Develop Bugs

Misinterpreted touchscreen-input and partially non-reacting touchscreen

Hey guys, I've got two problems with my unrooted stock HOX , which both are touchscreen related
1. When I push a little harder on the upper right corner of the touchscreen while in lockscreen, the diplay recognizes 3 other inputs on the left side of the screen (all of them about 2cm apart from one another, sometimes there are even more inputs randomly placed) which are slightly shaking but always appear in the same places. When this occurs, the display doesn't recognize any other inputs for about 4-5 seconds, then the 3 faulty inputs disappear and touchscreen works again. Okay, this could be of the harder pressure but the thing is, that when I'm doing the same in my homescreen or somewhere else, it doesn't happen. The problem with this occurrence is, that I often can't unlock my phone immediately and it also appears when I get an incoming call, so I am unable to answer it the green circle won't react on my input. But the fact, that it only occurs in lockscreen makes me wonder if it could be a simple software error and not hardware.
2. Sometimes (usually in combination with problem number 1) a part of the diplay doesn't react to any input whatsoever, but the rest of the screen does. I usually recognized that while typing messages and the area affected is an about 1cm high horizontal strip which is located in the height of the letter A in the portrait keyboard and goes all over to the letter L (I hope you understand what I mean ). I made it visible via a painting programm and it's a perfectly straight area. But when I now turn the display off and on, everything is fine again, so this makes me think (and hope) that this is a software error too.
I tried factory resetting but this wouldn't work out, at least the first problem still occurs (did the reset yesterday, so I can't rule out, that the second one still exists). I don't want to send my HOX in again, because this one is apart from that very nice and has no other faults.
So the main question is: soft or hardware and what could I do against this?
Hope you guys can help!

[Q] Strange issue with touch detection at the top of my screen

I noticed after upgrading to Lollipop that it was difficult to navigate menus near the top of the screen in some apps. I turned on the "pointer location" option and sure enough I found very strange results.
i.imgur com/tPdVowo.png (you'll have to add a period after the domain name, new user status prevents me from posting links)
This first screenshot is me running two fingers all the way to the top of the screen, and once i reached the top i ran them towards the edge of the screen. As you can see there is an area where the pointer location bugs out.
i.imgur com/bh5hWeV.png
This image is just a single finger running horizontally across the top of the screen. The top line is where my finger actually was, but the phone also registered extra touches as you can see from the line below. There's even a section where the top line didn't register at all.
This is a Verizon phone, never been rooted, and hasn't been dropped or wet. I noticed while making this post that the area i am having issues with aligns almost perfectly with the top part of Sense's notification menu.
Is this normal or do I need to exchange my phone?

I am having the same issue with my phone. When I turn on show touches in developer options or install a multitouch test app, it'll show an extra touch just below where I'm touching but only when I'm touching at the top of the screen. Stock lollipop, never rooted, no water damage.

Bump

same problem. do you have s-off? downgrade firmware and rom - maybe this fix problem?

bumbarush said:
same problem. do you have s-off? downgrade firmware and rom - maybe this fix problem?
Click to expand...
Click to collapse
I don't. I didn't want to do that yet. Was hoping to see if anyone else had the issue and if they were able to resolve it.

Just want to see if anyone was able to resolve this issue.

fixed!
we need the old piezo lighter's element. The phone must be turned off. A few strokes on the screen near the problem area, and voila, the screen works again. Do not be afraid, the phone will not be damaged
i

on russian:
http://4pda.ru/forum/index.php?showtopic=496511

Long press not working anymore on some parts of the screen

Hi,
The title speaks for itself.
Big issue here, long-press on the screen of my D855 doesn't work anymore.
Touchscreen is fine but long-presses just acts like a normal press.
I can't tell when exactly this bug started but it's really annoying since some actions can't be done without it (can't move icons, play specific games, etc...)
The lower end of the screen works fine tho (navigation buttons and apps dock) but everything above don't.
Some rare times it works with no particular reason.
Can someone help me with this ?
Is it hardware or software related ? (updating firmware to V21a didn't solved my issue).

Bu chance u aint got a glass protector on do you

No glass protector.
Stock Rom.
This is a really weird bug because it works 1 time after a "pinch to zoom" for exemple and then again it stops working

Off top of my head try if ure rooted xposed like g3tweakbox or gravity box one of 2 change long press behavior or or goto acseability and change touch feed back time to short

I have the same problem, whenever I scroll down/up, it goes directly at the bottom/top. Sometimes, it goes back to normal, I don't even know why but frequently it goes back to the problem. I had already gone to Accessibility, ..., set it to slow and it seems not to work. What to do? :/

