Develop Bugs

Problems with touch screen when screen is locked and phone is charging...

Since I thought my phone, I've noticed an annoying problem. When my phone is charging in the screen is locked, I go to unlock the phone and the touch screen seems to have a problem registering my touch for the pattern password.
I would unplug it for a second to draw the unlock pattern, unlock the phone, and then proceed about while the phone is plugged back in. Then out of nowhere, it'll do the same thing.
Anyone experiencing this?
Sent from my SGH-T989 using XDA App

m3trella97 said:
Since I thought my phone, I've noticed an annoying problem. When my phone is charging in the screen is locked, I go to unlock the phone and the touch screen seems to have a problem registering my touch for the pattern password.
I would unplug it for a second to draw the unlock pattern, unlock the phone, and then proceed about while the phone is plugged back in. Then out of nowhere, it'll do the same thing.
Anyone experiencing this?
Sent from my SGH-T989 using XDA App
Click to expand...
Click to collapse
There is another thread here somewhere that talks about the issues while being plugged in. I think this was one that was mentioned.
Sent from my SGH-T989 using xda premium

i am not getting that problem, but if you call tmobile im sure they will switch the phone.

I've had this problem - but only when I used a different charger from the one included (even though it's a Samsung charger). Are you using the cable included with the phone?

Yea it has happened on mine but only if it was laying down when i try to unlock it. once i pick it up it was fine
Sent from my SGH-T989 using XDA App

I can confirm this very issue on two GSII's I've used. It's annoying.
Sent from my SGH-T989 using XDA App

This is a known issue with all variants of the Galaxy S2.
The Galaxy S2 is very sensitive to input voltage, and if it doesn't like what it's getting, the touch screen calibration gets a little funky.
Voltage-regulated chargers (ones that are big and blocky or have a bulb on the wire) tend to work well.
Don't bother exchanging it over this, it won't change anything. You just need a better charger.

Yes, I'm using the same charger came with the phone. I guess we will just settle this issue with the fact that it just gets a little funky When plugged in.
Sent from my SGH-T989 using XDA App

Big thanks to everyone who responded to this thread, hopefully we can figure out what the problem is in the near future
Sent from my SGH-T989 using XDA App

manekineko said:
This is a known issue with all variants of the Galaxy S2.
The Galaxy S2 is very sensitive to input voltage, and if it doesn't like what it's getting, the touch screen calibration gets a little funky.
Voltage-regulated chargers (ones that are big and blocky or have a bulb on the wire) tend to work well.
Don't bother exchanging it over this, it won't change anything. You just need a better charger.
Click to expand...
Click to collapse
better charger yes
phone being sensitive not really
all Properly build chargers will not cause that problem
i purchase cheap 2A charger from Deal Extreme, but those are build good, not like some of the crappo accessories from ebay
BlackBerry chargers works good too

I have the same problem.
As many of you guys said, a good charger is needed for a stable voltage input.
I have no problems charging from the original charger and my desktop computer.
However the problem shows when I am using my laptop (7 year old) usb.
So a good charger is recommended.

I can confirm this issue, but what i want to know is, why does this happen when the phone is lying flat on a surface while charging and goes away the moment you pick it up? If it was a faulty or imprecise charger issue then the problem should persist?
My guess is it has to do with the EM shielding around the charging module, and that it doesnt do enough to shield the totally normal residual interference from interfering with the touch screen digitizer. When we pick it up, our hand acts as an interference dampener and minimizes the issue while it is charging, to almost negligible amounts. But its just a guess. The chargers might also be generating greater than average interference as well. But just charger alone cannot explain why pickibg up minimizes the problem.

The charger doesn't cause any erratic behavior on my Galaxy Nexus like it does on this phone... So what is the explanation behind that?
Sent from my SGH-T989 using xda premium

manekineko said:
This is a known issue with all variants of the Galaxy S2.
The Galaxy S2 is very sensitive to input voltage, and if it doesn't like what it's getting, the touch screen calibration gets a little funky.
Voltage-regulated chargers (ones that are big and blocky or have a bulb on the wire) tend to work well.
Don't bother exchanging it over this, it won't change anything. You just need a better charger.
Click to expand...
Click to collapse
Use the charger that came with the phone
Sent from my Hercules using XDA App

What's unfortunate is that the Samsung charger that came with the device causes the touchscreen issues.
Fortunately, I have an HTC charger lying around that works, no problems.

