Kernel/DCDC issue? - General Questions and Answers

Posted this over on the timurs kernel Reddit but he wanted to get all defensive about it and deleted it cause his kernel is perfection in his own opinion. So I'm copying it and pasting it here. Just want any info on it I can get.
When I first setup my nexus I originally used my cigarette lighter worked fine then I converted to a dcdc converter and set it up for 5v when I hooked the nexus up there was a pop and a burning smell but every thing worked fine. Other than I noticed a horrible battery drain issue. After a few months I discovered anything I plugged in was draining the battery even if the tablet was off. The led on the phone charger would even light up even if it wasn't plugged into the wall. Got another nexus and everything worked flawless for months with the same DCDC and timurs kernel. Plugged it in took it out multiple times with no problem. Yesterday I decided I wanted to give marshmallow a test. It worked fine to other than it wouldn't charge due to the OTG cable and the way the stock kernel works so i flashed Element Kernel and enabled OTG charging and fast charge. It came on it charged and everything except music was playing through the tablet and not the DAC so I unplugged it and plugged it back in. It wouldn't charge..... Then I realized the charger had welded itself into the port and wouldn't come out. Finally got it out and tried it again. This time the tablet went black and won't do anything the port is melted on the tablet and the cord has melted plastic in the end. Is it a DCDC converter issue? Or a kernel issue? Maybe fast charge related? Just asking cause of the problem I had at the very beginning. Do you think the LCD might have survived? If so I was going to buy another nexus with a bad screen for like $25. Any input would be greatly appreciated just too keep it from happening again. Thanks in advance.

Fast charging burned cable? Ampere value?
You should put 'fast charging' in the title.
I used Timurs kernel on a 2012 Nexus 7 and the batterie was getting so hot, I had to disable fast charging. Since I used a Y usb cable to charge the tablet and only one usb device (usb ethernet adapter) there was no problem.
Maybe you should use an dc adapter with less Ampere output? Normal Charging is 0.5 Ampere but fast charging was up to 1.5 Ampere for me (checked with one of the cheap 'USB Charger Doctor Voltage Current Meter Mobile Battery Tester'). Maybe 1.0 Ampere is enough? Or use a thicker usb cable?
I think the LCD is fine because the overpower destroyed the mainboard only. But look inside the Nexus and see yourself!

Related

[Q] Charging Too Slow Now

I have had my Verizon Galaxy S4 since February of this year. I've been using the stock Samsung AC charger that came with it. It's always charged the phone pretty fast if I wasn't using the phone. It would charge about 15% in 20 minutes. Now it's only charging about 3 or 4% in 20 or 30 minutes. Now I didn't do anything different to my phone. I've been on this same ROM for over a month and this is just now a problem in the last week. My wife has the exact phone and charger that I have and when I use her charger it charges just as rapidly as mine used to, so I know it's not the usb port on my phone itself. I haven't dropped or damaged my charger at all in any way either.
Does anyone have any ideas about why this is happening?
If it charges fast on you wife's charger you've pretty much answered your own question.
Try using her cable with your charger, if it still charges slow then get a new charger.
gadget! said:
If it charges fast on you wife's charger you've pretty much answered your own question.
Try using her cable with your charger, if it still charges slow then get a new charger.
Click to expand...
Click to collapse
Ok, I'll give that a shot. Thanks.
I had the same problem too ! Did a full battery reset and everything is going good now !
You have to charge it for 12 hours and drain your battery until your phone don't boot. Charge it and here you are !
Yeah these devices act funky every blue moon. My wifes didn't even recognize ANY oem charger for a week. Only detected others as USB devices causing slow charge rate. Removing dust, component cleaner, fresh install, all did no good. Eventually it just resolved the issue itself. All chargers work normally again.
change the usb cables
I also had the same problem before. I'd been using the original charger and usb cable and noticed that charging takes a lot of time than normal.
I found that it's on the usb cable. I accidentally found it when I used gsam battery monitor. It displays the current being received by your phone when charging. Using the original usb cable, it only gets around 600mah. I tried another usb cable (from a previous Samsung device) and now my phone gets 1,900mah (closed to the charger output of 2,000 mah).
Every since I changed the usb cable, my charging is fast now. Hope this helps.
I would try a new cable and Charger that is rated 2.1 amps or better if will be charged real quick
elchingon said:
I would try a new cable and Charger that is rated 2.1 amps or better if will be charged real quick
Click to expand...
Click to collapse
I noticed that using the Pure Nexus rom my charging time became significantly faster. In fact I can get a full charge from nearly dead in just over an hour. This is using the charger and cable that came with the phone.
I had the same problem too ! Did a full battery reset and everything is going good now !
MT tenso
How do you make full battery reset?
The charging rate is based on the output rating of the charger, which is determined by the resistance value between the Data+ and Data- USB pins. If you use a cheap cable with high(er) internal cabling resistance, that will throw off the detected charger output capacity rating, and knock you down to a lower charging current and longer charging time.
Also, one time, even with the original charger and original cable, I couldn't charge at anything more than the default USB 500mA. I ended up having to power off the phone, and power it on again, which fixed the charging current and speed problem.
Install this app & check if it is getting charged at max current; anything less than 1200 mA when screen on & 1900 mA when screen off, you need to change your cable or charger
https://play.google.com/store/apps/details?id=com.abmantis.galaxychargingcurrent.free
Sent from my GT-I9500 using Tapatalk
I read somewhere that if you activate airplane mode the battery is charging faster.

