Database Users

Ghost touched on HD2

Hi all,
I have replaced touch layer in my hd2 and buttons. Everything was great, but sometimes HD2 has very strange behavior. For example, Iam at home screen, just scrolling thru apps, when suddenly touch layer starts to recognize touches in upper part of display. This can happen even when I dont have any fingers on phone ... If I want to stop this I usually put multiple fingers on layer, or just go to lock screen. So Iam wondering if my touch layer isn't somehow broken, or if is there any short circuit or something else? Do anyone of you have same experience as me?
Thx for all tips

[Q] Nexus 4 Ghost Touch Workaround Idea

Now I know this problem has been asked before but after some extensive searches I can see there are no clean fixes for this.
My Nexus 4 (Android 5.0.2 LiquidSmooth ROM) has started showing ghost touches at the bottom part of the screen. I know there are a lot of explanations available such as digitizer not working, battery being too old etc. But I'm not interested in these hardware issues/fixes.
I have isolated the area of effect as the bottom ~160 pixel height of the device. I then proceeded to use the ADB shell command
wm overscan 0,0,0,160
which removed that portion from the UI. This fixed the effects these phantom touches have on the apps or UI. But a problem still remains that these ghost touches happen in too many numbers and this leaves other usable areas of the screen insensitive to touch. I am guessing this is due to the multi touch limit being reached in that bottom unused part itself. Multi touch testing apps dont pick up touches on the top part of the screen
So my question is, is it possible to remove a part of the screen from the System itself? Ideally a thick black bar of unused area, leaving me with a shorter yet fully working screen? Or atleast is it possible to turn off touch response in that lower part of the screen so that it doesnt max out the multi touch limit?

My Nexus 4's is same too
I think, that ghost touch will work from Screen Digitizer. My Nexus 4's screen digitizer was non-LG's digitizer, it was fake. I need to change that digitizer

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.

Touch randomly unresponsive

So my fingerprint sensor on my OP2 broke and i replaced it with no problems. However, shortly after i noticed that the every so often the phone becomes unresponsive to touch (except the capacitive buttons which remained active). After living with it for a few days its gotten to the point where its unusable and the capactive buttons even present the same problems now but i have noticed that pressing hard on the screen around the fingerprint sensor fixes the issue until i release it again. I have disassembled it many times and i cannot see any fault. Ive checked all connectors, ensured the LCD was properly grounded on the chassis and even tried insulating it from the chassis.
Any ideas?

grounding issue

I got a problem with ghost touches, which happen randomly, very annoying when typing especially when swipe typing
Sometimes when I just hover my finger near the screen without actually touching it, the screen registered a touch by itself
I believe this is a grounding issue since changing the touchscreen set didn't fix it, and I don't want to open it again just to put insulation tape on the aluminium body which touches the touchscreen's flex, since opening it have a great risk of breaking the touchscreen set again
So I try adding line
persist.usb.hvdcp.detect=true
Into the build prop, and it didn't help
Any better idea?

While charge or while portable without charge?

Without charge and with charge is the same

Ghost Touches on the Bottom end of the Screen and Hardware Keys

My Device was working fine until Yesterday I began to have ghost touches and was having trouble even to make a call... I thought it might be due to My Tempered Glass Screen Protector so I removed it but still I have the same issue... I tuned on the option to show touches and found out it was only on the bottom end of the screen (and sometimes My recent key is also triggered)... I felt it to be affecting TWRP as well... What could be the issue and how can I solve it???

SingularityHRT3 said:
My Device was working fine until Yesterday I began to have ghost touches and was having trouble even to make a call... I thought it might be due to My Tempered Glass Screen Protector so I removed it but still I have the same issue... I tuned on the option to show touches and found out it was only on the bottom end of the screen (and sometimes My recent key is also triggered)... I felt it to be affecting TWRP as well... What could be the issue and how can I solve it???
Click to expand...
Click to collapse
are you using oily hands on the device too often?Beware the screen digitizer and other display components of this phone are of cheap quality(it is xiaomi after all)you will most probably have to get your full screen replaced for around 2.5k.