I have seen this happen with the HD2, Evo 4g, galaxy s4g & Sensation. Its a problem with chargers and the voltage. It happens with those chargers from walmart. Its not just the GS2 phones.
Sent from my SGH-T989 using XDA App

Add the Tmo HD7 to the list.... it happens all touchphones on which i believe has grounds surrounding the phone, touching the touch screen stabilizer or whatever you'd like to call it. It's the ground of the charger, nothing to do with charger instability. Take your laptop's charger, plug it into a wall with no 3rd ground (a laptop that has the 3rd prong) and take that same plug, and plug it into a plug with 3 prongs, you'll notice it has that static-like feeling that makes ur fingers tingle (when you touch a metal part of your laptop). It's the same issue with our phones
I hope this helps someone

Just change charger i have noticed that since i work in a cellphone company .... but i change to a different charger and it stopped doing that....

I used another charger but the problem still exist

Screen doesn't respond to the touch

Well, it seem every phone I use in last 6 month getting this disease when you swipe or touch on screen and nothing happens, or when you press one key on keyboard and it inputs completely different character from opposite side of the screen...
Just now I had the same exact crap going on on Nitro!
I pressed and hold on back button on the gb keyboard and it was acting like I'm pressing random keys at 50 keys per second!
But before that I had trouble unlock the phone, since the slide off motion didn't register at all, the slider would move a few pixels and go back.
The weird fact is the most noticeable this occur when phone is plugged in and charging, unplug it and problem usually goes away or at least become manageable.
What the hell I'm doing to these phones that causing this? Actually this is the first phone where I f.k with the system files, all others I either used CWM or market, nothing else.

I have not had any touch screen issues with this phone other than its just a hair less sensitive compared to my captivate.

[email protected], are you a ghost? I have heard that sometimes phones will act strangely during use if you are a ghost. Something to do with spiritual electromagnitism. This would also explain why you are having compass issues!
Okay, so back to being serious. I've had the EXACT same issues you speak of when my phones (yes, this has happened to other phones too) were connected to 'dirty' power.
What I mean by 'dirty' is either a power supply that was very low quality or using a USB cable that the phone didn't like. Just recently my Nitro was acting erratically while I have it plugged into my computer. It shouldn't have been a problem because I was using a high quality, well shielded Blackberry branded cable (worked perfectly fine with my Nexus One), but as soon as I used the usb cable that came with the Nitro then everything worked correctly again.
Hope this helps!

i had that promblem today ... but nothing i did fixed it so i was able to pull the battery and do a dreded hard reset and its working as good as gold now

tokie_ said:
i had that promblem today ... but nothing i did fixed it so i was able to pull the battery and do a dreded hard reset and its working as good as gold now
Click to expand...
Click to collapse
Just got the same problem. Tried everything listed here to fix it. No luck.
Any other suggestions ?

I've found what Namuna said to be true. Also, I experienced this issue with my phone plugged into the power strip on the nightstand. Apparently there is a grounding issue in that power strip.
Sent from my LG-P930 Full Android on Emulator using xda app-developers app

AllstarE4 said:
I've found what Namuna said to be true. Also, I experienced this issue with my phone plugged into the power strip on the nightstand. Apparently there is a grounding issue in that power strip.
Sent from my LG-P930 Full Android on Emulator using xda app-developers app
Click to expand...
Click to collapse
Could be it. I use a power bar also. Plus I think I'm using a cable from a galaxy nexus now that I think about it.
Maybe I'll try to find an official lg cable.
Thanks again.
Sent from my LG-E973 using xda app-developers app

khanfed said:
Could be it. I use a power bar also. Plus I think I'm using a cable from a galaxy nexus now that I think about it.
Maybe I'll try to find an official lg cable.
Thanks again.
Sent from my LG-E973 using xda app-developers app
Click to expand...
Click to collapse
I haven't had a complete loss of touch responsiveness, but I have experienced the erratic behavior; but only when plugged in and only while charging in AC mode. I've noticed this a lot more since I dropped my phone with the charging cable attached... I can be in USB mode and the slightest touch will knock it off charge yet I have no touchscreen problems. Once, every now and then, I am lucky enough to get into fast charging AC mode; which is much more stable as far as touching and using while charging... but the screen is almost unusable due to the erratic touches. I turned on "show touches" in developer options and while in AC mode, it shows multiple touches in a horizontal line relative to where my finger is. It even affects my soft keys.
Happens with every charger I've tried; my original charger, both HTC chargers I have, and a charger I found a few weeks ago. I've experienced the problem in my house, multiple hotels, and a few other places; both with and without a power bar. Pretty much, what I'm saying, I'm sure I've been connected to a good grounded source of power, yet I still experienced those problems.
Out of curiosity... have any of you either replaced or had your digitizer replaced? I've replaced mine twice, and my problems began shortly after cracking the screen the 2nd time.