Fast charging stopped working

My S6 is 2 weeks old today and I noticed that fast charging (using adaptive charger I got in the box) has stopped working
Yesterday at work I put my phone on charge and went back to it after 20mins and noticed it had stopped charging.
I thought maybe it the 2pin plug point so I changed plug points and it starts charging.
Come back later and it stopped charging.
Changed plug point again and the same thing happened.
Getting irritated I put it on my wireless charge mat instead.
Today I decided to test the charger and low and behold it's now working but it's charging at the normal rate.
I tested this by using my old S4 charger and I got the same time to full message.
Before when I plugged in my adaptive charger it said fast charging now it just says "Cable charging"
Do you guys think it's my phone or my adaptive charger?
I don't have another adaptive fast charger to test with
EDIT: I was running XtreStoLite ROM, I used ODin and reloaded the latest AOD8 Vodafone SA firmware but still fast charging isn't working.
I'd say it's the charger. There have been instances of them shorting. The last Note 4 I had did the same thing.
Perhaps a silly question, but am I right in thinking that the fast charging only works when the battery is below 20% or so? I tried plugging mine in yesterday when at 40% charge and it just said 'cable charging' (using the out-the-box charger and cable)
alanjrobertson said:
Perhaps a silly question, but am I right in thinking that the fast charging only works when the battery is below 20% or so? I tried plugging mine in yesterday when at 40% charge and it just said 'cable charging' (using the out-the-box charger and cable)
Click to expand...
Click to collapse
When you use the fast charger, it'll say fast charging no matter how full your battery is.
Gboss01 said:
My S6 is 2 weeks old today and I noticed that fast charging (using adaptive charger I got in the box) has stopped working
Yesterday at work I put my phone on charge and went back to it after 20mins and noticed it had stopped charging.
I thought maybe it the 2pin plug point so I changed plug points and it starts charging.
Come back later and it stopped charging.
Changed plug point again and the same thing happened.
Getting irritated I put it on my wireless charge mat instead.
Today I decided to test the charger and low and behold it's now working but it's charging at the normal rate.
I tested this by using my old S4 charger and I got the same time to full message.
Before when I plugged in my adaptive charger it said fast charging now it just says "Cable charging"
Do you guys think it's my phone or my adaptive charger?
I don't have another adaptive fast charger to test with
EDIT: I was running XtreStoLite ROM, I used ODin and reloaded the latest AOD8 Vodafone SA firmware but still fast charging isn't working.
Click to expand...
Click to collapse
Geez boet, how much does an S6 go for in SA?
I am having the same problem with my S6.
The fast charge doesn't work afree a week.
Last night I plugged in @ midnight with the original charger and cable at 5% and all apps shut down
It said "charging" and not "fast charging".
530am....only 97%.
This is pretty frustrating. It seems to have stopped in the last couple days.
Thoughts?
If you connect the USB cable to your PC and it detects your phone, it's proof that it's the adaptive charger. It happened to me on my Note 4, and I had it replaced with the warranty. Problem solved. Try it and you won't have any more problems. Garanteed!
Japultra said:
When you use the fast charger, it'll say fast charging no matter how full your battery is.
Click to expand...
Click to collapse
Thanks - have now realised that I had to push the USB cable extra hard into the charger - that switched it from showing 'charging' to 'fast charging'
luckyluis said:
If you connect the USB cable to your PC and it detects your phone, it's proof that it's the adaptive charger. It happened to me on my Note 4, and I had it replaced with the warranty. Problem solved. Try it and you won't have any more problems. Garanteed!
Click to expand...
Click to collapse
Oddly...when I connect it to my computer...it charges (slowly of course).
But the computer never detects it.
Update
@Biggenz the S6 32gig is around the R9000 mark
@BoondckSaint try another Adaptive Fast Charger, apparently even the Qualcomm ones work too. If it still doesn't fast charge take it into SCC.
@alanjrobertson my problem started out like that, I'd have to unplug and re-plug the cable in then it would work. Now more often than not it just doesn't Fast Charge
So, I took my phone in to Samsung Customer Care and after trying numerous chargers my S6 would just say "Cable Charging" and never show "Fast Charger Connected" in the notification bar.
They tested my charger on another S6 and S6 Edge and they both worked fine and Fast charge was working. Had the correct "Fast Charger Connected" in the notification bar too.
