Database Info

Power-on on Plugged-in MTK device

We are trying to set up an Android 4.4.2 device to boot once it is plugged in to a power source. The device is a POSH Titan HD E500. (MTK6592)
We've come across different ways that each manufacturer handles the booting (see links at the end of this question). The one consistent trend is that people try to seat their code alongside the indicator that comes up to show you battery percentage during charging. It seems like a good way to proceed is to replace the contents of that battery indicator program with something like /system/bin/reboot.
My question is: does anyone know a good way to find which program is getting called when that battery indicator comes up on a new phone? The phone will be off at the time, but the device will also be rooted in case that helps.
Any advice would be tremendously appreciated!

[Completed] Galaxy S4 randomly restarting; Used catlog to record

I'm having an issue with my Galaxy S4 where it randomly restarts, often it happens when waking it up after a period of inactivity, or when connecting it to a charger. Last time the issue started occurring was after I took out the battery to temporarily put in another SIM. I factory reset the thing and I had no more issues... until I had to take the battery out put in another SIM. I have also replaced the battery so I am pretty sure it's not a battery fault. I don't see how replacing the SIM would even cause this issue.
The rebooting that it does is a bit different to a hard reboot since it does boot up a bit quicker, and when I check the battery usage instead of only displaying the battery levels since it's rebooted, ie less than a minute, it displays the levels even previous to the reboot, and where it was rebooting it shows a gap.
Anyway I used catlog to see what happens when it does reboot which I've uploaded to pastebin
(apparently I'm not allowed to post outside links ,add tVdCcRxQ to the end of the pastebin url to see the paste)
On line 4862 you can see a bunch of services start dying, and just before that on 4861 it says something about a boot animation restarting. I can't make sense of what is happening before it dies so I was hoping someone here could maybe spot something that would indicate why it's rebooting.

Hi there
You'd be best served asking for help from the experts who own your device, here
[HELP THREAD] Galaxy S4 | Ask any question | Noob friendly.
Good luck

[Completed] My phone NEVER goes into deep sleep (Samsung Galaxy S6)

Dear all,
I am writing this post to hopefully get some help or directions regarding my issue, because I have already spent hours and hours looking on the internet trying fixes on my phone without anything working for me so far.. So I am getting a bit hopeless....
I recently got a Samsung Galaxy S6 (SM-920I model), and since the beginning i have been shocked by how CRAPPY the battery life was. To give you some ideas, my phone loses around 3-5% of battery per hour when idling and screen off, meaning I am not doing anything at all with my phone. Overnight, I lose about 15-20% battery with my phone on airplane mode, power saving, or whatever else you want, when it is not doing anything at all..
I know that my problem is a deep sleep problem, quite easy to identify i guess, so I have spent a lot of time reading and trying to fix it by myself but so far nothing worked.
To give you some background, after unpacking the phone I quickly upgraded Android from 5.0 to 5.1.1, so I cannot tell how it was working at 5.0. It is only after that I saw that a lot of people have issues on 5.1, but it is strange because just before having my S6, I was having a OnePlus One on 5.1 and I didn't have such battery problems and everything worked fine except turning off the "keep awake" setting option for GooglePlayServices.
What I can say though, is that since I upgraded I never had so much difficulties trying to fix a problem on any Android phone than before. Basically, since day 1, my phone never went a single time into deep sleep mode.
So far, to fix this, I tried all the following:
- Reflash the stock firmware (Samsung 5.1.1) --> many times, with full Cache/davik wipe and factory resets
- Root my phone using UniKernel
- Install custom ROM (I am running XtreStoLite version 2.2) + all kinds of wipe/factory reset
- Flash different kernel that are shipped with the ROM (there are 5 different ones if I remember)
- Use my phone with only stock apps (to see if the problem comes from one of my apps)
- Cold reboots
- The "DeepSleepFix" using the Android terminal as described on some forums (cannot post the link for now since I'm new..)
- And desperately, try to use my phone normally for now
Overall, I would say that my battery would last roughly 15 -20h in total with normal usage, not even heavy, which quite sucks..
I can show the no deep sleep issue easily to you with some screenshots (will put a link to the screenshots here when I have 10 posts... for now I can't..) , I have tried many applications to try to find the root cause such as:
- WLD
- 3C CPU
- BetterBatteryStats
- GSAM
etc.
I am monitoring my phone closely for the past 1-2 weeks and so far I have never seen it being in deep sleep at all (ah yes... 0.2s in total max all the time..). Also, when I check on the default Battery menu of Android, after a full day I would usually see "Android OS" on top and using 20-30% of the battery at least.
The problem seems to boil down to a process called "LHD" in the kernel wakelock. This is keeping my phone awake 100% of the time, whether I am using the phone or if I am not. However, even with this info I tried to search online and I cannot find anything about "LHD", so I am really stuck right now.. Do anybody knows what it is and why it is a problem for me?
If any of you have a solution or can give me some guidelines to help me fix this issue, I would really appreciate any help. If you need more information from me also let me know.
Thank you for taking the time to read me,
Best regards.

