Develop Bugs

[Q] Broken screen impact performances?

Hi
something weird happened to me. My Note2 (TW rom + root) fell from my pocket and hit the ground, while I was driving my scooter, and I realized only a few KMs later...
After :crying: I was lucky enough to find a nice person that gave it back to me. So I was happy even if the screen was broken. The weird aspect is that since this damage, the phone is not working very well. It hangs (temporarily) and stutters, the battery is consumed more than normal, when you slide down the notification it get stuck in the middle of the screen. It is still usable and generally when you launch an app it works almost perfectly but the system is weirdly behaving. Another example is that when playing Google Music songs I have gaps.
It SEEMS that the processor is busy or has spikes of power that makes the other apps to behave slower.
So the question is: could be that a damaged screen impacts the sw behaviour (just an educated guess: maybe it's receiving lots of touch inputs due to the breaks...). If i repair the screen, will it go away?
Thanks

screen issue

Anyone notice, or experienced any issue in regards to the screen being unresponsive? Like the unlock screen when fully charged, and connected to the charger? Also during game play some times the screen wont respond accordingly to a joystick, or continue controlling a particular button while not being pressed. Even in game content isnt visible. Example: I play order and chaos online. For those unfamiliar its an mmo game (supersweet) generally on any other device, I could multiple mobs pf 10-20 with no issues. On this device however, I get maybe 3-4 mobs and they start to disappear and I am no longer able to see them. They still are attacking me, but I cant see them. Any suggestions? Screen issue? Should I try a rom? Im using samsung tab 3 10.1 wifi stock and rooted 4.3

Multitouch problem, screen is possessed

Hi guys I have a problem with the touch response on my G4 (H815)
Basically when I use multi touch (and sometimes just normal scrolling) in certain apps the phone will recognize screen taps at the bottom of the screen at the home and back buttons and sometimes other areas, I have used the 'multi touch app' from the play store to confirm that this is indeed the case. This is extremely annoying as apps exit by themselves because of this. It doesn't happen every single time either, just sometimes but often enough for it to be annoying and so may be hard to prove to my carrier or LG if i send it back cause they may say there's nothing wrong with it.
It seems like a hardware issue and in that case the phone should still be under warranty right? I got it in August and haven't rooted or done anything invasive.

There are many people having issues with the G4 touchscreen. Check with your carrier and see if you can exchange it or what your options are.

Hi,
Same problem for me, the back and home button seems possessed. Se this video dropbox.com/s/540ozmvdnhemv8f/MOV_0005.mp4?dl=0 for an example. I bought the phone Thursday last week and it have been this pretty much since unboxing. After a factory reset the phone acts normal for a couple of minutes or hours, but goes back to that stage were I can't use the phone at all. I've managed to update to the latest software but the problem didn't go away. I'll try to contact the supplier I bought the phone from and exchange it tomorrow.
Since I do not have enough posts to post external links you have to figure out for youself what to type infront of the "link" I included.

Note 4 Suddenly Having a Multitude of problems. Hardware Issue?

