Part of my Nexus 4 touchscreen unresponsive - Nexus 4 Q&A, Help & Troubleshooting

I have originally asked the same question in purity rom thread but the issue comes again after half month.
Part of my touchscreen suddenly becomes unresponsive.
I have to swipe hardly on the screen in order to unlock my phone by pattern.
For the past few occurrence,the issue is gone when I charge my phone for a short period of time and the touchscreen is OK.
I am not sure if it is a rom (latest purity 4.4.2 rom 14/04), kernel (hellscore b46t4), app (touch control, nova launcher, LMT launcher) or hardware issues. I also have my SGP screen protector used over a year. Not sure what really happened.
I have flashed also franco and matr1x kernel but the issue persists.
I am charging my phone and hope the issue will be gone:crying:
My warranty is over and I really hope that was just a software problem.
I am with latest 4.4.2 purity rom, hellscore b46t4.
I have attached 2 screenshot from YAMTT and here is a screen recording video.
http://youtu.be/ObwgKMid9oo
If anyone experienced anything similar, please help.:fingers-crossed:
Thanks everyone

The problem comes again today.
I locked and unlocked the screen and sometimes the phone is have problems like nexus 7 2013 ghost touch problem.
Really furious

Hardware problem. Touchscreen partial failure, maybe due to overheating. Replace touchscreen.
Mine started doing this in the same area last month. I was able to enable autorotation under accessability, so now if I need to select something in a dead spot I rotate it and its no longer in a dead spot, well, usually.
Sent from my Nexus 7 using Tapatalk

Related

[Q] Strange screen issue with reboots

Hi.
I'm new to Nexus 7 and after a short time using it I began experiencing some strange issue with the it. While surfing the web over WiFi (note that I'm using the first Nexus 7 with WiFi only) after a short time glitching lines appear on the screen (as shown on the image attached) and some loud white noise coming from the speaker. It's stuck like this for about 30 seconds and then reboots. After reboot, everything seems normal, till it comes again. It takes 15-30 minutes of surfing and I believe the time depends on the intensity of surfing. Seems like WiFi modem somehow affects the GFX driver.
Note that I was first running android 4.1.1 and recently updated to 4.2. Updated didn't fix the problem. I've rooted the device with "Nexus 7 root toolkit v.1.5". Note sure if the rooting affected it somehow, as I rooted the device on second or third day of use.
Anyone have an idea of what could be wrong or how I might fix it? Or it's HW issue and I should turn it to Google?
Thanks!
So I'm the first and only one with such problem???:silly:
I could be wrong here but that seems like more of a hardware(warranty) kind of issue. However, I had the speaker issue after flashing a custom ROM (sparks linario 4.2.1) and I had the speaker issue (along with a host of other bugs buts that's beside the point). I flashed stock and unrooted and the problem was fixed... I know it might not help your case but I thought ide let you know. Its possible the toolkit caused the issues and flashing back to stock and rooting with another method may solve your issue (that's what I would try). But if you end up sending it in under warranty for god sakes, unroot and relock your bootloader first! Otherwise Google probably won't honor your warranty.
Good luck friend.
Sent from my Nexus 7 using xda app-developers app

[Q] touchscreen sensitivity

Hi all,
would like to ask for advice. I've been on my N4 for close to a year, but recently I've been having some touchscreen issues. on occasion, my nav bar alone does not respond to touch and would require a reboot. On other occasions, the whole screen does not respond and requires also a reboot. Most of the time, a single reboot would solve the issue, but sometimes it requires 2 or 3. Also, there is a particular area on the screen where the touchscreen sensitivity is essentially non-existent (i.e. any button at that area cannot be activated). has anyone ever encountered a similar issue and whats your fix? I'm rooted on PSX and hellscore.
thanks!
I had have had problems with the sensitivity. I flashed another rom and it was fixed. So it was a rom related issue.
Sent from my Nexus 4 using Tapatalk