I had to leave my S6 there and they will repair it. The technician said it's either the USB connector is faulty or the mainboard needs replacing.
I'm abit disappointed now as my s6 is only 2 weeks old and it's already had to be booked in for repairs.
Hopefully no such issues for me - it seemed to be very much linked to the USB plug at the charger end not being the whole way in but will be keeping a close eye on it!
alanjrobertson said:
Hopefully no such issues for me - it seemed to be very much linked to the USB plug at the charger end not being the whole way in but will be keeping a close eye on it!
Click to expand...
Click to collapse
I hope its just the USB plug m8. I'm suffering without my S6
Gboss01 said:
My S6 is 2 weeks old today and I noticed that fast charging (using adaptive charger I got in the box) has stopped working
Yesterday at work I put my phone on charge and went back to it after 20mins and noticed it had stopped charging.
I thought maybe it the 2pin plug point so I changed plug points and it starts charging.
Come back later and it stopped charging.
Changed plug point again and the same thing happened.
Getting irritated I put it on my wireless charge mat instead.
Today I decided to test the charger and low and behold it's now working but it's charging at the normal rate.
I tested this by using my old S4 charger and I got the same time to full message.
Before when I plugged in my adaptive charger it said fast charging now it just says "Cable charging"
Do you guys think it's my phone or my adaptive charger?
I don't have another adaptive fast charger to test with
EDIT: I was running XtreStoLite ROM, I used ODin and reloaded the latest AOD8 Vodafone SA firmware but still fast charging isn't working.
Click to expand...
Click to collapse
Have you tried depleting battery all the way down until S6 goes off by it self? Then charge it while is off all the way to 100% or leave it all night. Then see difference. Also one hint which is not quite related to your problem,but just for people to know. Fast Charging is NOT working from 50% and up to 100%. This is normal. So Fast Charge works from 0%-50%,NOT ABOVE!
stefan063 said:
Have you tried depleting battery all the way down until S6 goes off by it self? Then charge it while is off all the way to 100% or leave it all night. Then see difference. Also one hint which is not quite related to your problem,but just for people to know. Fast Charging is NOT working from 50% and up to 100%. This is normal. So Fast Charge works from 0%-50%,NOT ABOVE!
Click to expand...
Click to collapse
The Samsung Care Center replaced the USB port on my phone and its fast charging again perfectly. Wasn't anything to do with the battery thankfully.
Before replacing the USB port the phone always showed "Cable charging" whenever it was plugged into the fast charger.
Now it shows Fast Charging in the notification area.
I am also having the same problem with mine it can be seen in odin but no mtp no matter which computer i use ... (yes drivers were correctly installed) also not showing fast charging with stock charger and about 4 different cables that i know work with it in the past. My phones been flashed will this void my warranty for usb repair ?
xionation said:
I am also having the same problem with mine it can be seen in odin but no mtp no matter which computer i use ... (yes drivers were correctly installed) also not showing fast charging with stock charger and about 4 different cables that i know work with it in the past. My phones been flashed will this void my warranty for usb repair ?
Click to expand...
Click to collapse
I took mine in and they fixed it. This was at the Samsung centre in my city. Took them a week because they didnt have any USB ports at their branch and had to wait for it to be couriered from Johannesburg
I'm having the exact same issue with my S6. Only a couple of months old and only showing Cable charging and intermitantly stops charging. I'd say definitely charging port. I've tried the samsung fast charger, the sony z4 tablet fast charger, my aukey quick charge 2.0 car charger and my aukey portable quick charge 2.0 portable battery. Bit annoyed
Same issue here. comp does detect it then it drops over and over. same with whatever charger im using or cord. 2 months old 920W8.
i see one of these in my future.........................
http://www.ebay.com/itm/Samsung-Gal...Port-Flex-Cable-Mic-Flex-Repair-/231521417652
Yes. same like mine. Just push the cable extra hard into the charger. it works! thanks!
mine ose as you say but their was an inbetween stage off it booting in to the vertual reality app seriously anoyying but then just wouldn charge then started fast charging for a day then again to vtgear what ever its called then stopped charging completely n then would only charge at cable charge rate ( 4 hours till charged ) its currently at samsung repair center im waiting aan email

USB port damaged?

