Why Does a Blue Light Flash in the Corner of the S Edge When I Turn It Over

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- #1
- This light appears few seconds after I opened a game that is on landscape mode which hides the navigation bar. The light will flow surrounding the navigation bar area for around 2 times then it will disappear completely.
- It only appears once on every restart, so if I open the same game later, it won't show until I restart my phone and open the game again.
- I've tried to see if it comes in other app so I tried on Whatsapp and Firefox browser on landscape mode but the light didn't show up at all
- I'm concerned with the battery this light consumes so I also checked what's running my battery life but I didn't find any unusual app running or hard-consuming my battery
Does anyone have any idea what this light is? or anyone else having this problem? What I want to know is where this light is coming from and is there any way to turn it off? because I really don't like unnecessary app consumes by battery...
I have attached a screenshot about how it looks like, any kind of help would be appreciated.. thanks in advance
SOLVED:
Thanks to chirogan that mentioned this is actually coming from the Game Booster feature
Do you want to disable it?
While playing a game, make the navigation bar appear and youll see a game booster icon in the lower left corner. Click on it and youll see monitoring temperature and memory icon. Click on it. Then click on Auto Control and disable it. Youll notice that the blue light will be gone because it doesnt optimize your apps anymore.

- #2
this might be a weird problem or question, but I have this random blue light flashing slowly over navigation bar when I'm on a game in landscape screen, such as Heir of Light or Mobile Legend. I use the hidden navigation bar type instead the one that taking extra space. I wonder if it's coming from 3rd party AoD I used before, such as Notification Light or Always on Edge, but I have them both uninstalled already, I wonder if it's coming from them because previously I never saw this blue light over my navigation bar. I noticed several things about this light:
- This light appears few seconds after I opened a game that is on landscape mode which hides the navigation bar. The light will flow surrounding the navigation bar area for around 2 times then it will disappear completely.
- It only appears once on every restart, so if I open the same game later, it won't show until I restart my phone and open the game again.
- I've tried to see if it comes in other app so I tried on Whatsapp and Firefox browser on landscape mode but the light didn't show up at all
- I'm concerned with the battery this light consumes so I also checked what's running my battery life but I didn't find any unusual app running or hard-consuming my battery
Does anyone have any idea what this light is? or anyone else having this problem? What I want to know is where this light is coming from and is there any way to turn it off? because I really don't like unnecessary app consumes by battery...![]()
I have attached a screenshot about how it looks like, any kind of help would be appreciated.. thanks in advance
look like a firmware bug, the issue isn't there on lineage os or customs roms like aosp extended and havoc...

- #5

- #8
Are you using any of those GoodLock apps? If I am not wrong there was something like this in one of those apps.
I am using some of GoodLock apps I got from https://forum.xda-developers.com/galaxy-a70/themes/appssamsung-goodlock-2019-pie-apps-t3958121 , but not all of them. only these:
LockStar - for Lockscreen style
NiceShot - for Screen recording
QuickStar - for Status bar and Notification style
ClockFace - for custom clock on lockscreen
I also got One Hand Operation+ but it's from Galaxy Store. I could understand if I have some GoodLock apps for navigation bar, but I didnt install NavStar or any 3rd party app for navigation bar since I dont use the "button" style at all because it's taking more space of my screen

