hours idle, I can live with that. I'm worried if there's a side effect to this? being the cpu constantly on, will this shorten its lifetime? Thanks.
Going from the name of the app and a quick peek, what it does is use a wakelock(!) to prevent the phone going to deep sleep. My guess is it will shorten battery life by around 20%, but I can't see how it should do any damage to the cpu.
Sent from my GT-N7100 using Tapatalk 2
It's not an amazing solution tbh, as it's keeping your CPU awake all the time. If the CPU doesn't enter deep sleep, there is no wake-up lag.
I don't imagine you'd immediately notice any major issues with it, but longer term nobody can really say - I don't think you will have a problem in a normal period of usage of the CPU such as a year or two. But at the end of the day, any time you change things like this, there's a risk, regardless of how small.
I need help with the kernel auditor to get better battery life, i have installed last cm nighties nad last NJ2 band, i read that if u change the kernel you can get better battery stats, the battery drop really fast, with low brightness and wi-fi off, just LTE data, without GPS. I use the app called "Root Booster" and the Calibrate Battery but it's the same. I need help with the kernels.
Sorry for the bad english, is not my native lenguage
B
My goto settings on this phone were interactive governor with the following tunables tweaked:
hispeed_freq = 918000
min_sample_time = 50000
timer_rate = 30000
Row I/O scheduler with 1024 kb read ahead.
Good battery life and not awful performance.
However, tweaking the kernel is unlikely to get you a miraculous change in battery life. Chances are if you're battery is draining super fast you have some rogue app or process keeping your phone from getting into deep sleep. You can troubleshoot that with better battery stats.
jason2678 said:
My goto settings on this phone were interactive governor with the following tunables tweaked:
hispeed_freq = 918000
min_sample_time = 50000
timer_rate = 30000
Row I/O scheduler with 1024 kb read ahead.
Good battery life and not awful performance.
However, tweaking the kernel is unlikely to get you a miraculous change in battery life. Chances are if you're battery is draining super fast you have some rogue app or process keeping your phone from getting into deep sleep. You can troubleshoot that with better battery stats.
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Click to collapse
Explain me more about "gettin into deep sleep"
Your phone's CPUs will scale up and down under load, but they will always run at some minimum frequency even under low load if they are "awake". I think it was around 300 MHz minimum on the i747.
In deep sleep the CPU powers off entirely, and your phone goes into a very low power draw mode. It is still listening for calls, texts, etc., but drawing much less power than if it was awake.
Your phone should be trying to get into deep sleep any time the screen is off, but wakelocks can prevent it. Not all wakelocks are bad. You don't want your phone switching into deep sleep if you're playing music or downloading files with the screen off; however, some wakelocks are unnecessary. Low priority apps syncing excessively or some app or process going rogue and holding a wakelock when it serves no purpose are not entirely uncommon. The kernel holds wakelocks and therefore sometimes catches the blame, but rarely is the kernel actually the culprit for excessive wakelocks. The kernel is typically just doing what the higher level software like the android system or apps are telling it to do.
One good indication the i747 was suffering from wakelocks was if it felt warm to the touch even after sitting with the screen off for an hour or two. This phone always heated some during use, but it should be room temp / cool to the touch after a long time idle. Since lollipop I don't find android's battery menu in settings to be all that useful. The better battery stats app I linked to in the post above is a great tool for investigating wakelocks. It will let you know what % of the time your phone is in deep sleep, and what is keeping it awake; a much more analytical approach than the "is it warm when it should be cool" method.
jason2678 said:
Your phone's CPUs will scale up and down under load, but they will always run at some minimum frequency even under low load if they are "awake". I think it was around 300 MHz minimum on the i747.
In deep sleep the CPU powers off entirely, and your phone goes into a very low power draw mode. It is still listening for calls, texts, etc., but drawing much less power than if it was awake.
Your phone should be trying to get into deep sleep any time the screen is off, but wakelocks can prevent it. Not all wakelocks are bad. You don't want your phone switching into deep sleep if you're playing music or downloading files with the screen off; however, some wakelocks are unnecessary. Low priority apps syncing excessively or some app or process going rogue and holding a wakelock when it serves no purpose are not entirely uncommon. The kernel holds wakelocks and therefore sometimes catches the blame, but rarely is the kernel actually the culprit for excessive wakelocks. The kernel is typically just doing what the higher level software like the android system or apps are telling it to do.
One good indication the i747 was suffering from wakelocks was if it felt warm to the touch even after sitting with the screen off for an hour or two. This phone always heated some during use, but it should be room temp / cool to the touch after a long time idle. Since lollipop I don't find android's battery menu in settings to be all that useful. The better battery stats app I linked to in the post above is a great tool for investigating wakelocks. It will let you know what % of the time your phone is in deep sleep, and what is keeping it awake; a much more analytical approach than the "is it warm when it should be cool" method.
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Click to collapse
Perfect answer, that give me a lot of info i dont know about it, thanks a lot dude i will use the app and check what is the problem here!
Do you guys leave always on display on? Should i leave it off the save battery?
I turned mine off. Kinda pointless IMO.
I don't think it is a substantial hit. It turns off when in a pocket.
Sent from my SM-N930T using Tapatalk
Only you can decide what amount of screen on time you want and what gets sacrifices to get there. I'm easily getting through the day without turning it off and I like having the information. If you like it and you're getting the battery life you want by all means leave it running. Shiny new toys would just be new toys without the shiny.
I have it on from 6am to 10pm then off while I sleep. I find it useful at times during the day.
