Kindle PW4 Minimum Brightness

[dnmmx]

Hey everyone,

I have PW4 with JB.
I want to know if it is possible to have minimum brightness lower than what's provided at level 1 i.e. Default minimum brightness. The reason is at night even the minimum brightness looks too much. I have tried the dark mode as well, but I think we all can use lower than minimum brightness at some point in time.

Everyone's input will be appreciated. Thanks.

[hius07]

No news since
https://www.mobileread.com/forums/sh...d.php?t=313191

[dnmmx]

Thanks @hius07 for your answer.

[j.p.s]

Originally Posted by dnmmx

I have PW4 with JB.
I want to know if it is possible to have minimum brightness lower than what's provided at level 1 i.e. Default minimum brightness. The reason is at night even the minimum brightness looks too much. I have tried the dark mode as well, but I think we all can use lower than minimum brightness at some point in time.

I don't have a PW4, but there is a KUAL extension to fine tune current brightness that works on a Voyage, but the file names are likely different on a PW4.

What are the files in /sys/class/backlight/

( ls -l would be best to see which are ordinary files, directories, and symbolic links. )

https://www.mobileread.com/forums/sh...ighlight=light

[dnmmx]

Hi J.p.s.
Here's the screenshot for you from PW4

https://ibb.co/6vWKL4F

By the way the extension or settings up the value doesn't change the brightness. Any help regarding this would be appreciated.

Btw, change in actual_brightness also doesn't make any changes.

[j.p.s]

Originally Posted by dnmmx

Hi J.p.s.
Here's the screenshot for you from PW4

https://ibb.co/6vWKL4F

By the way the extension or settings up the value doesn't change the brightness. Any help regarding this would be appreciated.

Btw, change in actual_brightness also doesn't make any changes.

The extension can't work on a PW4 because the contents of /sys/class/backlight/ are different, that is why I asked, because I do not have a PW4. Also, please use text instead of a photograph or at least use a screenshot. You can use the "screenshot" command in the terminal or tap 2 diagonal corners of the display.

When you did the echo > 1 command, did the screen get dim?

If not, there is nothing you can do.

If it does get dim, you can change all instances of max77696-bl in the script to bl.

/sys/class/backlight/actual_brightness is readonly. You can't change it.

You can save text output from a command like this:

ls -l /sys/class/backlight/ >> /mnt/us/command_out.txt

Then you can copy command_out.txt to your PC.

[dnmmx]

>>> When you did the echo > 1 command, did the screen get dim?
No, it did not get dimmer.

[j.p.s]

Originally Posted by dnmmx

>>> When you did the echo > 1 command, did the screen get dim?
No, it did not get dimmer.

Then hisses and boos go to amazon.