Blue Shae Adjustment in Fire Hd Does Not Work

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[TUT] Enable system level night mode/night shift/blue light filter, no root required.

• Thread starter 123nate
• Start date Oct 27, 2020

• #1

I just got a Fire HD 10 9th gen, and I can't root it, so unfortunately I could not install f.lux. I did some googling and it turns out you can turn on androids built in night mode instead with an ABD shell command, I have no idea why Amazon makes you use their crappy blue light filter, which is really just an overlay. So anyways,
1. Plug your Fire HD into your computer
2. Start an ABD shell (I use Fire Toolbox to do this easily)
3. Paste these two commands, one at a time:
"settings put secure night_display_activated 1"
"settings put secure night_display_auto_mode 1"
4. Open settings on your Fire HD, it should say night mode is enabled at the top, click this to change the schedule to sunset to sunrise or to any time range you want.
5. Use your Fire HD at night without being blinded or washing out your screen with amazon's crappy filter.

• #2

Thanks, the default night mode is so much better than the Blue shade filter crap they put in.

• #3

Oh NightLight does NOT show up on Screenshots!
But yes. it is indeed VERRY much better.
Thanks a lot.

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• #4

So, the "night mode" in settings isn't shown after reboot? Do we have to run the adb commands every time we want to make changes?

• #5

If you leave it on "Automatic" it will show up again at night!

• #6

So, the "night mode" in settings isn't shown after reboot? Do we have to run the adb commands every time we want to make changes?

There isn't a "night mode" setting enabled there. But if you go to settings after pushing those adb commands and go in to settings, there will be a drop down from the top that says something like night mode is enabled. You can click that and set the time to activate it.

• #7

any way to make to stick it permanently even when rebooted and messed with? is there way to write these as init when I boot the FireHD?

• #9

I just got a Fire HD 10 9th gen, and I can't root it, so unfortunately I could not install f.lux. I did some googling and it turns out you can turn on androids built in night mode instead with an ABD shell command, I have no idea why Amazon makes you use their crappy blue light filter, which is really just an overlay. So anyways,
1. Plug your Fire HD into your computer
2. Start an ABD shell (I use Fire Toolbox to do this easily)
3. Paste these two commands, one at a time:
"settings put secure night_display_activated 1"
"settings put secure night_display_auto_mode 1"
4. Open settings on your Fire HD, it should say night mode is enabled at the top, click this to change the schedule to sunset to sunrise or to any time range you want.
5. Use your Fire HD at night without being blinded or washing out your screen with amazon's crappy filter.

I tried this on a Samsung Galaxy Tab S8 running Android 12. The display went dark, and luckily I quickly set the first command to 0 instead of 1
When I did the 2nd command, it did nothing, but I'm worried the screen will stop showing anything later tonight if it's based off of automatically turning on at sunset.
I'm wondering if you know a way to do this now, for example maybe adjusting the Night Light settings?
The built in version on Samsung's tablet, which has an LCD display, is awful. No such problem with OLED or AMOLED displays.
https://www.reddit.com/r/GalaxyTab/comments/mu8m5a That is a link explaining my problem in detail
I am thinking I am halfway there because running
settings put secure night_display_activated 1
Makes the display go dark and changing it to 0 or any other number like 2 or 3 switches it back to working.
I also tested both commands on my Pixel 6 Pro running Android 12 and they work perfectly.
running the second command as 2 or 3 picks either set times to automatically turn on or from sunset to sunrise.
I just need to try modifying the Night Light to be anything other than black
When I run the command, it changes the filter to black, because the screen stays on, and I can tell it's still on because the LCD shows light through a black screen

• #10

Yeah, the "eye care" mode is such stupid naive implementation of Samsung LCD tablets. And they also don't let you change the color temperature in the display settings like on Samsung AMOLED devices.
You can change to vivid or natural but no color temperature.

All the thridparty apps use this stupid trick with the color overlay because a app is not able to change the display calibration settings.

BUT Samsung should know better and change the screen color calibration to get the low blue light effect.
They are root users and should have the know how for their devices.
Because vivid and natural also changes the screens color calibration, they should be able to so instead of this stupid orange overlay.

With the extra dim mode I could not find out if they also simply put on a gray overlay or reduce correctly the led backlight to a minimum. But according to their stupid design choices and thinking the customer is dumb and will not notice, this is maybe also a gray overlay.

People are complaining for 2 years now, starting with the Tab S7!
If somebody also thinks that this is a dumb implementation please report this issue to Samsung: e.g. https://www.samsung.com/us/support/contact/

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Source: https://forum.xda-developers.com/t/tut-enable-system-level-night-mode-night-shift-blue-light-filter-no-root-required.4182449/

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