Hello, I have had my Note 4 for quite some time now and have not had any issues with it up until the last month or so.
At first it started out as just a hiccup every now and then, an example would be when I play music via bluetooth to my Jeep CD Player, I would sometimes have to turn bluetooth off then back on to get it to connect or reconnect.
Now things are getting out of hand. Here is a list of problems I have on a daily/hourly basis and seemingly at random times. I cannot reproduce any of these problems (except the NFC problem) on demand.
I have noticed that rebooting the phone will clear up these issues (except NFC) for a short time, SOMETIMES. Other times a reboot does nothing to help the situation.
Keyboard Lag
Sometimes when I press the keys the phone vibrates indicating a key press and magnifies the key that is being pressed, but fails to enter anything in the text box/input field. For the record I am using Swiftkey. I have noticed that this happens most often when I open an app via "popup notification." For example, if I were to receive an IM or SMS I would tap on the notification that pops up, which then switches to/opens the corresponding app. It is then I will more often than not have this issue. To remedy this I have to close and re-open the app, sometimes several times causing the keyboard to open and close, several times... Sometimes when I TAP a key, the phone will behave as though I have held the key down or performed a "long press." This issue is not exclusive to the keyboard, it often happens anywhere on the screen and with any app, usually indicating that I have been "long pressing" for about 1-2sec at a time.
NFC Does Not Work
One day while I was at work I attempted to add the office printer via NFC. To my surprise I was unable to turn on NFC via the "quick settings" drawer. In the quick settings panel the NFC icon would light up, as if it were turning on, and then just turn right back off again, this happens consistently. I went into setting to enable NFC that way and I am stuck with a slider that is actually in the "on" position but greyed out, I am unable to interact with it.
Bluetooth Connectivity
I have a JVC CD player in my Jeep, I often use YouTube or Google Play Music when I drive. Usually I do not have any problems connecting to the CD player at first, but after about 30-60sec of playback the audio goes blank. The app says that it is still playing however no audio can be heard. Then it will suddenly come back on after about 5-10sec, and here is where it gets strange. After the audio comes back on after this "hiccup" the playback is fast, as in it is playing at 2X's it's normal speed, makes the vocals sound like chipmunks. This will continue indefinitely until I turn on the screen, unlock the phone, then shut the screen off. Then the audio goes on playing fine. This happens with both YouTube and Play Music, while using YouTube the video gets sped up as well. I also experience issues with connectivity where sometimes at random the phone will just disconnect from the CD player, and refuse to reconnect until I have rebooted the phone, or if it does reconnect I get no audio until the phone is rebooted. I notice that this ONLY happens when connected via bluetooth. If I turn bluetooth off while this is happening music will play over the phone's speaker perfectly normal. My CD player has a hands free feature, and I do not seem to have any issues with phone calls, it's only with music playback do I have problems.
Originally I thought it was my CD player acting up, however in light of the other problems, and the fact that I tested it with my tablet and two of my friend's phones without issue, I don't think the CD player is the problem.
Sluggish/Glitchy UI
Sometimes when the phone really freaks out, the UI behaves very strangely. Sometimes notification Icons will hover above the running app, other times the whole screen will lock in place for a few seconds. Sometimes if the screen is locked up, I will shut it off, then turn it on, shut it off, turn it on. However as I press the power button to turn the screen on and off, nothing is happening, the screen just stays black while the "back" and "recent apps" buttons light up at the bottom. Then when the screen does finally come back in it will flash on and off quickly in accordance with how many times I pressed the power button. While all this is happening, if I hold the power button to turn the phone off, the power/reboot menu will appear without incident. Sometimes when I am swiping to unlock the phone, it does not register the full swipe. Basically it acts/appears as though I lightly touched the screen and moved my finger a half inch even though I have drug my finger all the way across the screen. To remedy that issue I have to SLOWLY drag my finger across the screen and then it unlocks without incident. I have also noticed that when I go to "swipe away" a notification, especially one that has "information" in it, it will swipe off the information but leave the notification there and display the app name the notification was from. An example would be, if I just installed an app (for example YouTube) from the Play Store, the notification will say "YouTube has been successfully installed." When I swipe either left or right to remove that notification, a "white ghost box" or "overlaying top layer" with the "successfully installed" text in it will slide away. However it leaves behind a green box/notification that says "Google Play Store" and that remains until I shut the screen off and turn it back on.
NFC Will Not Turn On
I simply cannot get NFC to turn on, the slider is in the ON position but is greyed out as I mentioned earlier. I would post a picture but I guess there is a 10post rule before I can do that. I have given up on NFC, mostly because I rarely use it, so it's really not that big of a deal.
Initializing the Camera
I use an app called "Telegram" instead of SMS messaging, thus I use Telegram to share pictures with friends. Sometimes, again I am not able to reproduce this problem on demand, the problem comes and goes seemingly at random. The camera will take more than 30-60sec to initialize, while I am waiting for it I am stuck with a black screen. If the camera doesn't initialize, shutting the screen on then off will take me back to the telegram app. I never get an error message or anything. Other times when I try to use the camera it pops on instantly and works flawlessly. Originally I thought this was a problem specific to telegram, however in the name of science I tested it with the default camera app and get the same results.
USB File Transfers
I'm not really sure this is specific to my phone, but whenever I transfer files from my PC to the phone or from the phone to PC, it is PAINFULLY slow. It's even painfully slow when the PC just displays what is in the folder. However I can't say for sure this is related because I never attempted to transfer files until I started having these issues, at which point I thought it would be a good idea to start backing things up.
Gets Stuck in 3G Mode
This happens rarely, not even sure that it's related but I felt that it was worth mention.
What have I done to try to remedy this problem you ask?
So far I have performed a non-root ADB nandroid backup, just in case factory resetting the phone didn't work.
I have factory reset the phone 2 times, I see no improvements.
I have cleared out my SD card/removed SD card
I removed and/or shut off bloatware apps (Yes I tested the phone without removing/disabling bloatware, still having the same issues)
Wiped cache via Recovery
I am not sure what else I can really do to fix the phone, I am starting to think that this is a hardware issue. I should mention that there was no significant event that I feel would cause these malfunctions. System update installed and worked perfectly up until this last month, I have not dropped the phone from significant height, the phone has an otterbox anyway. I have not gotten the phone wet, it has not been left outside, this phone has not seen any abuse what-so-ever. I just started having these problems out of the blue and they seem to be getting progressively more frequent and longer lasting. If I don't get any ideas from here I am going to try to get Verizon to replace the phone via insurance, however I don't have high hopes for that because I have grandfathered unlimited data and this is not the "original" phone that I had when I added the insurance option, so I am not sure it's covered.
Does anyone have any ideas on what could be causing this or anything I can do to correct it or try to troubleshoot it?
Any help is greatly appreciated!
Phone Information is as follows:
Samsung Galaxy Note4
Model: SM-N910V
Android Ver: 5.0.1
Baseband Ver: N910VVRU2BOG5
Build#: LRX22C.N910VVRU2BOG5
HW Ver: N910V.05
Verizon Wireless
Non-Root, Default Launcher, Not modified in any way.
I realize that this is a long post but whenever I ask for help I like to be detailed. If I left out any information that might be helpful please let me know.

