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Old 02-08-2013, 04:35 PM   #1
Jackie7
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Paperwhite: how to turn of backlight completely?

Hi,

I have recently bought a brand new Kindle Paperwhite from Amazon, abd despite my old Kindle 4, it is impossible to completely turn of the background illumination, i.e. even if I set it to zero, the backlight will still be visible in dark light. This will eat up my battery.

The question is: is that normal, or a bug? What can I do about it?
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Old 02-08-2013, 04:47 PM   #2
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It's normal behavior. The light is always on.
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Old 02-08-2013, 05:00 PM   #3
Jackie7
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It's normal behavior. The light is always on.
But why is it not possible to turn it of? The other kindles don't have that light, and therefore much longer battery life. Why did Amazon sacrifice that?
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Old 02-08-2013, 05:07 PM   #4
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Quote:
Originally Posted by Jackie7 View Post
But why is it not possible to turn it of? The other kindles don't have that light, and therefore much longer battery life. Why did Amazon sacrifice that?

If you turn it all the way down to 1, the light uses virtually no power. I adjusted my habits from keeping the light at 12 to using it at 3 in the dark, and I now get several more days before I need to charge it.
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Old 02-08-2013, 05:26 PM   #5
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If you do want it off completely, there's a thread about it in Developer Corner
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Old 02-08-2013, 05:28 PM   #6
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I am sure the reason is the amount of battery consumed at the lowest setting just isn't significant. I remain amazed at my PW battery life and I keep mine set around 14.
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Old 02-08-2013, 06:53 PM   #7
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Without "hacking?" You don't.
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Old 02-08-2013, 09:43 PM   #8
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I use my light on around 10-8 and in the dark 5-3 and the battery life outshines my other Kindles.
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Old 02-08-2013, 11:51 PM   #9
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Quote:
Originally Posted by Jackie7 View Post
Hi,

I have recently bought a brand new Kindle Paperwhite from Amazon, abd despite my old Kindle 4, it is impossible to completely turn of the background illumination, i.e. even if I set it to zero, the backlight will still be visible in dark light. This will eat up my battery.

The question is: is that normal, or a bug? What can I do about it?
Quote:
Originally Posted by Ephemerality View Post
If you do want it off completely, there's a thread about it in Developer Corner
Quote:
Originally Posted by VaultBoy View Post
Without "hacking?" You don't.
That depends on your definition of "hacking". In above mentioned thread I did post a light toggle switch for KUAL (see here) which adds a button to KUAL (jailbreaking still required for it). This version does not modify any system files any more - unlike posts #1, #6, #63 in said thread. All those other 3 methods require some altering by yourself of system files.

You will also find: Turn Off Frontlight W/O Jailbreak in that thread, which lets you turn the light off w/o requiring jailbreak.

And I apologize for this shameless self-advertisement - 3 of those above mentioned and linked posts are done by me.
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Old 02-09-2013, 03:27 AM   #10
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You can do it with a magnet cover

http://www.actualidadkd.com/como-apa...le-paperwhite/

To turn the light off to do a quick and short at the top of the cover out, as if you tried to open the lid, but not.
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Old 02-09-2013, 03:41 AM   #11
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Quote:
Originally Posted by Jackie7 View Post
The question is: is that normal, or a bug? What can I do about it?
As other posters said, it is normal.
No it will not eat your battery.

If you are still concenred, you can install KUAL and a program for switching the light completely off.

My preffered solution is the installation of the Coolreader3 from Crazy Coder. In the Coolreader you can switch the light completely off. It also supports many formats, it supports hierarchical directories and many more options.

To install KUAL and program to switch off the light or Coolreader you need to jailbreak your KPW. To jailbreak it, you might need to downgrade the formware.

You can also install Duokan. Duokan is the alternative Chinese firmware that completely takes over the Kindle. After installation you can restart the Kindle in the original firmware if you wish. Installation of Duokan is not for the faint of heart, because after installation it is set to Chinese, and you have to set it to English interface using picture How-To.
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Old 02-09-2013, 07:14 AM   #12
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Yea the light is always on. Even on the lowest setting is should use very minimal power.
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Old 02-09-2013, 08:36 AM   #13
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+1 to Me. Use a magnet, it is much simpler than software solutions.
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Old 02-09-2013, 09:44 AM   #14
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Why bother? The power drain of the lighting LEDs on minimum brightness is completely negligible.
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Old 02-09-2013, 11:08 AM   #15
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Why bother? The power drain of the lighting LEDs on minimum brightness is completely negligible.
Harry, I completely agree with that. Turning off the light to save battery drain is useless and silly. It is arguably not visible on lowest setting either (unless in the dark when you need it).

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