Periodic recurring touchpad problem - Redmi K20 / Xiaomi Mi 9T Questions & Answers

I've read about similar problems. For some time, the right side of the phone screen has started responding strangely and imprecisely to touch. It is annoying because it causes huge problems with the use of the phone. The weird thing is that turning the phone off and on briefly fixes the problem for a while but the problem comes back soon. Now I have a Havoc ROM but MIUI the problem was identical. It's something with hardwate or drivers, I think. A temporary shutdown fixes this problem for a short time, so it is not permanent damage. Unfortunately, the phone is over a year old and there is no warranty. Has anyone experienced such symptoms?

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random vibrations

Another issue here. Installed lastest slimkat and i keep getting random vibrations. I dont know whats causing it. Sometimes the vibration stays for 8-15 seconds. And other times its real short. I think i saw someone posted a similar issue before, but i cant find where it is.
Anyways, anyone else with this problem?
Update: ok so i think i found out what is causing the random, out of no where, vibrations. Reinstalled slimkat with complete clean wipe, still having issues. Then i decided to turn off anything that causes vibrations, starting with keyboard (which i had turned on for 1ms duration). Luckily, that solved the issue for me. I havent had random vibrations since then.
This is just a possible solution for others who may encounter same issue in the future.

[Q] Nexus 4 Random restart

So recently ever since the android 5.0.0 update I have been experiencing my phone randomly shutdown, or more a less in a crashing manor since it never does the shutting down dialog it just goes black. It happens especially when my battery is below %50 but not fully discharged. At first I thought maybe it was just the stock rom and one of its possible glitchs, but then I changed over to CyanogenMod 11 and it is still doing the same thing. Im thinking its something physical with the phone because out of rage , and hopefully no judging, I punched my phone and it happened again. I dont see why it happened because and dont think that the punch was the direct cause because it happens in my pocket, and I even gave it a violent shake just to see if that was one of the problems. Has anyone experienced this? Ive looked through other posts and none of the fixes seem to work. Ive had the phone for over a year and a half and now since I installed 5.0.0 its restarting randomly.
http://forum.xda-developers.com/nexus-4/help/nexus-4-randomly-off-intermittently-t2077148/page2
same issue here
i am also facing same issue here and havent found any solution for the same,
any suggestions what cna be done..?

weird screen issue

I've got this weird issue. it's now happened twice randomly.
the screen fuzzes out, goes weird. nothing helps other than a reboot.
Does it possibly mean the screen is dying out?
here's a photo
It has happened with other users of this phone too. However it happens hardly once in a while like once or twice in a month or something. A simple reboot solves it as always. I would say no it's not dying, just some low quality panel used in this phone.
I've had this happen when on stock 7.0 and only recently. But like stated before only remedy is a restart.
I had the same issue with my moto x style.Its an hardware issue.which occures on both marshmallow and nougat.I replaced the display and it solved the problem. Only thing different in my case was, 1/3rd of bottom display had gray vertical lines.I got the display from aliexpress.

Ghost touch issue

It seems my phone has a problem of ghost touch. The status bar slides down automatically and randomly. I turned on developer mode to see what happened, it seems, some coordinates near (320, 0) are clicked very often with no reason at all. It annoys me a lot since it interrupts my normal operation. Did someone has the same problem? And how do you solve it? Thanks
I had the same issue. top right of my screen would think it was being touch when it wasnt.
Yes, my wife's ph-1 has this issue. the ghost touches liked a bunch of Instagram posts, it was hilarious seeing my wife's reaction to this, and then she had to go back and unlike a bunch of crap posts.
But this is an issue and very serious one. I believe this could be also causing battery drain if it interacts with OS and causes deep sleep not to kick in when it should. If the issue happens again I will be contacting support to get this BS sorted out.
I have this issue on the oreo beta although it will keep touching the same spot continuously for about a minute or so and if it happens while the phones locked i cant do anything till it stops luckily its been happening less and less often
I had this happen on one phone but not the others, worse when the phone got hot
i think it's the screen, if you look closely, its not flat. Mine is kinda wavey at the edges, like there's a little too much adhesive, and i think that waviness gets worse when the phone gets hot, and causes the phantom touch
glasscitysd said:
I have this issue on the oreo beta although it will keep touching the same spot continuously for about a minute or so and if it happens while the phones locked i cant do anything till it stops luckily its been happening less and less often
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It was gone for 3 days and now the problem is back today. I tried to restart in safe mode and problem is still there so it is a system issue, not caused by third party app.
Same issue here. No rhyme or reason I can see as to why
Mine was happening on my old PH-1 without the earpiece screen, but i got the new version i got has no issue.
This issue is very annoying I'm thinking of returning the device to Sprint and getting another but since it happens so random I wouldn't even be able to show them the issue. Thought it was an issue with the oreo beta but after going back to stock I still have the issue starting to regret buying this phone
I've never experienced this issue on mine
Bump. Been happening to me on Oreo beta. About once or twice a day it happens. I just lock and unlock the phone and it stops. It's weird. I think it has something to do with the screen sensitivity. It's more prone to happening when the device screen is all smudgy or if I just washed my hands.
I have the same issue too.
https://www.youtube.com/watch?v=wbHtJLQEU7o
Me too
Same issue here as well. I did the touch sensitivity trick as well and still getting it. Hope its a software issue and not a hardware one.
I haven't encountered ghost touch but encountered slow responding touch issue. Sometimes the touchscreen will respond to my command slower like 3-4 secs after i touch the screen. Every time this issue appears, a restart of my phone will clear it. Very likely software issue. I'm still on nougat, hopefully they fix it on Oreo before it goes out of beta.
My first PH-1 would become touch unresponsive for 30+ seconds all the time (it was fully updated at the time). It seemed to happen more frequently when I was typing on the stock keyboard. I eventually returned it and bought another several weeks later. I've had no issues with the new one-quite happy with it. I'm running the Beta2 update and enjoying it.
boidsonly said:
My first PH-1 would become touch unresponsive for 30+ seconds all the time (it was fully updated at the time). It seemed to happen more frequently when I was typing on the stock keyboard. I eventually returned it and bought another several weeks later. I've had no issues with the new one-quite happy with it. I'm running the Beta2 update and enjoying it.
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Click to collapse
That's good to know. Mine also happened when using the keyboard occasionally as well. I have a replacement set coming as my original set's packaging did not come with the pull tab on the box and there was a fingerprint smudge at the back of the phone when i took the phone out of the box the first time. I presumed mine was a used/returned set, not new as what i had ordered. Hope the new set fixes the issue.
My phone has the same issue whenever I'm charging it and using it at the same time it's registering multiple touches when I'm using just one finger on the screen, it mostly happen when I'm doing a long press action. In developers option I have show taps enable so I'm able to see all ghost touches.
I fixed my ghost touch issue with a simple hard reset.
It will come back sadly

Touchscreen buggy

Just this morning, out of nowhere, I started experiencing random touchscreen jumps and touches. My phone just registers random touches after a few seconds of use before completely disabling the touchscreen. This mostly happens on the bottom left but its random touches. The only way to temporarily fix it is locking and unlocking the device. I tried a soft and several hard resets which fixed the issue for a few minutes but eventually brought back the problem in an hour or two. Is this a hardware or software problem? Should I attempt to install a custom rom to fix it? My model is the US99721E.

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