Scrolling stops when i take off my finger PLS HELP

So i bought a oneplus 5t with a slightly cracked (only one crack on the top of the screen, and it's not catastrophic) but (almost) fully functional screen.
It detects every touch accurately, 3 fingers same time, etc.
The only problem is, when i want to swipe (even on the home page, when u wanna scroll down the status bar f.e.), it stops scrolling the exact moment i take off my finger, or scrolls just a little bit.
I'm aware, that the crack on the screen might be causing it.
I did the factory mode calibration. I did reset the whole phone, hoping the problem somehow gets solved, but it didnt change anything.
The problem is very consistent, therefore it's useable, if you accept the fact, that the screen responds only when your finger is touching it and no longer.
I feel like if i could change the sensitivity of the touchscreen, or the responsiveness on the gestures it receives, i were able to make it just as new.
Oneplus 5t (OOS 10.0.1, TWRP and Magisk installed, in case you have some app or sth that requires root)
(I couldnt find the parameters that has relation to touch sensitivity in the build.prop file, i'd be glad if someone linked me a guide)

Question Touch/tap problems

I'm having problems with my Fold 4 not registering taps. I tap a space on the screen and nothing happens. I do it several more times, and finally it responds. I haven't seen a clear pattern yet, because it's somewhat intermittent. Has anyone else seen this problem?
I'm slightly suspicious of the Microsoft launcher here., but I suspect that's because it gets the majority of my taps, it being the launcher. I haven't had that problem in the past.
Just a minute ago I sat down to make a video of what I was seeing in case I thought an exchange might help. It happened on the first try, and I wound up having to press it five times with escalating pressure to finally get it to react. For the record, I have not seen a correspondence between pressure and the problem. I think I just naturally start pushing harder and when it works, it feels like it was more pressure. But when the problem isn't occurring, it takes very little pressure to register a tap.

Not using the Microsoft Launcher, but I am using SwiftKey, and I do have the same issue, especially with the space key. Mostly with the outside screen BTW.

Ah, I should have been more specific. Yes, I've only seen the problem on the outer screen so far. And I'm using gboard for my keyboard.

I've had a similar issue but it seems to have gotten better. Being intermittent makes it hard to pinpoint

I initially transferred apps and data from my Note 20 and was having issues on the outside and inside screen of taps not registering. Finally did a FDR and set up from scratch, haven't had the issue again. I always setup from scratch and took a shortcut this time, lesson learned!

ggrant3876 said:
I initially transferred apps and data from my Note 20 and was having issues on the outside and inside screen of taps not registering. Finally did a FDR and set up from scratch, haven't had the issue again. I always setup from scratch and took a shortcut this time, lesson learned!
Click to expand...
Click to collapse
I actually did an FDR last yesterday to try and solve the problem. Naada. It was still there for me.
I'm currently using Samsung's OneHome UI to see if it's something with the MS Launcher. Good god, I hate their launcher!

It feels like the sensitivity on the outer (cover) screen is too low, and combined with much smaller keys on keyboards (I use GBoard) there are plenty of missed hits and no response. Try turning on touch sensitivity and see if it improves ( Setting -> Display -> Touch Sensitivity. Mine went a tad better. I also changed the layout preferences to 'normal' keyboard height and most of my misses are now gone..

I'm having same issue but not with the keyboard but with tapping on apps on the home screen. I'm able to almost reproduce it every time in the middle of the screen. Is there any update on this issue?

I've got same issue that a tap on a app gets no action. Happens occasionally. Must be a bug.

After a factory reset mine has come back too. Hopefully we will get some bug fixes with the September security update.

imanony said:
I'm having same issue but not with the keyboard but with tapping on apps on the home screen. I'm able to almost reproduce it every time in the middle of the screen. Is there any update on this issue?
Click to expand...
Click to collapse
Same. I never have a problem in application, it's only when I'm interacting with the launcher.

I think the issue is with the refresh rate dropping. I used the galaxy max hz app and increased the base hz on the phone and I'm noticing response being much better now.

I also have this issue on my Fold 4's cover screen. I've always used the debug option to show where I touch, and when my touches don't register I still see the touch indicator, so I can only assume this is a software issue not deciding what to do with the touch. I think One UI might be overly sensitive for gestures, and detects taps as drags/swipes. A mini swipe on an app or folder on the home screen for instance won't do anything (which happens to me frequently).

I've had that problem quite a few times as well, not enough to drive me crazy but enough to be slightly annoying. It only happened when taping on the bottom of the screen. It often registered my taps as a swipe up. I saw the homescreen starting to go up slightly as if it was going to enter the drawer. Then one day I realized it was my way of tapping the screen that was the culprit. The way I hold my phone makes me ever so slightly swipe up as I tap the screen, but only when taping the bottom part, if I tap anywhere else, I don't tend to move my finger up as I tap. Of course, I'm talking minuscule amount of swiping here, probably less than a millimeter. It's just the way I hold the phone and move my thumb, it's personal, and I think everyone is going to have a different experience depending on how they hold their phone and tap the screen. Anyway, I'm not saying "you're using it wrong", because I think it's a problem samsung must fix, as I don't have that problem on any other phone. Probably too sensitive. I just tried to reproduce the problem as I write this message, and succeeded twice in less than 20 tries, so definitely the problem is still there. It's just that now I tap straight on instead of "sideways", and it works just fine. Just a workaround, I know...
Edit: on the cover screen, of course. Inside screen works fine with crooked taps.

Glad im not the only one. On the outer screen i have had times where I have to tap something 3 times for it to register... I never had this issue with my Z Fold 2