Sudden switch off - Sony Xperia P, U, Sola, Go

Plzz help. Phone automatically switched off while in normal use e.g. once changing whatsapp dp, listening music, playing a mini game, making a call etc.
The screen fades and gets black, a coloured dot appears on the black screen and phone switches off (all this happens within fraction of second). Neither the battery was low nor was the ram too buzy. M using MIUI 4.1.2 by evildev and around 7 basic apps installed.
Plzz help whats the problem in- rom, hardware or something else???

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Pixelating problems on games

A bit ago I was playing NOVA 3 and I've noticed that some sort of white layer fills the screen when I'm playing, and that's causing pixelating problems. So I tested on every other game I have on my phone, and all of them shows the same problem. The issue can be identified by a bit opaque bar on the left side (when you're playing landscape) of the screen, near the samsung logo. I'm using Simplistic Rom V, but noticed it on original ICS ROM. I tried to take a screen shot but I wasn't able to see on my pc screen, so no deal.
Can anyone help me please?

[Q] Why the phone freezes when trying to unlock?

I've been experiencing for some time now some random freezes when trying to face-unlock the phone. When pushing the power button to wake the phone, it displays the unlock screen but the box in the screen where your face (or whatever the front camera catches) blacks out, while the rest of the screen is normal (I can see the clock, the notification bar and the emergency call), also the leds for back and menu light up. And the phone justs stays like that, all the leds lighted up and the screen on. The home button doesn't work and the power button only works if I hold it down (it powers down / restarts the phone).
This has happened to my phone from some time ago, its purely random and it always happens when I try to unlock the phone. I haven't had any issues while using the phone nor strange bootloops or sudden reboots. I'm currently on stock XXEMB5 with Speedmod Kernel k2-13 and some apps removed, mainly yahoo widgets and some Samsung apps (I think I just removed all the hubs: game hub, social hub, etc...).
I red the bad eMMs symptoms, but it doesn't seem to be the same. If I had to guess, I would say its something with the camera, but right now I don't know for sure... Anyone has any idea where could be the problem?
Favourite culprit would be a non-standard kernel, wipe the phone and return to fully stock to test.
Your collection of mods and custom changes to rom are probably unique, if it doesn't freeze when stock then add changes one at a time until it happens again.

Auto screen locking Problem

I am using Lenovo Vibe C a2020a40.I am facing this problem from The very beginning ..My phone gets automatically Screen locked....While i am using or playing game it gets screenlocked automatically.After auto screenlock its shows Black screen and neither Power or volume button works that time...It happens continuesly . After some time It comes out from black screen and unlocking the pattern lock......again it gets locked .... IT MOSTLY HAPPES WHEN I AM PLAYING GAMES ... So whats the solution of this problem !? Is it because of Software !?

back screen sometimes not responding to touch

Hi all,
I have the phone for a couple of days and I have noticed a strange thing. My second screen sometimes becomes unresponsive to touch although it works perfectly fine otherwise. (i.e. when i enter the camera app on the main screen and switch to back it opens the camera on the small screen but it doesn't respond to touch). I have noticed that it happens after opening some heavy duty apps like games, but if I don't open a game it works normal all the time. When i restart the phone it works normally again until i open a game. Weird.
I have the Flyme 6.1.3.0G build which is up to date and I have installed google play and other google apps.
If you have some advice pls help.
sometimes for me too if I tap twice on it for the display to appear it's not enough for it to turn on, I'm sorry for not having more answers
Is it possible to turn on 2nd display always on?Double tap is always needed?I am going to buy this phone.I want to know more.

Telephone is turning screen backlight off when under sun

I have a Xiaomi Redmi Note 9S which has the following behaviour: it works normally until the moment it goes under the sun, then (apparently only) the backlight of the screen is turned off and never turns on again until I restart the smartphone, where it works normally until the very moment it "detects" a bright light like under the sun, then the screen goes black. When this happens, sometimes you can still see the shape of what was on screen, but most times it only goes totally black.
When the screen is black, the telephone keeps working normally (music keeps being played, receives calls, vibration responses keep working, etc...(confirmed it using scrcpy and all is working normally)), only that the backlight is turned off and it keeps totally black. During the night, i.e. with artificial light, the telephone works normally (I was able to replicate the error using a strong flashlight above the telephone, the screen also went black the very moment I turned it on).
What I tried to resolve: restarted many times, disabled every auto brightness (also one that I think is a Xiaomi MIUI only, sunlight detector, something like this) settings that are in the configuration menu, restarted using vol up + power button. Factory reseted the smartphone. Disabled pocket mode before and after factory reset.
Any idea how to proceed? What is killing me is that it seem to be a software issue, like, why the screen don't turn on back after a while, but every time you restart it, or why the phone works all night long (i.e. there no strong light on it)?
How to capture the telephone log (logcat perhaps?) and be sure of what is the exact event that is disabling screen? Maybe I can manipulate it to prevent from happening, or to make screen goes back to normal after a while, as I work as a software developer.

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