samsung s9+ screen brightness - Samsung Galaxy S9+ Questions & Answers

My s9+ screen suddenly had a lines and yellow color all over the screen and if i move the brightness bar down to 90% it get off lights.
When i play video or be under the sunlight It works fine without yellow color or lines
So i need to make the screen work all the time like i am under the sun light or like i runing a video to get the most brightness
Is that applicable with any workaround solution ?

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[Q] Horizontal White Lines

Hi, when i turn off my auto brightness and set it to low and the background is white , i can see 2 strange horizontal lines in it.
Should i send to custumer support ? or maybe its normal ?
When brightness is on medium or high it disappears.
Could be because of custon kernel or Rom ?
I take a picture tho show.
http://lh3.googleusercontent.com/-FAUqfyzaThk/T01mI8a6qAI/AAAAAAAABbI/jEnfj9cA4WM/s640/DSCF6960.JPG
I have read that AMOLED screens have several flaws that are imperceptible, an example are screens with yellow

Black displays are not completely off

Yesterday night I noticed that black pixels do not switch off completely on my phone. (as they should on AMOLED, right?)
Try it this way:
Set your screen brightness to almost a very low value.
Now look at a picture which has a black background and very little color in the middle etc. The room has to be dark, otherwise you wont see a difference. (You can also cover your had with a blanked etc., just wait a moment, so your eyes get used to the dark environment).
Hide the statusbar, navbar etc., so only your picture is shown (Tap on the picture once in Google Photos).
When you disable your lockscreen and switch the display on and off a few times you'll see that the picture vanishes first and than the display goes completely dark. It looks like a very light yellow back-light.
Another way:
Again in dark environment power off your phone. Switch it back on and watch the bootlogo. The surroundings (everything that's black) is truly black and "switched off" and than some secs before completing boot the "back-light" switches on.
I tried to find a solution for that. The only thing I found is a setting in Kernel Adiutor named "Minimum RGB value" under the screen section which is set to 35. However lowering it to 0 does not work, the value get reset to 35 every time (Higher value does not change anything either tho).
I'm running Oxygen OS 2.2.0 with bluespark kernel + root + xposed (Gravitybox + XInternalSD)
maybe the black is not that black?
edit: just tested with fullhd resolution black picture and red dot pixel in centre(PNG file, not jpg nor bmp) and everything is working as intended - black is pitchblack(same as when u just block/shutdown ur phone)
edit2: i'm not having my reflex by my side this couple of months, but you can check it making a photo in light isolated room with low shutter speed(20sec should be enough, if they really produce light)
AlexVendettA said:
maybe the black is not that black?
edit: just tested with fullhd resolution black picture and red dot pixel in centre(PNG file, not jpg nor bmp) and everything is working as intended - black is pitchblack(same as when u just block/shutdown ur phone)
edit2: i'm not having my reflex by my side this couple of months, but you can check it making a photo in light isolated room with low shutter speed(20sec should be enough, if they really produce light)
Click to expand...
Click to collapse
Thank you for testing. I reproduced your result with a #000000 PNG and everything seems fine, as long as the brightness does not go below a certain value. Turning auto brightness off and sliding the brightness completely down enables some kind of light in the whole panel.
Could it be some android feature, which put's a light overlay over the the screen image to protect the eyes in low light environments, like these warm filter mods?

Flickering screen

Does anybody have a flickering display?
I like to dim the brightness in the evening almost to the minimum. Then it is quite easy to see some "pumping" (flicker) of the brightness, when I use the phone. It seems to be even more visible, when I turn on the "night owl" app, in order to filter the blue light out of the screen.
https://play.google.com/store/apps/details?id=com.evezzon.nightowl
Any responses are welcome!
ROM: stock, 2016-04-19, no add-ons (yet)

Galaxy Tab S7 Plus green tint display issues at low brightness

https://www.reddit.com/r/GalaxyTab/comments/idqrip/s7_display_issues_at_low_brightness/
I have same problem with my Galaxy Tab S7 Plus 5G at low brightnes - with dark mode grey colour looks greeen
Very bad for such expensive device
Leave the brightness up and use a screen dimming app, if the dark overlay on the screen is fine and does not show a green tint the problem might not be the screen itself and should hopefully be solvable with a software update.
This seem to be a common problem of (Samsung) (AM)OLEDS. I had to get three Tab S5e refunded because of this green tint and other low light problems.

Screen turns to green/matte after waking up the phone

As title says. Suddenly my phone started to turn to green/matte/muted without contrast and very faint colours. Takes a while, like 4 or 5 minutes, but it goes back to normal while doing some kind of vsync (you can see how it forces the grey scale back to normal as some kind of vsync error). Some icons with pure black background appear with the proper contrast and colours (!!!) and If I switch auto brightness to off doesn't happen [UPDATE: now it's permanent] - No root, updated to last 2022 march patch.
Any solutions?
Thanks in advance!
EDIT: after 12 hours of partial use I've identified the green tint behaviour, it happens when the light sensor tries to adapt the screen brightness. If low = perfect colours, if high = perfect colours. All the in between = green tint.

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