Well i tried the charger that came with my optimus g (using a power bar ) and it seems to work fine now.
One more thing i did was try it without my memory card for a bit. I don't know if that had anything to do with it also.
Anyways so far so good.
Sent from my LG-P930 using xda app-developers app

Help! Screen keeps turning back on after turning it off.

My vzw galaxy nexus keeps turning the screen back on as soon as I turn it off, killing my battery at an average of an hr, at most 2... Downloaded an app that tells u which apps are turning the screen on (wakelock) and it says none... App also tells how long phone has been awake vs asleep... Phone been awake for about 95% of the time... Please help... Phone almost unusable unless connected to charger... Oh, btw... As soon as I plug it in to the charger the problem disappears...
Running unrooted, stock 4.2.2 from vzw... If it helps...

amartinez7 said:
My vzw galaxy nexus keeps turning the screen back on as soon as I turn it off, killing my battery at an average of an hr, at most 2... Downloaded an app that tells u which apps are turning the screen on (wakelock) and it says none... App also tells how long phone has been awake vs asleep... Phone been awake for about 95% of the time... Please help... Phone almost unusable unless connected to charger... Oh, btw... As soon as I plug it in to the charger the problem disappears...
Running unrooted, stock 4.2.2 from vzw... If it helps...
Click to expand...
Click to collapse
I have recently come upon the same problem. Its from a galaxy nexus also from Verizon running 4.2.2 I recently got this gnex as a replacement from a lost gnex. Either refurbished or new the problem starts after I disconnect charger. Have you found any solution?

Sounds like a problem with your USB port.
Sent from my Galaxy Nexus using Tapatalk 2

Have you tried wakelock detector app? Helped me resolve the same issue..
Sent from the inner sanctum of my mind.

Prasad007 said:
Have you tried wakelock detector app? Helped me resolve the same issue..
Sent from the inner sanctum of my mind.
Click to expand...
Click to collapse
Yes I tried wake clock but it didn't help. Strangely it happens randomly. I took out the battery for 10 secs put it back in and is working properly. I will wait a while and post back tomorrow morning.

sanluisari said:
Yes I tried wake clock but it didn't help. Strangely it happens randomly. I took out the battery for 10 secs put it back in and is working properly. I will wait a while and post back tomorrow morning.
Click to expand...
Click to collapse
If you've used the app, you should know there's hardly anything random about it. When a particular wakelock has exceptionally high usage, Google about it (can be done from within the app) and get some insight into what is triggering it. Then you can disable/suspend that app/service.
Sent from the inner sanctum of my mind.

I had that happen on a custom kernel once. Flashed a different one and it was fixed....Doesn't seem like it'll help you though
Sent from my Galaxy Nexus using Tapatalk 4

i actually have the same problem! which rom are you running?

CRIME INC. said:
Sounds like a problem with your USB port.
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
I had that problem. Try to move that little thing in charging port with something thin, needle or knife. Thats how I solved it few months ago and since then I haven't had any issue. Hope this will help
Sent from my Galaxy Nexus using xda premium

Godra said:
I had that problem. Try to movproblemlittle thing in charging port with something thin, needle or knife. Thats how I solved it few months ago and since then I haven't had any issue. Hope this will help
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
I think that might fix it. Im still having the same problem, my fix is taking out the battery. I will try your fix and post back later.

sanluisari said:
I think that might fix it. Im still having the same problem, my fix is taking out the battery. I will try your fix and post back later.
Click to expand...
Click to collapse
Problem is no longer there. Just stopped doing it. ??????

My dose it when I'm at 100% battery after it drops below 90% stops doing that
Sent from my Galaxy Nexus using Tapatalk 4

Mine was having the same problem, but I followed the advice of an earlier post by Godra and it has stopped turning on automatically. Basically, I used my pocket knife to clean out under the pins in the micro USB charging port. I also bent it up just a little bit (be very careful not to break it) to keep it away from the metal housing, which is a ground. Something must have been shorting one of the pins to ground (the housing) causing it to continuously wake.
-rich

solved
Prying or cleaning the USB connector did not help in my case. Battery charge indicator sometimes stayed on, but sometimes not. Battery drained really fast.
I bought a charging flex connector board replacement (they are really cheap on ebay), watched some youtube videos explaining the how to change the board and when my new board arrived, my phone was fixed in under 15 minutes.
My gnex now holds charge for over 24 hours with moderate use.
With Jelly Bean 4.3 installed and a new charging port, it feels like a brand new phone!

open-source software solution
amartinez7 said:
My vzw galaxy nexus keeps turning the screen back on as soon as I turn it off, killing my battery at an average of an hr, at most 2...
Click to expand...
Click to collapse
Hi,
I have developed an open-souce (GPLv3) app that helps save battery when this happens.
http://forum.xda-developers.com/showthread.php?t=2484871
SnooZy Charger turns off the screen on these ghost connections, saving battery consumption by the display. It does not fix the charging issues, but it reduces the battery drain when this happens.
mudar
ps: sorry if this is considered as self promotion or xposting but this issue has been reported on multiple threads..