I have looked around on this topic before posting, but nothing applies to what im experiencing
Up until this morning, I haven't had a single issue with my USB port or charging in general.
I clean flashed Purity KitKat, flashed compatible Uber kernel and installed my apps as one usually do, and let the phone charge for a while. A few hours later, I realized my battery was at 0%. I started panicking, looking for a USB replacement part, which I found for about $12 on Amazon. I decided I would download GSAM battery monitor to see if there was an issue with my charging cable.
What I saw was the mA flow was acting erratic, sometimes shooting from -700ma (yes, that's negative 700) all the way up to 1800mA. Even by just rotating the screen, it would drop instantly. . The phone charges, but a little at a time. I disabled KSM and fast charge which seemed to have a positive effect.
I'm not sure what caused this, or how to fix it, but I've attached a couple pictures to give you an idea of what I'm seeing. If it is in fact the USB port, would using a Qi charger be a good option or should I just go ahead and dismantle the phone and replace the USB port?
Note: windows still recognizes the phone and I can send files from the computer, and the charging bolt is showing.
Have you replaced the cable? Far more common for the cable to crap out then the port. Cheap or broken cables will appear to work, computer will detect phone and even display a charging indicator but it won't actually charge. Had happened to me in the past.
galakanokis said:
Have you replaced the cable? Far more common for the cable to crap out then the port. Cheap or broken cables will appear to work, computer will detect phone and even display a charging indicator but it won't actually charge. Had happened to me in the past.
Click to expand...
Click to collapse
Yeah I've tried numerous chargers including my car charger. They all charge, but it took 12 hrs from 0 to 100
Kroniq said:
Yeah I've tried numerous chargers including my car charger. They all charge, but it took 12 hrs from 0 to 100
Click to expand...
Click to collapse
Try flashing the stock rom to rule that variable out. If you want to be sure that is the usb port you could try with a wireless charger as it could also be the battery, you can find a new one at the same price range of the port.
It does seems a lot like what happened when both the stock charger and the cable were damaged. I tried to charge the phone and when disconnected it had less charge.

Fast charging issues

Its been over a month that ive had my 64g note 5. Just yesterday ive noticed that my so called fast charger wasnt charging my phone as it did in the earlier weeks of usage. No i havent exposed my phone ro any liquids and my charger port is covered by my phone case flaps. And no i havent altered my original oem charger cradle/ usb cord. Any one else experiencing the same problem?
Try plugging the charger directly into the wall outlet (If it wasn't already). If you have any alternate USB cables, try some of those. Otherwise it's the adapter or the phone.
Typically unless you notice the actual port having problems the USB cable is probably worn out. They are usually cheap and frequent bending on any portion of the cable will cause it to eventually break the wire inside.
This is one of the benefits of wireless charging. You won't have to worry about wear on the port or dealing with broken/worn USB cables.
Edit: What I did notice about a week ago was my Fast wired charger was cutting in/out or the phone would say it was only charging at standard speed. I had the adapter attached to an extension cord and decided to just run it directly to my power strip, which solved my problem.
An extension cord won't matter. The charger dongle either gets juice or doesn't...
I bought the Choetech fast wireless charger, working great. Heard there's been issues regarding Samsung brand. But the wireless charging works very well. I have the Choetech fast charger & a Spigen wireless dock, both flawless not cutouts!
Sent from my Note 5
For me the issue seems to be the lock screen. When on the lock screen and I plug the charger in I usually do not get fast charge. But if I first log on then it usually will fast charge.
Sent from my SM-N920V using Tapatalk
KruseLudsMobile said:
An extension cord won't matter. The charger dongle either gets juice or doesn't...
Click to expand...
Click to collapse
Juice directly from an outlet will always be more than juice coming from an extension cord (especially if its a cheap one) connected to a powerstrip connected to an outlet. If you have ever cut open an extension cord, you'd see why. Below all that plastic are a few silky copper threads which can in no way possible convey the amount of electricity that the thick wires behind your outlet can.
Sent from my SM-N920V using Tapatalk
Yes but the dongle is vastly reducing what goes to the phone anyway
_whitebeans said:
Its been over a month that ive had my 64g note 5. Just yesterday ive noticed that my so called fast charger wasnt charging my phone as it did in the earlier weeks of usage. No i havent exposed my phone ro any liquids and my charger port is covered by my phone case flaps. And no i havent altered my original oem charger cradle/ usb cord. Any one else experiencing the same problem?
Click to expand...
Click to collapse
Issues with the stock chargers for a lot of people on the note 5. Mine wouldn't fast charge unless plugged and unplugged a bunch. Not good for the port. Got a verizon red tip rapid charger like a few other coworkers got and it fast charges everytime I plug it in. No matter extension or not.. Or 20% or 90%. [emoji4]
Verizon Wireless Technician using Tapatalk on Note 5

