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[Q] Brightness changes (even though auto-brightness is off)

Hi all
I am having a strange issue with my Nexus 5, so I was wondering if anyone else has experienced this:
Auto-brightness is off, brightness is set to maximum. Every now and then, as I am using the phone, the brightness would change. It would go slightly darker, and then sometimes after some time (minutes) slightly brighter again (back to maximum). When this happens, the actual brightness settings slider does not change, it's always saying 100%. I've tried to notice some pattern in the occurrences of this issue, but so far cannot identify any steps to reproduce it. It is easily spotted when the screen has a big area of a solid colour, e.g. on a web-page's white space. So most often I see it while scrolling a news website. Note that during these brightness changes, my environment's lightning does not change (auto-brightness is off anyway, so this should not matter).
I don't even know if this could be down to a software or hardware issue.
So, anyone had similar problems?
Thanks,
Nik

It's throttling (overheating)

Found a related thread
Thanks supersain08 for your answer. Now using this term, I found this thread:
http://forum.xda-developers.com/showthread.php?t=2516915

sovata said:
Thanks supersain08 for your answer. Now using this term, I found this thread:
http://forum.xda-developers.com/showthread.php?t=2516915
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How can you use the brightness at maximum on this phone? This phone has one of the brightest displays I've ever seen. At 30% or so it's brighter than most phones on full.

Synyster06Gates said:
How can you use the brightness at maximum on this phone? This phone has one of the brightest displays I've ever seen. At 30% or so it's brighter than most phones on full.
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Well I think that's beside the point, but let's say it's a personal preference.
And also it is possible that one would like to have a 100% brightness in light/sunny conditions, so then this issue could become relevant for anyone.

Last time I used 100% brightness on a phone screen was on the first days of my gnex.
Displays are in indoor situation much too bright on 100%, brigther doesn't look better all the time. I am going with Auto-Brightness (to have it at 100% in outdoor situations) but it is still to bright in low light situations. I have to wait for a customrom to adjust this like I did with the gnex.
Can not understand how people can use it at 100% all the time.

Why do you feel it's necessary to argue whether 100% brightness is useful or not?
That's not the point of the original question.

supersain08 said:
It's throttling (overheating)
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I've been having the same issue; glad to know it isn't a defect, and that it's supposed to do that. Thanks for the information

Do any custom ROMs/Kernels allow you to have full control over screen brightness?

Regardless of ambient light, is there a way to set full brightness on the S6?
Running the stock ROM/kernel, even on full britghtness, the screen can go brighter unless the light sensor detects a high ambient light. I am wondering if its possible to change this.
Currently means PWM is still active on the screen even on full brightness. Same with the note 4 but this was not the case with previous samsung devices. PWM on full brightness is a deal breaker for me so I need to know now or this phone is being sold.

I think it's not really advisable to keep the screen on "extended brightness" mode for longer periods of time, because AMOLED panels wear out over time and this would be a definite way to make it wear out faster. Also it generates a lot of heat. There's a reason why Samsung implemented this adaptive mechanism.

mindfever91 said:
I think it's not really advisable to keep the screen on "extended brightness" mode for longer periods of time, because AMOLED panels wear out over time and this would be a definite way to make it wear out faster. Also it generates a lot of heat. There's a reason why Samsung implemented this adaptive mechanism.
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Thankyou for replying but you did not answer the question at all. I specifically stated this is a deal breaker for me, and that it means that I have to sell this $1000 phone for great effort at a reduced price because of it.
If something is this important to me then I clearly do not care about wearing it out over time. My galaxy s1+s2 has been running on modified AMOLED gamma values for 6 years and they are still fine so I dont care if the displays wears out in 10 years time.
I cannot use the phone becuase the PWM effect means the screen flickers like crazy. It gives me a headache after 1 minute of use. The phone is worthless to me in this state. If i can increase the brightness to full hopefuly the PWM effect stops and I can use a screen filter to lower the brightness, so it will not wear our the display as well.
Lastly why was this moved to Help and Troubleshooting, it is a very important question about the phone. All previous SGS phones have been fine, this is a game changer for the worst.

Yuge said:
Thankyou for replying but you did not answer the question at all. I specifically stated this is a deal breaker for me, and that it means that I have to sell this $1000 phone for great effort at a reduced price because of it.
If something is this important to me then I clearly do not care about wearing it out over time. My galaxy s1+s2 has been running on modified AMOLED gamma values for 6 years and they are still fine so I dont care if the displays wears out in 10 years time.
I cannot use the phone becuase the PWM effect means the screen flickers like crazy. It gives me a headache after 1 minute of use. The phone is worthless to me in this state. If i can increase the brightness to full hopefuly the PWM effect stops and I can use a screen filter to lower the brightness, so it will not wear our the display as well.
Lastly why was this moved to Help and Troubleshooting, it is a very important question about the phone. All previous SGS phones have been fine, this is a game changer for the worst.
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Not really sure where the issue is at, are you stating that when the brightness is reduced you can visibly see the phone flicker? I use an app called Velis Auto Brightness, it gives you way more customization to the brightness level. I like it because it mathematically calculates based off the luminescence (in the environment) of how bright the display should be to show accurate color perception, rather than focusing on batter life as much.
The extra brightness mode on the phone is just a high contrast feature, I haven't found a way to force it on as of yet. I know the phone goes up to 700 nits in sunlight, but the biggest difference is the contrast feature on it.