ImPain said:
Dear all,
I am writing this post to hopefully get some help or directions regarding my issue, because I have already spent hours and hours looking on the internet trying fixes on my phone without anything working for me so far.. So I am getting a bit hopeless....
I recently got a Samsung Galaxy S6 (SM-920I model), and since the beginning i have been shocked by how CRAPPY the battery life was. To give you some ideas, my phone loses around 3-5% of battery per hour when idling and screen off, meaning I am not doing anything at all with my phone. Overnight, I lose about 15-20% battery with my phone on airplane mode, power saving, or whatever else you want, when it is not doing anything at all..
I know that my problem is a deep sleep problem, quite easy to identify i guess, so I have spent a lot of time reading and trying to fix it by myself but so far nothing worked.
To give you some background, after unpacking the phone I quickly upgraded Android from 5.0 to 5.1.1, so I cannot tell how it was working at 5.0. It is only after that I saw that a lot of people have issues on 5.1, but it is strange because just before having my S6, I was having a OnePlus One on 5.1 and I didn't have such battery problems and everything worked fine except turning off the "keep awake" setting option for GooglePlayServices.
What I can say though, is that since I upgraded I never had so much difficulties trying to fix a problem on any Android phone than before. Basically, since day 1, my phone never went a single time into deep sleep mode.
So far, to fix this, I tried all the following:
- Reflash the stock firmware (Samsung 5.1.1) --> many times, with full Cache/davik wipe and factory resets
- Root my phone using UniKernel
- Install custom ROM (I am running XtreStoLite version 2.2) + all kinds of wipe/factory reset
- Flash different kernel that are shipped with the ROM (there are 5 different ones if I remember)
- Use my phone with only stock apps (to see if the problem comes from one of my apps)
- Cold reboots
- The "DeepSleepFix" using the Android terminal as described on some forums (cannot post the link for now since I'm new..)
- And desperately, try to use my phone normally for now
Overall, I would say that my battery would last roughly 15 -20h in total with normal usage, not even heavy, which quite sucks..
I can show the no deep sleep issue easily to you with some screenshots (will put a link to the screenshots here when I have 10 posts... for now I can't..) , I have tried many applications to try to find the root cause such as:
- WLD
- 3C CPU
- BetterBatteryStats
- GSAM
etc.
I am monitoring my phone closely for the past 1-2 weeks and so far I have never seen it being in deep sleep at all (ah yes... 0.2s in total max all the time..). Also, when I check on the default Battery menu of Android, after a full day I would usually see "Android OS" on top and using 20-30% of the battery at least.
The problem seems to boil down to a process called "LHD" in the kernel wakelock. This is keeping my phone awake 100% of the time, whether I am using the phone or if I am not. However, even with this info I tried to search online and I cannot find anything about "LHD", so I am really stuck right now.. Do anybody knows what it is and why it is a problem for me?
If any of you have a solution or can give me some guidelines to help me fix this issue, I would really appreciate any help. If you need more information from me also let me know.
Thank you for taking the time to read me,
Best regards.
Click to expand...
Click to collapse
Hello and thank you for using XDA Assist.
Sorry to hear about your trouble but we cannot provide technical support nor can other members reply to your posts here on XDA Assist. Fortunately there is an XDA area dedicated to the Samsung Galaxy S6 at http://forum.xda-developers.com/galaxy-s6 which would be a good starting place. I suggest you post your question with all relevant details in the friendly Q&A forum there at http://forum.xda-developers.com/galaxy-s6/help where the experts familiar with your device will be best able to guide you.
Good luck!
This thread is closed.

