Database Users

[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.

Nexus 6p 7.1.1 scroll lag

I'm running stock android 7.1.1 on a Nexus 6p and there's a dramatic lag in scrolling response. When the screen is scrolling quickly and I put down my finger to stop the scroll there is a huge lag before the scrolling stops. About half a second or more. It seems to occur in all apps (and even system settings menus). I've had this problem since buying the phone a couple weeks ago. It's driving me nuts. I never have this problem with my iPad, MacBook or even my ancient nexus 4. The odd thing is that if instead of just putting down my finger I drag my finger slightly (in any direction) then the lag almost disappears, but obviously that's a very awkward thing to do, especially when none of my other devices require it. Does anybody else have this problem (and hopefully a solution)?
I've talked to Google customer support. They told me to clear the cache of every app (yes that does take quite a while) and to clear the partition cache. This did not resolve the problem and now they want me to do a factory reset, which apparently is the last step before hardware warrantee measures. I'd love to know if this is a common problem.

Al--g said:
I'm running stock android 7.1.1 on a Nexus 6p and there's a dramatic lag in scrolling response. When the screen is scrolling quickly and I put down my finger to stop the scroll there is a huge lag before the scrolling stops. About half a second or more. It seems to occur in all apps (and even system settings menus). I've had this problem since buying the phone a couple weeks ago. It's driving me nuts. I never have this problem with my iPad, MacBook or even my ancient nexus 4. The odd thing is that if instead of just putting down my finger I drag my finger slightly (in any direction) then the lag almost disappears, but obviously that's a very awkward thing to do, especially when none of my other devices require it. Does anybody else have this problem (and hopefully a solution)?
I've talked to Google customer support. They told me to clear the cache of every app (yes that does take quite a while) and to clear the partition cache. This did not resolve the problem and now they want me to do a factory reset, which apparently is the last step before hardware warrantee measures. I'd love to know if this is a common problem.
Click to expand...
Click to collapse
Hi, I made some tests in your issue doesn't occur on my 6P with stock 7.1.1.
Sent from my interstellar 6P

same here

Al--g said:
I'm running stock android 7.1.1 on a Nexus 6p and there's a dramatic lag in scrolling response. When the screen is scrolling quickly and I put down my finger to stop the scroll there is a huge lag before the scrolling stops. About half a second or more. It seems to occur in all apps (and even system settings menus). I've had this problem since buying the phone a couple weeks ago. It's driving me nuts. I never have this problem with my iPad, MacBook or even my ancient nexus 4. The odd thing is that if instead of just putting down my finger I drag my finger slightly (in any direction) then the lag almost disappears, but obviously that's a very awkward thing to do, especially when none of my other devices require it. Does anybody else have this problem (and hopefully a solution)?
I've talked to Google customer support. They told me to clear the cache of every app (yes that does take quite a while) and to clear the partition cache. This did not resolve the problem and now they want me to do a factory reset, which apparently is the last step before hardware warrantee measures. I'd love to know if this is a common problem.
Click to expand...
Click to collapse
You aren't the only person who has experienced this issue but I haven't had it happen. I don't know if anyone found a solution but if you do a search in this section you should find a thread very similar to yours with a lot of responses. I think some people experienced the issue after updating to 7.1.1

jhs39 said:
You aren't the only person who has experienced this issue but I haven't had it happen. I don't know if anyone found a solution but if you do a search in this section you should find a thread very similar to yours with a lot of responses. I think some people experienced the issue after updating to 7.1.1
Click to expand...
Click to collapse
Thanks, I'll have a look. (Tried searching before but didn't find anything.)
For me the problem predates 7.1.1

I found the source of my scroll lag issue. I sometimes enable the magnification gesture in the accessibility settings (because I often use a particular transit app that has insanely small icons). I realized that when I have this setting turned on the scrolling gets laggy. Turning off the magnification gesture seems to solve the problem completely. Not sure if there's any workaround other than disabling the gesture setting.

Touch Screen Sensitivity Issue

Hi all,
I just got an S7 as an insurance replacement, and the touchscreen has been very inconsistent when scrolling through web pages, apps (Facebook, Twitter, Tapatalk), and even the launcher.
Scrolling through these sites, the page jumps ever so slightly, but it's enough to give me a headache after 20 minutes. Typing works just fine, though.
Before I call to get another replacement, is this a known problem with the S7s? Or did I just get a bad refurb?
- I'm coming from a Nexus 6
- I searched the forum
- Running stock Nougat, not rooted or modified
- I performed a factory reset after Nougat update, problem still exists
Thanks!
Sent from my SM-G930V using Tapatalk