Slowest Battery Charging

Alright, so here is a fun issue to deal with. My notepro has always been a little slow to charge, but most of them are. However, its gotten very bad.
I have had issues with screen flicker and a little heat issues and some other small things off an on. So, fed up with it, a few days ago I rooted the tablet. It worked fine. Then I tried to install a new kernel and rom that was getting good reviews. However, when i did this, I couldnt get past the boot screen. Several reinstalls of stock and customer kernels later, my tablet started flashing and eventually died. When it was plugged in, it would show the battery icon with a circle in the middle but then die. Several tries to fix only seemed to solidify the tablet's fate.
However, yesterday I gave it another shot. I assumes the tablet had heated up and made the solder loose, so after a while it was solid again. It started charging, and after reinstalling stock rooted rom and stock kernel repeatedly, it was working again. I then installed the rom and kernel I was trying to before (I had to have a custome kernel to be able to control voltage for the screen flickering issue).
Now it is actually working. All functions are working, and oddly enough I am not seeing any screen flickering.
Only one real problem remains. Battery charging. The battery is charging so slowly that when the tablet is turned on, it doesnt charge at all, it creates a stalemate between charging and draining. It also drains pretty quick. The power drops about 5% in about 5-10 minutes of full screen brightness use (I was testing it this way to try and see if it would flicker again.
Its been charging for about an hour now, and only gone up 5%.
I have tried a couple cords and different bricks, but to no avail.
There are some thoughts, I am wondering if the tablet is only drawing power as if charging from usb, so only around 0.5a instead of 2.4a or so . I am also wondering if there is still a hardware issue.
I do not think it is the rom or the kernel, as this issue was happening as well after I got the tablet working again on stock but before I tried isntalling the rom/kernel again.
Any suggestions? I would be very appreciative.
I had simular problem with very slow charging, reboots and bluescreen. I opend my note to check battery plugg for broken soldering, but I found no problem with it. But to check turely i unplugged battery from main bord and replugged it again. After that I had no problem at all, now its charging normal, no reboots.. stil working perfect after averyday use for about 8 mounts......
If you are using usb cord not usb3 cord it will charge very little when using tablet . Mine will charge when off and below 25% to full in 7 or 8 hrs overnight.
Sent from my SPH-L300 using XDA Free mobile app
Could be a bad charging port dock/flex cable. These are actually pretty easy to replace and can be found on Amazon. I had to replace one on mine. Try searching for a usb charging port dock flex cable for samsung galaxy note pro. That will cause the issues you are seeing. However the screen flickering sounds like a voltage issue caused by a cracked solder pin from the battery connection to the board. Which is very common on these and hard to see without an electronics magnafication glass. You could try taking the back off and pressing the battery connection firmly while plugging in your tablet and powering it one to see what happens. Either way sounds like a hardware issue.
snifferno said:
I had simular problem with very slow charging, reboots and bluescreen. I opend my note to check battery plugg for broken soldering, but I found no problem with it. But to check turely i unplugged battery from main bord and replugged it again. After that I had no problem at all, now its charging normal, no reboots.. stil working perfect after averyday use for about 8 mounts......
Click to expand...
Click to collapse
Ok Guys, had the same problem with my 12.2 samsung tab pro, changed usb chargers, cables etc.
Found that the connector on the tablet itself (female) did not made good contack with the male usb.
So i simply , very careful, with a pair o pliers closed both tips on the usb conector, so the cable enters more tight. And voila, the usb amp meter i had showed a rate of charge from .33 amp , jumped to 1.73 witch is more than enough to charge and use tablet at the same time.
You need to do this at the end of the cable that plugs on the tablet, that is kind of double, maybe a e.0 usb or something like that. Make sure to close both tips. You want a tight connection

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