[Q] [HELP] SGS4 brightness messed up! Too bright or too dim - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

Today after ending a call, I was about to leave my house when I my phone wasn't responding. The screen was dark but the keys were lighting up, so I didn't pay much attention and pulled the battery out. After rebooting, I learned that my brightness calibration is wayyy off!! It is very dim or super bright (that my screen is a bright reddish orange yellow). I tried a few screen brightness calibrator apps and learned that from 0 to 199 the value of brightness (lux) remains the same - super dim!!. The moment i put the brigthness at 200 and upwards until 255, the phone becomes super bright!!
I did a factory reset and flashed the stock ROM via Odin. Still no change. Any assistance on apps, mods or anything I could try before returning the phone to AT&T?? Thanks in advance!

Seems like you've done anything you could do to be honest with you
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2

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Auto brightness only brightens, never dims

I noticed that the brightness only brightens but never dims back in automatic brightness display setting. I can reproduce this easy with turning the lamp on my desk on and off. It only goes back to the lower brightness if turning the screen off and on again.
Noticed this too but seems to only occur when I use a widget to toggle between Auto and 100%.
If I leave the setting in Auto from within settings then it seems to work. Brightness widgets seem to break the auto functionality.
Hmm, I don't use a brightness widget. The light of the softbuttons go on if I cover the light sensor, but the screens stays in high brightness.
Strahlenkanone said:
Hmm, I don't use a brightness widget. The light of the softbuttons go on if I cover the light sensor, but the screens stays in high brightness.
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Must be an all around bug then. If you turn the Atrix off and back on then the auto brightness functionality is restored.
Strahlenkanone said:
I noticed that the brightness only brightens but never dims back in automatic brightness display setting. I can reproduce this easy with turning the lamp on my desk on and off. It only goes back to the lower brightness if turning the screen off and on again.
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Click to collapse
This must be an Android thing. My Atrix does the same thing, as did the Nexus One I had before. I've had several (high end) Nokia's that dimmed/brightened perfectly. After 5 seconds, they would brighten (or dim) accordingly. I was hoping Motorola was better at making phones than HTC (the KING of bad battery life). We ALL lose here. Our precious battery life is being drained by the poor execution of a simple function.
This is a stock android thing (problem). Custom ROMs can allow it to dim and change brightness smoothly rather than in discrete steps (Cyanogen).
That's what I thought. I found this free app called "esdimmer". It supposed to be for Galaxy phones, but it's somewhat working on my Atrix. Does this function work any better in Gingerbread?
Sent from my MB860 using XDA App
Well it's good to hear that it's a stock android problem and not the actual phone. I did find a way to get around this problem but it's very limited. You can get the screen to dim by first putting the phone into standby and then press the standby button once again (which gets you into the lock screen). You'll notice that the screen then dims (if coming from a well lit area/room to a darker one).

Screen Brightness always low

Hello,
just got the white galaxy s2 and I'm not quite happy with screen brightness.
Though I can make it extremely bright in manual mode, the auto brightness is always too low. Sometimes it goes to dim mode and does not return back to normal even on bright lite from lamp.
already tried several roms not luck. is this a sensor issue or default levels on device?
-Sergey

Camera DIM after snapping

Hi,
Since I have received by S4 new 3 weeks ago, I notice that when I take a picture, it appears bright at some points while it is capturing the picture, but afterwards, the picture is usually dimmer. I also notice that when there is a lot of light coming into a room, like from a window, it will cancel out the light so much, that the picture is completely dark.
Anyone have this problem? I am on stock, but rooted, UCUAMDL.
Make sure you have auto-dim and power save turned off on your phone settings. I'm assuming it's brightening the screen to allow you to acquire your photo subject and then dimming the screen to conserve power. I normally leave the brightness adjustment in my task bar so I can adjust as necessary.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Yes, that is what it was. I just noticed that this morning, and was coming here to update the thread. It does still cancel out bright areas like a window of sunlight, but maybe I can fix that with the exposure options.

Does your Screen turn pink-ish at lowest brightness (adaptive screen ON/OFF)

So mine turns pink/reddish when setting the lowest brightness setting (ambient display on) - you have to be in a pitch black or very dark room.
When its off, it still does it but its not that bad.
EDIT: If yours does turn pink, will you RMA?
Mine does this as well. I rarely ever see the brightness go that low so it doesn't bother me that much. However what does bother me, is at 50% brightness unless i am looking at the screen dead center the screen has a redish, bluish, or greenish hue on it. Was very yellow the first day I had it, but the yellowish hue is gone.
I have adaptive on. Last night I set my brightness all of the way down. For the first time I saw a slight pink hue. Increasing the brightness fixed this. I am not sure if turning off ambient would have fixed it. If I see it again I'll try turning it off.
I thought was a known feature of amoled. I'm guessing they will all do it at low brightness.
Mine actually got worse. When I first noticed it, it was acceptable. Now its almost reddish already. Some people say its actually a feature of AMOLED. However, when I tried it on a different AMOLED Screen, Note 3 and 4 - i didnt see it.
No, I tried with adaptive brightness on and off and can find no color changes except maybe a slight blue hue when tilting the device and then almost rainbow effect at close to 180 degrees. Guess I got a good screen.