Unfortunately, it looks very much like components on your logic board are going bad. Sometimes a few specific things will go bad that don't actually make the phone unusable, but make it act similar to what you are explaining. It wouldn't be worth the money you'd have to pay someone to track down the bad components and replace them. If you really like the note 4, I would just make a full backup with kies while you can, buy a new phone and restore your backup.

All of Kies backups do NOT restore to a new phone! Only contacts, messages and call logs will restore on a new phone. Use Samsung Smart Switch or Helium. Good luck
Sent from my SM-N910V using Tapatalk

outcasted2003 said:
All of Kies backups do NOT restore to a new phone! Only contacts, messages and call logs will restore on a new phone. Use Samsung Smart Switch or Helium. Good luck
Sent from my SM-N910V using Tapatalk
Click to expand...
Click to collapse
I see. I didn't know that because I've always restored my backups to the same phone. Thanks for the info.

Ghost touches in upper third of screen

Hi.
My Z1C seems to have a similar case of faulty display as described in some other threads here, but actually a bit different. The phone is stock, not rooted, running 5.1.1
Whenever I do something, there are ghost touches in the upper quarter or third of the screen. They only happen when I am not touching the screen myself. It happens no matter what I do. When I browse internet, it clicks links, when I scroll contacts, it calls people, when I am on facebook it gives likes etc... It seems like the more demanding task the phone is performing, the more ghost touches.
I turned on the developer settings and the "show pointer location" option, which leaves track of the last touch on screen, so I can research the issue.
I found out that when the phone is on home screen, it happens very rarely or not at all - the track of my last touch stays until screen turns off.
When I jump into the touchscreen service test, it does not happen at all. I can draw a line around the whole screen and it stays higlighted indefinitely.
In lock screen, it also doesn't happen.
I tried it in Sketch and it confirmed what I thought, when I was just sketching, from time to time a dot appeared in the upper part of the screen, but when the phone was downloading or installing in the background, the screen literally had seizures. I touched and released and then a storm of dots started to appear around the top part of the screen. It stopped after 5+ seconds, and after another input from me, the screen got another fit, drawing more dots.
I don't have any experience, but I think that since the problem doesn't happen constantly and it doesn't even happen at all in test mode, it could be a SW mistake.
I have found this thread https://forum.xda-developers.com/showthread.php?t=2691849 and I'm willing to try, but 1) my phone is still under warranty and 2) I have never done a root so I am not too eager. Do you think I should try that? Or has anyone found another solution for this problem?
Thanks.

