Screen turns to green/matte after waking up the phone - Samsung Galaxy S9+ Questions & Answers

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.

Related

Camera problem: Yellow tint first 20 seconds

Hi,
I'm having a problem with my X10 camera, or maybe I'm missing some setting? Whenever I start the stock camera (or even other camera apps like vignette) I get a yellow tinted picture the first 20 or so seconds and this happens only indoors with low light levels. It takes the camera from 20 seconds up to 30 to adjust and sometimes more and I have to wave it around to get it exposed to lights and objects, after that the picture adjusts fom very yellowish to normal colors gradually & slowly. Tried adjusting exposure & white balance, set to 'auto', 'night', 'indoors' etc and tried all possible settings and nothing helps. After the shot is taken, the camera goes again to yellow & I have to wait again those 20-30 seconds & wave around before next shot. I know this should be rather normal with room lights but I've compared to other mobiles (not other X10s though) and none have the delay at all, only on my X10. Not even my older SE mobile does this. Is there a setting I'm missing?
Help please if anyone knows. Thank you.
I have this aswell, and always had. not sure if it can be fixed, already got used to a yellow first picture
guess that's how the camera is

Second Screen dimming

Just got the V10 and the second screen dims after 2 or 3 seconds after turning off the main screen. Is there a way to adjust the timing when the second screen dims? The dimmed second screen is almost unreadable because it is so dim.
Ditto, the idea that this is a replacement for a notification LED is really damaged by the dimming. (It's not just me that bought the phone based on that idea, right?) What I've found so far:
With the screen brightness set to 0, the second screen dims fully a few seconds after sleeping. Icons become about as noticeable as dust reflections.
With the screen brightness set to 100, the second screen follows the ambient light sensor after sleeping. Under bright light it turns itself up to the point where it's useable.
I've been playing with all the LEDs that Light Flow sees, but at least without root, nothing has any effect. I might look through the /sys files later. We probably need to get root first to figure this out.
On auto brightness it seems to be that the device adjusts the dimmed display for the ambient lighting? It's not the easiest thing in the world to see, but it's certainly not hard for me to see what notifications I have. I really prefer this over a colored LED.
Light Flow settings
For what it's worth, here's my current setup, now that the T-Mobile H901 is rooted. This does no one without root any good, and I don't know how it would translate to similar LED managers. I've been using Light Flow since the Sapphire (MyTouch 3G).
Light Flow device settings: check direct mode, root mode, and run every command as root. The Nexus 5 force reset option is checked by default and I don't know if that's relevant (no calls yet). Everything else in the menu is unchecked.
Let Light Flow control lcd-backlight-ex.
In a notification, set that "LED" to Solid and to 255 brightness. Check Enable Mixer and App controlled flash. With that last setting, the app will reset the brightness every few seconds even if the system dimmed it due to an ambient light change.
Now I need to edit some notification icons to be big and colorful. I wonder how this will impact battery life? Now the app is going to be awake all the time.
I've noticed that today on auto brightness the second screen will increase in light but not much. It also is not as smoth of a transition as on main display. It kinda jumps up real quick..
Yes for me I've noticed on Auto brightness the second screen will dim in a dark room and if you turn off your phone while in that room then come out... The second screen is still dim.... It's like th second screen doesn't respond to the light sensors at all unless the main screen is on.
Sent from my LG-H901 using XDA Free mobile app
It would have been nice if lg included the capability to change the second screen settings such a brightness or text color.
m0n0t0ne said:
It would have been nice if lg included the capability to change the second screen settings such a brightness or text color.
Click to expand...
Click to collapse
Another one of many things that it would be cool to see baked into a custom stock rom. Good stuff. I wonder if Cloudyfa might come over and cook on this awhile. I have always loved his stock Roms....
Sent from my LG-H901 using XDA Free mobile app
m0n0t0ne said:
It would have been nice if lg included the capability to change the second screen settings such a brightness or text color.
Click to expand...
Click to collapse
Color would be cool. A classic CRT bright/lime green, for instance, would probably show up much better than the white.
We need to get on their forums with these ideas. Maybe some will get squeezed into an update
An app which turns off auto dim in case screen is off would be pretty much help. Maybe I'll develop one.

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?

Screen changing color temperature on unlock? (not the brightness)

Hey guys,
just as I had settled to keep my V30 (and use Lux for autobrightness) despite banding. I found something new!
If I unlock my phone and I have some white displayed, I can see the color temperature shift (like yellowish, bluish, greenish, yellowish, greenish, ....) for like 10-20 seconds, then it settle.
I also notice that when I turn off my screen, the color change back just before the screen goes off.
It's happening on every color configuration, with auto-brightness, without, etc.
Could it be a "feature"? Is it the screen adjusting it's white balance to the outside lighting?
Thanks and regards,
Dan
Nobody has ever noticed that? Just go to google on your web browser, then close your phone, unlock directly to the google home page and check the white background. Mine shift temperature (or white balance) a couple time before "settling" to one.
Nope. Not seeing this behavior at all.
Ok I found what is causing this and I think it's normal. It's just the first phone I own that does that. Here is the culprit :
https://imgur.com/gallery/pGlIF
Even with auto brightness turned off, there seems to be a white balance adjustment (which is the first time I see). This light is making it do seizure.

Miui 10.2.2.0 OTA review

So i just got the official update today and i just updated my poco f1 to 10.2.2.0 and here's my short review. Do read this if you wanna consider to update or not.
1. The new slow mo 960fps has flickering issues so its literally impossible to use. Or is it only me?
2. Theres a new option at the top screen "Cleaner - Security scan - Deep clean - Manage apps" in recent apps screen which imo, makes it look less minimalistic and ugly.
3. Battery? So far so good. Havent tested it in pubg yet or full day use yet so i cant give my full opinion yet. I'll update this after this 3 days.
4. Theres a new options in Notification & Status bar in settings>Show icons for incoming notifications. Which basically will show your notification icons on the left status bar then after 2 seconds it goes back to showing the clock which is dumb. Why dont they just give us the options to show notification icons permanently instead of clock.
5. The hide notch option in settings is still gone.
6. Theres a new Night mode in camera, but really, they dont work as well as pixel 3 night mode. When you take a pic using night mode in completely darkness, the pic result will be completely dark, unlike the pixel 3. So dont hope too much on the night mode on miui camera.
Thats all so far my review. Will udpate this thread if i found anything new. Please share your review as well.
Hello,
regarding (1): are you in sunlight or in artificial light?
960 fps is way higher than the power line frequency (50 Hz, 60 if you are in the US) so if you shot in artificial light you are basically getting flicker from your lamp.
In direct sunlight you should have no flickering at all.
​
guanellaluigi said:
Hello,
regarding (1): are you in sunlight or in artificial light?
960 fps is way higher than the power line frequency (50 Hz, 60 if you are in the US) so if you shot in artificial light you are basically getting flicker from your lamp.
In direct sunlight you should have no flickering at all.
Click to expand...
Click to collapse
Nope. Still no difference.
I also only notice flicker in artificial light. Moreover, the flicker is much less noticeable in the actual video than it is on the screen while recording.

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