Telephone is turning screen backlight off when under sun - Redmi Note 9S / Note 9 Pro (Indian Model) Question

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.

Related

[Q] Keep app running with screen off

Ok, I have a voice changer app that I want to use with the screen off. Ideally I'd start the app, turn on real-time processing, then turn the screen off. Currently, it only runs when the screen is on, as soon as I turn the screen off the app stops all voice processing. Screen needs to be off so the battery will last longer, and so the settings can't be changed accidentally (so touch has to be disabled as well).
I either need the app to keep running in the background, or have the screen turn off but not actually locked (I dunno the right term, but if the screen was off and didn't accept touch input, but the phone thought the screen was on...that'd be fine).
Closest I've found is to edit the AndroidManifest.xml file to set it persistent, then make it a system app. This will take me a while to figure out, and not even sure it'll work.
Is there some simple solution I'm overlooking? I've seen an app that turns off the screen with help from the proximity sensor...but I want the screen off whether it's in my pocket or lying on top of a table.
Edit: I tried some apps that use the proximity sensor to turn off the screen; as soon as the screen goes off, the voice changer app just stops. I have no idea what's triggering it (if the phone is actually entering a sleep state, or if the app is specifically watching for the screen to go off and suspends itself). Thought that might be a workaround, but nope.

My phone don't vibrate

My phone is rooted and everything was ok, I must mention that phone was never droped or something..
Haptic is ON, power saving is OFF and vibration is not working.. does anyone have a clue what could be?
I search here over the forum, but I didn't find any solution..
Last option is service, but I need reset phone tu original software (is there any simple tutorial?)
thx
Not sure if it's the case of your ROM, but check if you don't have any software that turns screen off e.g. with proximity sensor.
I noticed on stock rom vibration stops when screen goes off. I had to enable the phone to manage screen off/on during calls (and the screen generally stays on at the "answer" screen") as I'm using ProximityScreenOff.
the issue was vibrating motor, not software, they replace it in service

[Q] Problem when my phone is recovering from Sleep mode

Hi everyone !
I'm new here (and not a native english speaker, so apologies in advance for any grammar mistakes)
Before making this thread, I looked for info here, but I'm not sure for what to search.
I'll try to explain my problem here.
I bought a Galaxy SIII from my provider 3 weeks ago and everything looked fine, till last week.
Some times to time, with no apparent reason or cause, while my phone is on sleep mode, on my desk, or in my pocket, playing music, I have the following problem: when I push the on/off button to wake up my phone, my screen is turning on, taking me to the lock screen.
But, my screen brightness is very low, like set to the minimum.
And when I draw my unlocking pattern, screen goes black.
Bottom buttons are lit and my phone seems to be OK, I can feel haptic feedbacks.
But the screen is black.
If I push the on/off button again, screen stays black and bottom buttons are not lit anymore, as a usual Sleep Mode.
If I push on/off again (depending on how much I wait between 2 on/off):
- My phone awakes from Sleep and takes me again to the unlock screen, brightness still very low. And after the unlocking pattern traced, black screen again
- If I didn't wait enought after putting it into sleep mode, in this case, I don't have to redraw the unlocking pattern. I'm back to my home screen...
for 1/4 of a second, stilll with brightness at the minimum. And screen goes black.
And after a serie on onoffonoff, boom, my screen is back to full and normal brightness and everything is OK.
At the beginning, my phone did that once in a while. I thought at the time ti was after pushing the on/off button while using a CPU/RAM hungry app, my phone struggling to recover....
But now, it's totally random.
Depending on .... I don't know what, I have to do the onoffonoff thing 2, 5, 10, 50 times in a row so my phone can recover from is half comatose.
Yesterday, I could not use my phone for half an hour ...
and if someone calls me, I hear the ringtone, but screen stays black.
I can answer the call (but not knowing who's calling) by sliding on the part of the screen where the slider normally is.
Funny thing is about removing the battery. It doesn't solve my problem.
When I do so, my phone boots, I see the "Samsung Galaxy SIII" boot screen, on low brightness (whih is not normal ...)
After that, I normally have another boot screen with my provider's logo and tone. But screen goes black again (but I still here the tone)
Then I realized it started to happen when my phone proposed me a Samsung update.
I tried to reset my phone to factory settings but it didn't work, the update was still here.
For a while I thought my problem was solved, because my phone behaved normally for 3 or 4 hours, without problem.
But it came back.
I found on the internet several "almost-same-problems" without proposed solutions.
Like checking if the proximity sensor was blocked by a protective transparent plastic sheet, or a case.
I tried to to remove mine.
Didn't work.
Some people said it was linked to their phone trying to acquire a wifi network.
My wifi on or off, withiin or without the range of a wifi router didn't work ...
I tried to note things down about what I did, when, how, app launched before the problem appears.
I checked battery info (temp, voltage, etc).
No pattern emerged.
So.
Hs anyone of you enountered the same problem ?
Do you have ideas, solutions I can use ?
Or maybe a voodoo prayer ?
I could sent it back to my provider which will bounce it back to Samsung. But it will take ages (3 to 4 weeks ...) :'(
Thanks in advance !
do a factory reset, go completely stock
if that doesn't help, send it in
Glebun said:
do a factory reset, go completely stock
if that doesn't help, send it in
Click to expand...
Click to collapse
That's what I did.
I tried by going into the Parameters menu, and reseting.
I tried by booting my phone with Vol+ / Home / Power buttons to access a console mode and do a wipe data/reset.
The problem is that my phone got an update like one week ago from a 4.?.? to 4.1.2.
And even with a reset, my phone reboot with the 4.1.2 version, which seems to cause this problem.
Or maybe not, but I can't be sure.
As I said, after a factory reset I did yesterday, everything went well for 3 or 4 hours and the problem reappeared.
send it to the service

[Q] Display shaking and dead

Hello people,
I flash the ROM "CM 10.1 (Android 4.2) for Atrix" with the new kernel today and at the beginning everything worked fine.
But after a few minutes setting up the phone, the screen started shaking a moment until the display turn off (turn off but the phone is still working as if the touch also responds and physical keys are lit). When locking and unlocking the phone, the screen returns to normal.
I realized that the longer I leave it off, the longer it takes to give this bug, after turn on the screen again.
The brightness is at maximum and the phone is not too hot.
At least the phone stopped rebooting but play or do anything else is impossible (I can only make calls) because of this bug.
Any idea why this is happening?

Strange screen behavior

Hello,
Yesterday I have unlocked my phone with my finger print (like I always do) and it took about 5-6 seconds for the screen to show something. The backlight turned on rather quickly but the screen remained black. After the screen turned on, it had a bad case of screen retention, the colors were also darker and I could not use the buttons from the bottom of the screen. A reboot solved all this problems.
Also, sometimes when I turn on the screen, it quickly goes dark and the slowly comes back to the initial state. During this time I cannot use the touch screen. It is like it does the wake up of the screen all over again.
I think this is a software issue (I have V20C on H850) and it might be related to the always on display. Also, all of these problems happened when I woke my phone using only the finger print (not pressing the button or knocking on the screen).
Did anything like this happen to you?

Categories

Resources