Sent from my SM-N930P using Tapatalk
I have it on, not a great batt drain, it loolks awesome, thknk about this, You want a great device, full of functions, real unique charateristics, , so? why all rhe compñaints about battery life? if so concened boit batt life, go get a chimese unbranded set
I turned mine off the day I got it. Reason for that since it uses AMOLED screen which means over time you'll get burn in (actually it's really burn out) which can't be fixed. From what I understand it moves slightly to prevent that. Still why chance it?
I have mine on all the time, but honestly I find it can be distracting often. I have gotten to the point of NOT wanting my phone to be bothering me 24/7, and have found actually turning it off for days at a time is a good thing. But that's kind of a different point... fact is, the AOD is something that attracts the eye and attention, and I find myself turning my phone face down or away from me so that I am not constantly looking at the AOD. Not the phone's or AOD fault, just how this works. It is nice to have the option of AOD and I don't think it effects the battery life much.
Mine is only off at night because I like to sleep in the dark. All day long it's super handy to be able to glance down at the phone to see the time and other info, plus it looks cool.
I keep it on 24/7. The battery consumption is too minimal for me to loose the information it provides if I were to disable it. As long as my device can last two days on a single charge I'm happy.
under what I would class reasonable use I'm getting from 6am till midnight and still having 40%+ of battery so can't really complain as it's not running the battery down enough to the point where I would want to save battery.
Love this feature and never turn it off. Makes a great night clock.
Sent from my iPhone 6
I found it too bright for me.
ChodaBoyUSA said:
I found it too bright for me.
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Cant you control the brightness?
Battery consumption is definitely minimal. Two great things I learned from this thread: you can change the color, and you can set on/off times. Sweet.
Scott said:
Cant you control the brightness?
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Sadly i can't see an option to. I would love the ability to turn it down a bit as well
It can auto-off AOD when in the pocket or facing down.
How many of you are using the ambient display and how much battery does it drain in average?
I had it turned on from day one, but want to use it for the cool now listening songs feature while screen is off
EnIXmA said:
How many of you are using the ambient display and how much battery does it drain in average?
I had it turned on from day one, but want to use it for the cool now listening songs feature while screen is off
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I can't tell you how much exactly but it is a noticeable amount.
Sent from my Pixel 2 XL using XDA Labs
I Use ambient display, but don't really notice my battery taking a hit...
If you keep it in you pocket or face down (proximity sensor turns off the display on said conditions) when you're not using your phone the battery drain isn't noticeable
EnIXmA said:
How many of you are using the ambient display and how much battery does it drain in average?
I had it turned on from day one, but want to use it for the cool now listening songs feature while screen is off
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Click to collapse
why not just try it and see how much it affects you?
I notice no drain from it at all, doesnt mean you will or wont however.
Been using it since day one and I'm fine with whatever minimal drain it does.
Sent from my Pixel 2 XL using Tapatalk
It would have to use some amount not matter what. People that state they don't notice a difference etc is not possible. So there is no doubt about it. It will definitely get a hit. I suggest you try it for a day or two and see how you go
It is both.
In few cases it affect battery life.
In few cases it saves battery life.
My usage of phone ambience more than 90% of time is same so I manually set brightness. Enabling adaptiveness affected battery life.
However for others whose ambience changes from low brightness to high brightness, enabling it may save battery. Auto setting feature of phone do consume battery but battery saving provided by auto setting can be less or more depending on usage.
Sent from my Pixel 2 XL using Tapatalk
Hi
It all depends on your usage. If you regularly use your phone during the day, so need to charge your phone every day, than the percentage of power used by Ambient display is low compared to the phone usage, so it wouldn't seem to impact much on the battery. If however you are a light user of the phone (for example I can go 3 to 5 days sometimes without needing to charge my XL), then having Ambient display turned on would probably half or more your standby time.
This is why some people will see extra power drain, others it goes un-noticed.
Regards
Phil
EnIXmA said:
How many of you are using the ambient display and how much battery does it drain in average?
I had it turned on from day one, but want to use it for the cool now listening songs feature while screen is off
Click to expand...
Click to collapse
actually I had measure battery drain between ambient display ON or OFF (I let double tap and life to check phone ON).
based on my actual results, ambient ON takes 47 mAh and ambient OFF takes 9.1 mAh. To put simply, ambient ON drain 1.5%/hour while ambient OFF drain 0.3%/hour. In summary, putting ON ambient display will takes 1.2%/hour.
*sorry for my bad english
yuyakuchiki said:
actually I had measure battery drain between ambient display ON or OFF (I let double tap and life to check phone ON).
based on my actual results, ambient ON takes 47 mAh and ambient OFF takes 9.1 mAh. To put simply, ambient ON drain 1.5%/hour while ambient OFF drain 0.3%/hour. In summary, putting ON ambient display will takes 1.2%/hour.
*sorry for my bad english
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may i ask how many measure (and the duration of the measurement) did you take ?
Husky34 said:
may i ask how many measure (and the duration of the measurement) did you take ?
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When ambient is ON I measure for 6 hours, and while OFF only about 2 hours.
I'm using AccuBattery to get the numbers
yuyakuchiki said:
actually I had measure battery drain between ambient display ON or OFF (I let double tap and life to check phone ON).
based on my actual results, ambient ON takes 47 mAh and ambient OFF takes 9.1 mAh. To put simply, ambient ON drain 1.5%/hour while ambient OFF drain 0.3%/hour. In summary, putting ON ambient display will takes 1.2%/hour.
*sorry for my bad english
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Click to collapse
Very useful information, bro, thank you so much for doing the test I was planning to do XD
By the way:
Never apologize for your "bad english". You're not speaking your native language, you're not writing an resumee or applying for a job, you're on a internet forum about technology bringing useful information to people. The objective of language is to complete communication, you're not obligated to be fluent or to be perfect on a language that is not your own.