Hi, i had the same problemen as you all, but i solved the problem by remove all the dust from the input of the charger connection from the phone. I think that the dust was maken some kind of shortwire and that that was the reason for it to turn on the screen, after i cleaned all the dust from the charger point in the phone, my problem seems to be solved. Can some one else confirm this?

tcuwolf said:
My dose it when I'm at 100% battery after it drops below 90% stops doing that
Click to expand...
Click to collapse
I happen exactly that, how could you fix it?

Had the same Galaxy Nexus problem with the display switching on sporadically or turning back on seconds after the phone was manually switched off. The display was the number one consumer of energy due to energy statistics even without using the phone. Bluetooth, GPS were disabled and no special apps were running on the phone.
Hint:
The battery statistics graph's detail view logged charging events although the phone was not connected to a USB charger/port. The display was logged as active parallel to these events. So basically the phone thought it was connected to a charger and switched on the display which it normally also does, but since this charging status was repeating over and over, the display wouldn't turn off by itself.
Yesterday, I examined the USB port with a magnifying glass in bright light and noticed quite some fuzz build-up in the port. Otherwise the port looked good and not oxidized or damaged. So I removed the battery and cleaned off the fuzz from the micro USB port. I used a thin thread to loosen the felt-like lint which took me quite some time. Vacuum cleaner didn't work well. Compressed air might be helpful.
What shall I say: The phone charged very well and behaved normal the whole day without any unusual drain and NO pseudo charging events in the battery statistics!
Should this success not persist, I will report ...
GNUser

Screen turns on in pocket 7.1.1 NPF10C

If I cover the proximity sensor and try to turn the screen on, I'm successful. That's with both power button and fingerprint sensor. It didn't do this on the most recent 7.0, has anyone else had this problem? Androsensor shows the proximity sensor is working.

lightningdude said:
If I cover the proximity sensor and try to turn the screen on, I'm successful. That's with both power button and fingerprint sensor. It didn't do this on the most recent 7.0, has anyone else had this problem? Androsensor shows the proximity sensor is working.
Click to expand...
Click to collapse
Do you mean while in a phone call? I'm running NBD90W 7.0 and the proximity sensor doesn't prevent me from turning the display on while not in a call.
Sent from my Nexus 5X using Tapatalk

No, I mean while the phone's not being used. I used to be able to set my phone face down, touch the sensor, then it'd vibrate like it accepted the fingerprint, but the screen would stay off.
Sent from my Nexus 5X using Tapatalk

lightningdude said:
No, I mean while the phone's not being used. I used to be able to set my phone face down, touch the sensor, then it'd vibrate like it accepted the fingerprint, but the screen would stay off.
Sent from my Nexus 5X using Tapatalk
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Click to collapse
Interesting because I don't think that was ever supposed to be the case. I've never read that being a feature on the 5X nor Nexus 6P. Are you certain it wasn't just auto brightness? Cuz on mine, with auto brightness enabled, I can reproduce the scenario you are referring to. The phone does look "off" but it's just extremely dim due to the sensor being covered. Happens all the time when I'm in my car since I leave my phone in the cup holder.
Sent from my Nexus 5X using Tapatalk

I just checked my wife's phone, and you're right, her screen comes on. She's on NBD90W. Maybe it was on MM? Anyway, it's super annoying because my screen will turn on in my pocket and the emergency dialer will get hit. Then it's just pushing buttons for over an hour. (While at work, phone in front pocket)
Edit: I just remembered that this is a replacement device, received about a week ago. Maybe the old device was actually glitching in a good way? I just figured it was NPF10C because I've only really noticed it since I installed that version.
Sent from my Nexus 5X using Tapatalk

lightningdude said:
I just checked my wife's phone, and you're right, her screen comes on. She's on NBD90W. Maybe it was on MM? Anyway, it's super annoying because my screen will turn on in my pocket and the emergency dialer will get hit. Then it's just pushing buttons for over an hour. (While at work, phone in front pocket)
Edit: I just remembered that this is a replacement device, received about a week ago. Maybe the old device was actually glitching in a good way? I just figured it was NPF10C because I've only really noticed it since I installed that version.
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
This sounds like Ambient Display is turned on?
Sent from my Nexus 5X using Tapatalk