Brittany_Menton said:
Not really sure where the issue is at, are you stating that when the brightness is reduced you can visibly see the phone flicker? I use an app called Velis Auto Brightness, it gives you way more customization to the brightness level. I like it because it mathematically calculates based off the luminescence (in the environment) of how bright the display should be to show accurate color perception, rather than focusing on batter life as much.
The extra brightness mode on the phone is just a high contrast feature, I haven't found a way to force it on as of yet. I know the phone goes up to 700 nits in sunlight, but the biggest difference is the contrast feature on it.
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I can see the phone flicker even when the brightness is on max setting, because it is not truly the the max brightness of the screen hardware. All the galaxy phones after the s2 did this, except when you turned them to max they stopped flickering. The s6 is the first device that does not allow you manual control over brightness, so I just want to know if custom roms have done this.
IF you don't know what I mean this is how they flicker.
https://www.youtube.com/watch?v=D2f0TZtpRA4
Also you are wrong that the extra brightness is just contrast, it increase the lumens as well as reduces or stops the flicker PWM effect. This is how phones using PWM reduce brightness, by making the screen flicker on and off, whereas in phones like the S2 the actual display dimmed. Some people can see this and are sensitive to it, some people are sensitive to to it but they don't know it, and some people dont see it and aren't affected by it.
But it doesn't look like anyone has made a Kernel that allows for full control over the AMOLED in the S6 so I plan on selling the phone soon.
Lastly I hope someone moves this to a more appropriate section where a DEV can see it, not the basic QA section like how do i change wallpaper.

Yuge said:
I can see the phone flicker even when the brightness is on max setting, because it is not truly the the max brightness of the screen hardware. All the galaxy phones after the s2 did this, except when you turned them to max they stopped flickering. The s6 is the first device that does not allow you manual control over brightness, so I just want to know if custom roms have done this.
IF you don't know what I mean this is how they flicker.
https://www.youtube.com/watch?v=D2f0TZtpRA4
Also you are wrong that the extra brightness is just contrast, it increase the lumens as well as reduces or stops the flicker PWM effect. This is how phones using PWM reduce brightness, by making the screen flicker on and off, whereas in phones like the S2 the actual display dimmed. Some people can see this and are sensitive to it, some people are sensitive to to it but they don't know it, and some people dont see it and aren't affected by it.
But it doesn't look like anyone has made a Kernel that allows for full control over the AMOLED in the S6 so I plan on selling the phone soon.
Lastly I hope someone moves this to a more appropriate section where a DEV can see it, not the basic QA section like how do i change wallpaper.
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Click to collapse
I really don't see the problem. All of the phones today flicker, that's how they show images on the screen. You're not going to find custom roms on this device because AOSP is not working on the phone yet, so if its a deal breaker go ahead and return it and get a new phone.

Yuge said:
I can see the phone flicker even when the brightness is on max setting, because it is not truly the the max brightness of the screen hardware. All the galaxy phones after the s2 did this, except when you turned them to max they stopped flickering. The s6 is the first device that does not allow you manual control over brightness, so I just want to know if custom roms have done this.
IF you don't know what I mean this is how they flicker.
https://www.youtube.com/watch?v=D2f0TZtpRA4
Also you are wrong that the extra brightness is just contrast, it increase the lumens as well as reduces or stops the flicker PWM effect. This is how phones using PWM reduce brightness, by making the screen flicker on and off, whereas in phones like the S2 the actual display dimmed. Some people can see this and are sensitive to it, some people are sensitive to to it but they don't know it, and some people dont see it and aren't affected by it.
But it doesn't look like anyone has made a Kernel that allows for full control over the AMOLED in the S6 so I plan on selling the phone soon.
Lastly I hope someone moves this to a more appropriate section where a DEV can see it, not the basic QA section like how do i change wallpaper.
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Click to collapse
Questions do not belong into Development. It will be clear once you read the respective section rules.. I'm afraid that you'll have to live with the thread in Q&A