Glitch when watching videos

Hello everyone, I want to share with you a problem that I met with my S8 since I have it (<1 week).
Everything works fine except when the screen shows a video, whatever it's on YouTube, FB, Twitter, or even integrated videos on other apps, on the screen appears some randomly placed lines of pixel that are not refreshing, like a lag, and generally it makes the phone crash and reboot.
This problem is kind of random also, maybe 80% of the time.
Also this problem doesn't occurs when watching GIF or playing games
From my point of view, I have no clue if the issue is software or hardware.
For now all I tried is :
- Factory reset from the recovery
- Factory reset from Odin
- Safe mod boot (and it is still doing the same problem)
- Installed Android 8.0 beta
- tried to modify the animations on the development mode
- modified the screen resolution
And nothing is working. For now I didn't wanted to root it and install a custom ROM, because I don't know if it will change anything.
Anyway if you have an idea what it could be I would be really thankful. Also I heard that some had an issue with random reboots, but i've never seen a post mentioning this issue.
My s8 is a SM-G950F

Did you find any solution?

Touchscreen Issues

I've just purchased a Tab S5e but appear to be having some issues with the touchscreen. I first noticed it when scrolling, occasionally the scrolling would stop and the device would click on anything that was under my finger. I also noticed this when playing a game where a finger needed to be held on the screen, it was sometimes appear to the game that my finger was removed.
I recorded a video of what i'm experiencing here: https://drive.google.com/file/d/1-33ixSpHRijjhb8g-MNLvbjMvuPRuGrQ. I did not remove my finger at all whilst drawing in white, but gaps appear.
I guess my question is has anyone else experienced this, or could this be a hardware fault? I thinking of returning this and waiting for the S6e or similar rumoured to be out soon.
Thanks all!

I'm experiencing touch screen problems where I sometimes need to tap the display 3 or 4 times before the screen will register the touch. I've only had mine for a few days but Im thinking about returning as well.
I was going through the threads for the first time to see if there were similar issues reported or tips to minimize the issue.
After switching from the Huawei Mate 20 Pro to the Samsung S10+ and from a Huawei tablet to this I have to say I'm seriously underwhelmed with Samsung.

jhs39 said:
I'm experiencing touch screen problems where I sometimes need to tap the display 3 or 4 times before the screen will register the touch. I've only had mine for a few days but Im thinking about returning as well.
I was going through the threads for the first time to see if there were similar issues reported or tips to minimize the issue.
After switching from the Huawei Mate 20 Pro to the Samsung S10+ and from a Huawei tablet to this I have to say I'm seriously underwhelmed with Samsung.
Click to expand...
Click to collapse
Did you somehow solve the probelm?

k.bergmann2 said:
Did you somehow solve the probelm?
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Click to collapse
Nope. The problem doesn't occur when playing games or using apps that test the display--but does with pretty much everything else. Some apps also have very pronounced jelly effect while scrolling including the Samsung Members App--scrolling through posts has so much jelly effect it makes me feel like I'm going blind.
Earlier Galaxy Tab devices had a calibration setting to adjust touch sensitivity but the type of panel used in the S5e apparently can't be user calibrated. Some people have claimed that the pointer speed setting is the same thing but touch sensitivity and response speed aren't the same thing and increasing that setting to the max didn't improve anything for me. If you want a faster response that's one thing but if the touch doesn't even register in the first place then there isn't anything to speed up.
The game optomizer service running in the background clearly ramps up the kernel when playing games to eliminate or minimize the touch issues and display test apps are treated like games and also get the extra performance boost--but with a locked bootloader I don't think there are any user options besides not purchasing Samsung in the first place.

Would a custom rom solve this?

k.bergmann2 said:
Would a custom rom solve this?
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Click to collapse
I always check before buying a tablet to make sure there is developement of custom ROMs in XDA. And the first thing I do when I get one is to root and install one. Are there still "touch problems" with my ROM? Yes and no. I've noticed with this and other tablets that when the tablet first boots, there can be a lag in touch response. But I don't think it has anything to do with "touch sensitivity". I think the problem is that the OS is still "setting up" and just isn't ready to accept touches. (Try it on a Win 10 box. There is a terrific delay between the time the desktop screen first appears and the time it is ready.) This can also be true of apps. The screen can display before the app is ready for input. IMNSHO, I think some people just love to find reasons to knock "the vendor they love to hate".:crying:

Since I bought this tablet, I noticed that issue, the screen detects the touch, but it does not perform the action I want, open an app, select something,etc. I learned to live with it, but that is annoying !!, I installed a Custom ROM specifically [ROM] [UNOFFICIAL] [gts4lvwifi] [10] LineageOS 17.1 and I can confirm that the issue disappears, the problem for which I returned to STOCK, is the cut down quality of Amazon Prime Video, Netflix, because Widevine Level certification . and now in STOCK, I lost Samsung PASS, because it detects that I have the rooted device. fyi, my model is SM-t720.