Slivovidze said:
Hi.
My Z1C seems to have a similar case of faulty display as described in some other threads here, but actually a bit different. The phone is stock, not rooted, running 5.1.1
Whenever I do something, there are ghost touches in the upper quarter or third of the screen. They only happen when I am not touching the screen myself. It happens no matter what I do. When I browse internet, it clicks links, when I scroll contacts, it calls people, when I am on facebook it gives likes etc... It seems like the more demanding task the phone is performing, the more ghost touches.
I turned on the developer settings and the "show pointer location" option, which leaves track of the last touch on screen, so I can research the issue.
I found out that when the phone is on home screen, it happens very rarely or not at all - the track of my last touch stays until screen turns off.
When I jump into the touchscreen service test, it does not happen at all. I can draw a line around the whole screen and it stays higlighted indefinitely.
In lock screen, it also doesn't happen.
I tried it in Sketch and it confirmed what I thought, when I was just sketching, from time to time a dot appeared in the upper part of the screen, but when the phone was downloading or installing in the background, the screen literally had seizures. I touched and released and then a storm of dots started to appear around the top part of the screen. It stopped after 5+ seconds, and after another input from me, the screen got another fit, drawing more dots.
I don't have any experience, but I think that since the problem doesn't happen constantly and it doesn't even happen at all in test mode, it could be a SW mistake.
I have found this thread https://forum.xda-developers.com/showthread.php?t=2691849 and I'm willing to try, but 1) my phone is still under warranty and 2) I have never done a root so I am not too eager. Do you think I should try that? Or has anyone found another solution for this problem?
Thanks.
Click to expand...
Click to collapse
As You have warranty, I would strongly suggest that You go for a repair. I had the same issue in beginning, ghost touches appearing randomly, going away only after reboot. I was rooted and xposed, so went full stock without restoring any apps or data from internal storage, yet the problem remained, thus ruling out the point that it was software problem. And then after a week or so, that much part of screen stopped responding to touch entirely. You can see details over here, Another user had same problem as Mine and had the same end result,

OK then, I'll go for a repair. Thanks for the tip.

Slivovidze said:
OK then, I'll go for a repair. Thanks for the tip.
Click to expand...
Click to collapse
I am having exactly the same behaviour as you described .
Ghost touches happening on the upper part, and triggered when a demanding task is running.
Actually I didn't realized completely about this, I thought it was just random, but right now after I saw your post, I tried an app similar to Sketch while upgrading apps or playing a video in the background. And dots in the upper part start appearing crazily.
Did the phone repair solve your problem ? Mine is not in warranty, so I'll have to pay for it.
But also in my case, before this thing happened, I got some water damage and that upper quarter of the screen stopped responding.
After replacing screen+digitizer I got this very specific behaviour you described.

karamaz0v said:
I am having exactly the same behaviour as you described .
Ghost touches happening on the upper part, and triggered when a demanding task is running.
Actually I didn't realized completely about this, I thought it was just random, but right now after I saw your post, I tried an app similar to Sketch while upgrading apps or playing a video in the background. And dots in the upper part start appearing crazily.
Did the phone repair solve your problem ? Mine is not in warranty, so I'll have to pay for it.
But also in my case, before this thing happened, I got some water damage and that upper quarter of the screen stopped responding.
After replacing screen+digitizer I got this very specific behaviour you described.
Click to expand...
Click to collapse
In my case, I realized that I bought (probably) a badly re-fitted phone. Display's backlight was visible around screen panel edges, where I'd say it shouldn't be visible at all. I decided to return the phone and got a refund.
Sorry for not being able to help you.

Slivovidze said:
In my case, I realized that I bought (probably) a badly re-fitted phone. Display's backlight was visible around screen panel edges, where I'd say it shouldn't be visible at all. I decided to return the phone and got a refund.
Sorry for not being able to help you.
Click to expand...
Click to collapse
Ok. The aftermarket screen I got has that issue with the screen edges also. Very probable you are right.
In my case I water damaged myself. It seems that after 2 years of intensive use, waterproofing is gone, by accumulation of slight hits or so, never had a single crack on the screen. I read many posts reporting this happening, even with much less use time.
Too bad, I loved the phone, but I'm afraid that sending it to repair will mean to change the PCB or similar for a complete fix, which can come to a ridiculous price.
Seems it will be time to move on...

Yeah. If you want it fixed properly, you'd need to send it to Sony, and for the money it would cost you, you can probably gen a new phone. Sadly, similar phones aren't made anymore.