Adaptive Brightness

I think I've gotten too used to this feature on my old Note 4 with CyanogenMod, because I really miss it on my V20.
I just got the phone today, and so far, I really enjoy using it. But I'm having trouble with the lack of adaptive brightness. I like to have my phone screen dark (dark themes, low brightness, etc), battery saving or not. With adaptive brightness, I could set the brightness slider pretty low, and still have automatic adjustments; the screen would just be darker in brighter light than it would be on a higher setting.
It looks like LG got rid of this and put the old auto brightness back. I know most people prefer this, but I do not. The screen is just too bright for me. Is there any way to get adaptive brightness on here, preferably without root?
H918 (TMO)

Check out this thread for some ideas.
http://forum.xda-developers.com/v20/help/auto-brightness-t3490880

pbelcomp said:
Check out this thread for some ideas.
http://forum.xda-developers.com/v20/help/auto-brightness-t3490880
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It looks like Lux is the only option. I've used it before and never really enjoyed it. I installed it anyway but brightness is really jumpy. I guess I have to hope T-Mobile adds it back in.

Zacharee1 said:
It looks like Lux is the only option. I've used it before and never really enjoyed it. I installed it anyway but brightness is really jumpy. I guess I have to hope T-Mobile adds it back in.
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You need to adjust the settings. You can tell the app how quickly/slowly to ramp up/down the brightness. How much of a change in brightness is required before the change is actually made (so the screen isn't jumping around by 1% every time you move it in your hand). You can set brightness levels for certain ambient light levels, all to your choosing. It takes a little bit of time to dial it in, but it's far better than the garbage auto-brightness LG uses. I too miss the built-in adaptive brightness.

can this app burn in the screen?(galaxy s6)

hello,
I downloaded the always on amoled beta app from play store
cuz I don't have the official samsing's always on,
but I wondered if it can cause screen burn in?
I am new here so move my thread if it is not the right forum,thank

Hi, I think if you just make sure that app change position of clock at certain amount of time, that should be in settings. You should be good. Battery is another problem.

IMO this should go to Q&A section.
S6 has an AMOLED panel which is capable of performing always on functions.
but it is too battery intensive for the S6 to handle it and so Samsung wont officially support it.
it should not harm your screen in any way, but do notice your battery life.

Question Increase max screen brightness?

Is there any way I can set screen brightness above its maximum capacity?
It is no news that this phone doesn't have such a bright screen as it features an LCD display. But sometimes this gets even more annoying specially when it comes to gaming. That said, I've been wondering if we could increase brightness level beyond what it is. Maybe a feature on a custom ROM or kernel if possible (?)
I've also read somewhere that Android doesn't let you set actual max brightness by yourself on manual mode so it'll go into its maximum capacity only on auto/adaptive brightness mode. If this is true, could we trick on that somehow?

henriquehd97 said:
Is there any way I can set screen brightness above its maximum capacity?
It is no news that this phone doesn't have such a bright screen as it features an LCD display. But sometimes this gets even more annoying specially when it comes to gaming. That said, I've been wondering if we could increase brightness level beyond what it is. Maybe a feature on a custom ROM or kernel if possible (?)
I've also read somewhere that Android doesn't let you set actual max brightness by yourself on manual mode so it'll go into its maximum capacity only on auto/adaptive brightness mode. If this is true, could we trick on that somehow?
Click to expand...
Click to collapse
No you cant increase it , if you probably do it will damage the screen , LCD has 450nits on manual and somewhere 550 nits on Auto(MAX),i didnt see any room with the feature of increasing to 550 in manual ,only auto works .

Everyone says the brightness is not really sufficient, but on my X3 Pro 8/256 max brightness is really bright/strong. Just got the phone a week ago. Is it possible they changed display panel in the manufacturing process?

Areasu said:
Everyone says the brightness is not really sufficient, but on my X3 Pro 8/256 max brightness is really bright/strong. Just got the phone a week ago. Is it possible they changed display panel in the manufacturing process?
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Maybe, or it could be just a matter of perception. I've also wondered if it's possible to replace the original display for a brighter one but I think that would implicate other physical parameters such as voltage and current.

Antonio7489 said:
No you cant increase it , if you probably do it will damage the screen , LCD has 450nits on manual and somewhere 550 nits on Auto(MAX),i didnt see any room with the feature of increasing to 550 in manual ,only auto works .
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Actually I've found a way to do it. Derpfest ROM has a feature named "high brightness mode" or "HBM". It does increase brightness above the max level. It makes a slight difference but yet perceptible. I think it needs kernel support to work also.

henriquehd97 said:
Actually I've found a way to do it. Derpfest ROM has a feature named "high brightness mode" or "HBM". It does increase brightness above the max level. It makes a slight difference but yet perceptible. I think it needs kernel support to work also.
Click to expand...
Click to collapse
You can do it on any rom which doesn't support hbm by default using root and changing the kernel but it will properly have some bugs.

su -c "echo 4095 > /sys/class/backlight/panel0-backlight/brightness"
Simple!