No, I've turned ambient display and the similar new motion in the Moves menu.
Sent from my Nexus 5X using Tapatalk

I'm trying the app, Pocket Screen Lock to see if it helps. It could be that my power button keeps getting hit, but I don't know how. I do move around a lot at work, though.
Sent from my Nexus 5X using Tapatalk

lightningdude said:
I'm trying the app, Pocket Screen Lock to see if it helps. It could be that my power button keeps getting hit, but I don't know how. I do move around a lot at work, though.
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
I'm not sure else it would be. I'm leaning towards the device possibly having a defect. Have you tried going back to 7.0 and resetting it there? I can't try 7.1.1 until it's official so I'm limited in what I can suggest.
Sent from my Nexus 5X using Tapatalk

No, I haven't. At this point, I'm going to stick with the pocket screen lock app, because I'm hoping to avoid wiping the device. Thanks for the help, even though you were mostly just a sounding board. It really did help out.
Sent from my Nexus 5X using Tapatalk

Touch screen problem without charging battery

Hi, recently I'm having a problem with the touch on samsung galaxy a5 2017, a lack of pressure because of the sweat and I thought I would solve it with a film protector, I did not solve then, but investigating I discovered that this bad pressure of the finger on the touch happens to me only when the phone is not in charge, while when it is in charge, everything is fine. I explain you. If I want to send a voice message on whatsapp, when I have sweaty hands especially, I can not record it more than 3 seconds, while instead if I try with the mobile phone in charge, then I turn off the screen, put it in charge, and try again, voila works well, I can drag the app, the widgets, while when I turn off the screen, I remove the charger, everything is back as before. What do you think is due to you? I also put "show touches" in order to see how it behaves during the charge, in fact during the charge I can even use the multitouch with 5 fingers together, while without a charger only 3 fingers detects me. I threw money for the films protector but apparently there is something wrong or internal, or at the software level, I also did a wipe data but I did not solve anything. What could it be?

UP

AntoKemz said:
Hi, recently I'm having a problem with the touch on samsung galaxy a5 2017, a lack of pressure because of the sweat and I thought I would solve it with a film protector, I did not solve then, but investigating I discovered that this bad pressure of the finger on the touch happens to me only when the phone is not in charge, while when it is in charge, everything is fine. I explain you. If I want to send a voice message on whatsapp, when I have sweaty hands especially, I can not record it more than 3 seconds, while instead if I try with the mobile phone in charge, then I turn off the screen, put it in charge, and try again, voila works well, I can drag the app, the widgets, while when I turn off the screen, I remove the charger, everything is back as before. What do you think is due to you? I also put "show touches" in order to see how it behaves during the charge, in fact during the charge I can even use the multitouch with 5 fingers together, while without a charger only 3 fingers detects me. I threw money for the films protector but apparently there is something wrong or internal, or at the software level, I also did a wipe data but I did not solve anything. What could it be?
Click to expand...
Click to collapse
Reflash stock rom and if the problem persists, it's a hardware issue.
Sent from my Samsung Galaxy A5(2017) using XDA Labs

iloveoreos said:
Reflash stock rom and if the problem persists, it's a hardware issue.
Sent from my Samsung Galaxy A5(2017) using XDA Labs
Click to expand...
Click to collapse
I had already thought about it, in fact I tried it now, and I did not solve anything. How should i do? How can it be a hardware thing if it only does it during the recharge?

AntoKemz said:
I had already thought about it, in fact I tried it now, and I did not solve anything. How should i do? How can it be a hardware thing if it only does it during the recharge?
Click to expand...
Click to collapse
Did you factory reset or did you reflash? If you reflashed then it has to be hardware. Then if it still has warranty I would return it. Because it sounds like the screen isn't getting enough power
Sent from my SM-A520W using XDA Labs

iloveoreos said:
Did you factory reset or did you reflash? If you reflashed then it has to be hardware. Then if it still has warranty I would return it. Because it sounds like the screen isn't getting enough power
Sent from my SM-A520W using XDA Labs
Click to expand...
Click to collapse
I solved by sending him in assistance, in just an hour they changed the display. It's back like new

AntoKemz said:
I solved by sending him in assistance, in just an hour they changed the display. It's back like new
Click to expand...
Click to collapse
Awesome!
Sent from my Samsung SM-A520W using XDA Labs