Random touchscreen after 4.4 update

Hi,
I've just updated to 4.4.2 and my screen is acting crazy, when I touch in one point the screen reacts in a bigger area somewhere else. For example it presses all three bottom buttons at the same time, while i aim totally different area ;/
Any one has/had the same issue ?
While I don't have the exact same issue as you, I do have some random ghost touches and gestures being"interrupted" so to speak. It's pretty annoying cleaning the screen up a bit and lock/unlock it kind of goes away temporarily only to return. I had this issue with stock 4.2.2 as well though. For whatever reason I don't exhibit the same issues on aosp based Roms. I know others have had issues with touch as well with varying degrees. Perhaps the touch screen driver in the stock kernels just don't like me. Lol. Sorry nothing that really helps but take it fwiw. Yours sounds pretty extreme. Did you have any issues with it prior to the update?
Sent from my LG-D800 using Tapatalk

[Q] Nexus 4 Ghost touches

So I bought a used N4 sold as is because the seller said he had some issues with the ROM and the touch sensitivity and all it needed was a stock ROM flash. I took up the challenge and flashed stock 4.4.4.
While I'm at the home screen everything's fine, as soon as opened the app drawer there were random touches all over the bottom half of the screen. Some were shown in the center and many at the bottom left corner but most were just random. I mean like 7-8 touches per second. The same happened whenever I went into play store, Opera or Chrome. Didn't test it further since I decided to try another rom.
Flashed Purity ROM and at first glance it worked flawlessly. Not random touches in home screen, app drawer or settings. Then I flash Gapps and the same thing happens with Play and Opera.
The funny thing is that the problem persists but at different circumstances. Can't pinpoint the exact cause. Should I get a new screen and try? Or maybe something else is at fault there?
I've been having the exact same problem as you. It started after I replaced the screen and the usb flex.
Ghost touches 1-2 each second only on some apps (none on homescreen or settings). I noticed that it happen in 4.4.4 app drawer but not in the 4.2.2 app drawer. I got almost no ghost touches on 4.2.2 messaging app also. It happens in almost any app, like play store, dropbox,chrome....
I thought it was the battery so I replaced it, but it did not fix it.
I have been trying to troubleshoot the problem but I ran out of theories. I wish the best luck to find the solution, as I almost gave up on it. If you happen to solve it tell me.
I think i found out what's causing this issue.
My theory was that apps with a lot of white would trigger the ghost touches. So I tested with flashlight screen apps that only show white on the screen. As expected the ghost touches only started to appear when i turned the flashlight on.
Therefore my theory was correct.
In my case I will contact the seller that sold me the screen to see if I can get a replacement.
I've had the intermittent touch screen issue, just above the capacitive buttons and also the ghost touches.
Started about 2+ weeks ago.
I reverted back to the stock "HOME" launcher instead of the Google Now launcher and that seemed to have fixed the issue.
I will have to keep an eye out to see if it lasts.
Nexus4 Ghost touch navbar fixed (for rooted only)
Nubrig said:
So I bought a used N4 sold as is because the seller said he had some issues with the ROM and the touch sensitivity and all it needed was a stock ROM flash. I took up the challenge and flashed stock 4.4.4.
While I'm at the home screen everything's fine, as soon as opened the app drawer there were random touches all over the bottom half of the screen. Some were shown in the center and many at the bottom left corner but most were just random. I mean like 7-8 touches per second. The same happened whenever I went into play store, Opera or Chrome. Didn't test it further since I decided to try another rom.
Flashed Purity ROM and at first glance it worked flawlessly. Not random touches in home screen, app drawer or settings. Then I flash Gapps and the same thing happens with Play and Opera.
The funny thing is that the problem persists but at different circumstances. Can't pinpoint the exact cause. Should I get a new screen and try? Or maybe something else is at fault there?
Click to expand...
Click to collapse
Hi everyone. this is my first post. i may make some grammar mistakes, because english is not my native language.
I found a solution for the ghost touch issue on my nexus 4, so maybe it can help who is having the same problem.
1- Download and instal the NOMone Resolution Changer on Play store
(this is my first post here, so i cant paste de link here, but you will not have trouble to find it)
2- when asked, Allow superuser
3- open the app and change the height resolution to 1250. (it worked for me, but make some tests to see if you need to disable a bigger part of the screen to avoid de problem)
This is not the best way to keep using your phone, because you may lost a part of the usable screen, but worked for me.
Thanks!
I workaround this issue avoid using undervoling in the kernel, and avoid lower temperatures in phone, yes as you read ... this issue give my crazy when my phone was to hot and I tried to cold my phone using one ice cube in screen and back, the temperature of the phone down but ghost touches appears again, so played some videos to warm the phone again and dissapear again.
Don't ask me about how it works, or relation with screen, digitizer or battery, I don't understand but help me to workaround the issue.