Nightclick & LCD vs AMOLED

Last night, I went to use my night clock app with my new LG v20. On my Note 7, the screen was totally 100% black except for the numbers.
On the v20, the entire screen was stil lit - faint, but clearly still lit up in a light light grey.
Is this just how an LCD screen works, or is there something I have to do in order to get the rest of the screen to go off.
(Note, this includes the 2nd screen which was also lit - and I had the brightness at 0%).
--
BTW, this may need to be a separate thread - on my phone I notice that the auto-brightness tends to be too dark. Any way I can adjust it to be brighter when in auto mode, or should I just go to manual ?
polstein said:
Last night, I went to use my night clock app with my new LG v20. On my Note 7, the screen was totally 100% black except for the numbers.
On the v20, the entire screen was stil lit - faint, but clearly still lit up in a light light grey.
Is this just how an LCD screen works, or is there something I have to do in order to get the rest of the screen to go off.
(Note, this includes the 2nd screen which was also lit - and I had the brightness at 0%).
--
BTW, this may need to be a separate thread - on my phone I notice that the auto-brightness tends to be too dark. Any way I can adjust it to be brighter when in auto mode, or should I just go to manual ?
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Click to collapse
Try turning off second screen and see what your results are.. Second screen has a seperate black light that slightly bleeds out to the rest of the screen. It was horrible on the V10 but much improved on the 20..
Swizzle82 said:
Try turning off second screen and see what your results are.. Second screen has a separate black light that slightly bleeds out to the rest of the screen. It was horrible on the V10 but much improved on the 20..
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Click to collapse
The night clock app has the option to turn off the notification, which also turns off the 2nd screen.
...oops. It did, until I followed your suggestion in the other thread about the more setting to enable time/date when in full screen or notification bar hidden. I'll have to get into the habit of turning *off* the more setting at night.
(Either way, doesn't help with the slight gray background color. I can probably just get used to it as long as I'm not damaging the screen by having it slightly on all night. I need to google if LCD screens have burn in problems I guess.)
--
Maybe I should just start pm'ing you all my questions
polstein said:
Last night, I went to use my night clock app with my new LG v20. On my Note 7, the screen was totally 100% black except for the numbers.
On the v20, the entire screen was stil lit - faint, but clearly still lit up in a light light grey.
Is this just how an LCD screen works, or is there something I have to do in order to get the rest of the screen to go off.
(Note, this includes the 2nd screen which was also lit - and I had the brightness at 0%).
--
BTW, this may need to be a separate thread - on my phone I notice that the auto-brightness tends to be too dark. Any way I can adjust it to be brighter when in auto mode, or should I just go to manual ?
Click to expand...
Click to collapse
I use this on all my phones since I feel stock auto is too dim. https://play.google.com/store/apps/details?id=com.velis.auto.brightness
polstein said:
The night clock app has the option to turn off the notification, which also turns off the 2nd screen.
...oops. It did, until I followed your suggestion in the other thread about the more setting to enable time/date when in full screen or notification bar hidden. I'll have to get into the habit of turning *off* the more setting at night.
(Either way, doesn't help with the slight gray background color. I can probably just get used to it as long as I'm not damaging the screen by having it slightly on all night. I need to google if LCD screens have burn in problems I guess.)
--
Maybe I should just start pm'ing you all my questions
Click to expand...
Click to collapse
Sent from my LG-H830 using Tapatalk
Use comfort view on low or medium. Will help lower the ~9000K color temp some and help blacks a hair. Faint glow is typical on LCDs. Higher quality LCDs and higher quality led's can help. Lg skimped here. Sucks they didn't even give us color modes to pick from. The colors are waaay off. But using comfort view dims the blue pixels and helps considerably.
polstein said:
On the v20, the entire screen was stil lit - faint, but clearly still lit up in a light light grey.
Is this just how an LCD screen works, or is there something I have to do in order to get the rest of the screen to go off.
Click to expand...
Click to collapse
That's just how LCD works, they need CCFL or LED back light to lit up the screen, it's not possible for it to be completely black while turned on. With AMOLED the individual pixels can turn off itself which is why the black are blacker on them. OLED screens also have very high refresh rates which eliminates flickering, this is good for people who are concerned with eyes health.
Lcd doesn't get burn in, but it can get ghost image retention. It was f***ing horrible by the end of my V10 usage.. Never had the problem on the G2 3 or 4. Just the V10, even after factory resetting.
Swizzle82 said:
Lcd doesn't get burn in, but it can get ghost image retention. It was f***ing horrible by the end of my V10 usage.. Never had the problem on the G2 3 or 4. Just the V10, even after factory resetting.
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Click to collapse
Had the same issue my V10, that is my biggest V20 concern. . My v10 was not even a year old.
I get the engineering and cost reasoning, but not sure I like the lcd screens.

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