Mobile devices, charge management settings

Hi there,
I am a newbie and I have read on different web sites that one have to take care of the mobile device battery to avoid hasty weakening.
For example search on your browser “mobile device battery charging best practices”.
I have some technical hardware questions:
- In the electronic charging module, is there a control to switch ON/OFF by software the power to charge the battery.
- If YES, what is the leakage current when OFF, relatively to the nominal charging current and the device consumption?
- Is it possible to control the charge current by software?
- As the devices have in stock its own battery voltage detection, is the values readable by software. I mean can the developers use them in the ROM?
- To sum up, why there is no charging management in the setting of the custom ROMs? I mean set the current and time by settings in the ROM.
Thank you to share your knowledge.

MrNice said:
Hi there,
I am a newbie and I have read on different web sites that one have to take care of the mobile device battery to avoid hasty weakening.
For example search on your browser “mobile device battery charging best practices”.
I have some technical hardware questions:
- In the electronic charging module, is there a control to switch ON/OFF by software the power to charge the battery.
- If YES, what is the leakage current when OFF, relatively to the nominal charging current and the device consumption?
- Is it possible to control the charge current by software?
- As the devices have in stock its own battery voltage detection, is the values readable by software. I mean can the developers use them in the ROM?
- To sum up, why there is no charging management in the setting of the custom ROMs? I mean set the current and time by settings in the ROM.
Thank you to share your knowledge.
Click to expand...
Click to collapse
Maybe my questions are too technical. So other questions:
1- In a good working device, when it beep or lights to ask charge, is the battery at 0% + a bit OR is the battery at 30% + a bit?
2- In a good working device, when it beep or lights to say "charged, please disconnect", is the battery at 100% OR is the battery at 80%?
3- Why should one to disconnect the device after charge? What is the cycle (in time or %) charge/discharge that will damage the battery?

Here a good post that give some info but doesn't answer my questions.

Question My battery drain is insane!

Hello everyone, I'm in trouble.
22 Ultra is simply eating battery at indescribable levels. Yesterday we went on a trip from work, I left my home with 100%. During the day I did not touch the phone, a bit of a camera but beyond that really nothing. My battery was about 40% after about 3 hours, with no screen use at all! On the other hand, a friend at work with Xiaomi came out with 100% and after 3 hours was on 85, and he did touch the phone here and there.
I don't know how that makes sense, and it's no longer clear to me what to do to solve the problem. I debloat, deleted and disabled a number of irrelevant apps but still, the battery is being eaten. How can I solve it? Please help me!

Draining battery so fast, 20% per hour while idle is not normal, so you definitely have a problem.
It looks that there are two possibilities here:
- Battery malfunction
- Some active process in the background that is using lots of processor power constantly.
If battery is damaged / not working properly, the only solution is to replace it. Still, this doesn't look like a case of duying battery.
If you have some persistent process running in the background that you can't get rid of by debloating, it can't be stopped by restarting the phone, and its not visible in the battery usage section, i would say that factory reset is the most effective option here, since you stated that you tried to deal with it in a various ways already.
You could also wait a bit until you get chance to update to OneUI 5 / Android 13, which should solve your problem, if it's software related.
Hope that you will find solution soon

draskome said:
Draining battery so fast, 20% per hour while idle is not normal, so you definitely have a problem.
It looks that there are two possibilities here:
- Battery malfunction
- Some active process in the background that is using lots of processor power constantly.
If battery is damaged / not working properly, the only solution is to replace it. Still, this doesn't look like a case of duying battery.
If you have some persistent process running in the background that you can't get rid of by debloating, it can't be stopped by restarting the phone, and its not visible in the battery usage section, i would say that factory reset is the most effective option here, since you stated that you tried to deal with it in a various ways already.
You could also wait a bit until you get chance to update to OneUI 5 / Android 13, which should solve your problem, if it's software related.
Hope that you will find solution soon
Click to expand...
Click to collapse
I want to keep the factory reset as the last option....
Every single app that I don't need at the background I disabled from running in background.

Deleted

maor23 said:
I want to keep the factory reset as the last option....
Every single app that I don't need at the background I disabled from running in background.
Click to expand...
Click to collapse
Try to wipe your system cache.....it won't do a factory reset but might solve the issue while keeping your phone as it is.
Volume UP button along with the power button until you see Android screen
Scroll down with volume down until you reach wipe system cache and reboot
sometimes, it won't show up while you press the buttons....in that case, connect your phone to your PC/Laptop with any USB C cable and then do it.
Second solution, you can try Samsungs App Booster.....get an apk from the net. It generally helps as well.