[SM-G730A] ATT Galaxy SIII Mini (KitKat/Touchscreen Issue)

I am not sure how many owners of the SM-G730A are mobile gamers at all, but maybe some of you have noticed this...
Since the update to Android KitKat 4.4.2 the touchscreen behaves erratically in certain games, primarily FPS shooters. I know it is not an issue with my particular device, goto Google Play and look up Dead Trigger 2. View the reviews for this device model only, you will see numerous complaints beginning after the date the OTA was released (8/27/14) complaining about the touchscreen controls.
I have downloaded the kernel source code from Samsung for both 4.2.2 and 4.4.2. Upon examining the kernel source, the Atmel touchscreen driver has been updated in 4.4.2. I believe this to be what is causing the problem. I am not sure if it is configured incorrectly or if it is just a poor driver. The Jelly Bean driver gave NO issues what so ever. I would revert back to 4.2.2 Jelly Bean if I could. I also compiled a kernel for KitKat which includes the Jelly Bean Atmel driver, however due to the locked bootloader, it does me no good.
What happens is this, you will have two fingers on the screen. Suddenly it is as though you lifted one, even if you are still touching the screen. Touches are erratic for a few seconds after this happens, then touch returns to normal temporarily until it happens again (usually only a few seconds later). This makes using the device for gaming extremely annoying, and difficult. This issue does not occur in normal use, only gaming, where there is rapidly changing multitouch inputs.
If any of you have noticed this, maybe you can contact Samsung/ATT complaining of the issue, if we're lucky maybe a patch will be released. Or it will be fixed in a future firmware update. I already wrote to both, ATT says they will forward the complaint to their management, Samsung has yet to reply.
http://www.samsung.com/us/support/contact / [email protected]
Also, this is a video I created demonstrating the problem. The video includes annotations describing the issue that can only be viewed from PC YouTube.
https://www.youtube.com/watch?v=3FMEPB51Y-4
Thanks for reading.
Has anybody with this device tried a multi-touch test? I'm starting to wonder if it's related to my screen protector. The issue only started after the KitKat update though, immediately after. I do a good amount of mobile gaming or I'd never have noticed it still to this day. Never presents itself outside of fps games.
Best way to check (within multi-touch test app):
Touch screen with two fingers.
Keep one stationary and rapidly slide the other around for a few seconds then stop and lift that finger only.
The stationary touch will act as though you lifted even though you didn't.
Sometimes touches will be erratic for a while if the test is repeated several times.
If anyone tries this please let me know if you have a screen protector or not and how it behaved. Thanks.
Nobody with this device on KitKat is willing to do a multitouch test for me?
All you have to do is turn the phone sideways so the app is in landscape mode, touch with two fingers, one on each side of the screen.
Keep one still, move the other rapidly for a little while then stop, but keep touching the screen.
Does the app show that you lifted the other finger even though you didn't?
I'd appreciate it, trying to narrow it down to a kernel driver issue, or screen protector issue.
https://play.google.com/store/apps/details?id=com.rn.yamtt
quakeaz said:
Nobody with this device on KitKat is willing to do a multitouch test for me?
All you have to do is turn the phone sideways so the app is in landscape mode, touch with two fingers, one on each side of the screen.
Keep one still, move the other rapidly for a little while then stop, but keep touching the screen.
Does the app show that you lifted the other finger even though you didn't?
I'd appreciate it, trying to narrow it down to a kernel driver issue, or screen protector issue.
https://play.google.com/store/apps/details?id=com.rn.yamtt
Click to expand...
Click to collapse
Its the phone mine does these same. Might just be a cheap screen make
Deonta23 said:
Its the phone mine does these same. Might just be a cheap screen make
Click to expand...
Click to collapse
Thanks for verifying. It's not the screen itself from what I can tell. I tried this on Jelly Bean with no issues. I did go through the kernel source for KitKat and believe it is the KitKat kernel touch driver. I am hoping for ATT/Samsung to release a kernel patch. The multitouch was perfect in JB.

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