- #9
I am using some of GoodLock apps I got from https://forum.xda-developers.com/galaxy-a70/themes/appssamsung-goodlock-2019-pie-apps-t3958121 , but not all of them. only these:LockStar - for Lockscreen style
NiceShot - for Screen recording
QuickStar - for Status bar and Notification style
ClockFace - for custom clock on lockscreenI also got One Hand Operation+ but it's from Galaxy Store. I could understand if I have some GoodLock apps for navigation bar, but I didnt install NavStar or any 3rd party app for navigation bar since I dont use the "button" style at all because it's taking more space of my screen
Can you try to disable or uninstall One Hand Operation+ to be sure? I think it causes it.
- #10
this might be a weird problem or question, but I have this random blue light flashing slowly over navigation bar when I'm on a game in landscape screen, such as Heir of Light or Mobile Legend. I use the hidden navigation bar type instead the one that taking extra space. I wonder if it's coming from 3rd party AoD I used before, such as Notification Light or Always on Edge, but I have them both uninstalled already, I wonder if it's coming from them because previously I never saw this blue light over my navigation bar. I noticed several things about this light:
This light appears few seconds after I opened a game that is on landscape mode which hides the navigation bar. The light will flow surrounding the navigation bar area for around 2 times then it will disappear completely.
I've tried to see if it comes in other app so I tried on Whatsapp and Firefox browser on landscape mode but the light didn't show up at all
I'm concerned with the battery this light consumes so I also checked what's running my battery life but I didn't find any unusual app running or hard-consuming my batteryDoes anyone have any idea what this light is? or anyone else having this problem? What I want to know is where this light is coming from and is there any way to turn it off? because I really don't like unnecessary app consumes by battery...
![]()
I have attached a screenshot about how it looks like, any kind of help would be appreciated.. thanks in advance
Its not a bug. Its an application called Game Booster.
What Game booster does is to control and monitor the Temperature and Memory. Once it detects that the application is heating or consuming too much memory, it optimized the phone by closing apps, adjusting brightness and other things that god only knows what. This is to prevent your app from over heating and forcr closing due to memory issues. Once optimization occurs, thats when the blue light over the navigation bar appears. In theory, it does the opposite of what you think. It optimizes the phone in such a way that it prevents abnormal usage in battery and memory to give the best experience in gaming. But sometimes it compromises the app by throtthling the game when it needs a boost in CPU and GPU. It depends on the application on when youd like to activate or disable this feature.
Do you want to disable it?
While playing a game, make the navigation bar appear and youll see a game booster icon in the lower left corner. Click on it and youll see monitoring temperature and memory icon. Click on it. Then click on Auto Control and disable it. Youll notice that the blue light will be gone because it doesnt optimize your apps anymore.
Edit: out of topic question. Do you experience frame drops in mobile legends? Especially when switching from one app then back to mobile legends?

- #11
Its not a bug. Its an application called Game Booster.What Game booster does is to control and monitor the Temperature and Memory. Once it detects that the application is heating or consuming too much memory, it optimized the phone by closing apps, adjusting brightness and other things that god only knows what. This is to prevent your app from over heating and forcr closing due to memory issues. Once optimization occurs, thats when the blue light over the navigation bar appears. In theory, it does the opposite of what you think. It optimizes the phone in such a way that it prevents abnormal usage in battery and memory to give the best experience in gaming. But sometimes it compromises the app by throtthling the game when it needs a boost in CPU and GPU. It depends on the application on when youd like to activate or disable this feature.
Do you want to disable it?
While playing a game, make the navigation bar appear and youll see a game booster icon in the lower left corner. Click on it and youll see monitoring temperature and memory icon. Click on it. Then click on Auto Control and disable it. Youll notice that the blue light will be gone because it doesnt optimize your apps anymore.Edit: out of topic question. Do you experience frame drops in mobile legends? Especially when switching from one app then back to mobile legends?
Thanks for this.. it's just as u said, the blue light is coming from the Temperature Control, once I toggled the auto control on/off the blue light is there.. now that u mentioned it I remember I recently updated Game Booster few days back.. Now I know where the light is coming from.. Thanks again.. :fingers-crossed:
I used to get lot of Frame Drop few weeks ago after this latest update with the "new form of spells", I could barely play anything.. but I didn't do anything tbh and just keep playing until now, and it's way better now. There is still some Frame Drops but it's only when super heavy stuff going on at once in the game, compared to the first time I experienced it, it's so light now even tho I didn't try to do anything to fix it.
- #12
Thanks for this.. it's just as u said, the blue light is coming from the Temperature Control, once I toggled the auto control on/off the blue light is there.. now that u mentioned it I remember I recently updated Game Booster few days back.. Now I know where the light is coming from.. Thanks again.. :fingers-crossed:I used to get lot of Frame Drop few weeks ago after this latest update with the "new form of spells", I could barely play anything.. but I didn't do anything tbh and just keep playing until now, and it's way better now. There is still some Frame Drops but it's only when super heavy stuff going on at once in the game, compared to the first time I experienced it, it's so light now even tho I didn't try to do anything to fix it.
Thanks for the confirmation too. I used to have a lot of frame drops but it was due to Game Booster and Game Optimizing Service not working well. After the update, it improved the performance significantly but there was only one bug left. It was when switching from the Game to another app, then going back to the game, it causes the game to start frame Dropping.
Hopefully it makes the update better on the coming days.
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Source: https://forum.xda-developers.com/t/random-blue-light-over-navigation-bar.3978347/
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