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Old 08-12-2021, 04:14 PM   #1
RobertJSawyer
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Toggling the new Dark Mode with latest firmware

With the just-released firmware 4.28.18220, the old Invert Screen mode has been replaced with a new Dark Mode. The old mode worked on all screens, and inverted everything including images and book covers; the new one works only in books and articles from Pocket, but does not invert images or menus. It's actually pretty cool, and works fine on my Kobo Clara HD:

To enable it and be able to toggle it on and off from your device, you should install Nickel Menu.

If you already are using an older version of Nickel Menu, copy your menu file from KOBOeReader/.adds/nm to a safe place on your computer, then completely delete this folder: KOBOeReader/.adds/nm. It will be automatically recreated when your Kobo reboots after you safely eject it.

Now, get the latest release of Nickel Menu from here:

https://www.mobileread.com/forums/sh...&postcount=555

Unzip the zip file to reveal the KoboRoot.tgz file and copy that to this folder on your Kobo:

KOBOeReader/.kobo. (You may need to show hidden files to see the folder.)

Now, follow the instructions in the first message here:

https://www.mobileread.com/forums/sh...d.php?t=329525

Then, add this line to your Nickel Menu configuration file (I call mine config-nickel-menu.txt):

Code:
menu_item :main :Dark Mode :nickel_setting :toggle :dark_mode
This will allow the toggling of dark mode on and off from the home screen, although you won't see the effect until you open a book. If you want to add the toggling of dark mode to your reading screen, also put this line in your Nickel menu configuration file:

Code:
menu_item :reader: Dark Mode :nickel_setting :toggle :dark_mode
NOTE: You'll need to close and then reopen the book you're reading for the switchover to/from dark mode to take effect. Alternatively, from within a book you can bring up the table of contents or the list of annotations, then close that -- that will also cause the switchover to/from dark mode to take effect.


Last edited by RobertJSawyer; 09-27-2021 at 11:44 AM.
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Old 08-12-2021, 04:30 PM   #2
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Quote:
Originally Posted by RobertJSawyer View Post
The toggling of dark mode on and off only works from the home screen, not from within a book.
This is not correct, it works in any menu. It's just silly to put it in the reading menu, since you need to close the book and open it again, and these are unnecessary movements. In any other (for example, library) you can.
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Old 08-12-2021, 05:27 PM   #3
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Not a fan of the new dark mode. I usually read at night so it's probably more of an issue than for someone that just likes reading this way in the light.

Even though I have the brightness at 2% when I open annotations for example I get a bit blinded, upsets my reading tranquillity......
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Old 08-12-2021, 06:23 PM   #4
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@Semwize: I've updated the instructions in the first message. Thanks!
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Old 08-12-2021, 06:43 PM   #5
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I think I know how I can make this take effect instantly, but I won't be able to test it until later this week.
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Old 08-16-2021, 01:41 AM   #6
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Quote:
Originally Posted by Rid View Post
Not a fan of the new dark mode. I usually read at night so it's probably more of an issue than for someone that just likes reading this way in the light.

Even though I have the brightness at 2% when I open annotations for example I get a bit blinded, upsets my reading tranquillity......
If you really want to return the Invert Screen
https://www.mobileread.com/forums/sh...71&postcount=9
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Old 08-16-2021, 02:06 PM   #7
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Combining the new Dark Mode with the old Invert Screen mode:

I got curious as to what would happen if both Invert Screen and Dark Mode are used at the same time. Here's what I found on my Kobo Clara HD. Note: I had to do a soft reset (hold power button for twenty seconds) to get Invert Mode to take effect after setting it to "true" in the file "Kobo eReader.conf" with these lines:

[FeatureSettings]
DarkMode=true
InvertScreen=true

The net effect is that InvertScreen works as before, inverting everything. The DarkModew toggle in Nickel Menu works, too, but does the OPPOSITE of what it says it's doing: when it says the mode is enabled, it's disabled, and vice versa.

You can still toggle Dark Mode, which affects only the actual book but not menus or dictionary screens. So, you get all the benefits EXCEPT that pictures are, as they were always were under Invert Screen, inverted, as are menus, dictionaries, annotation screens, and the opening screen.

Invert Screen ON and Dark Mode Off:



Invert Screen ON and Dark Mode ON:


Last edited by RobertJSawyer; 09-27-2021 at 11:47 AM.
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Old 08-16-2021, 11:40 PM   #8
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Quote:
Originally Posted by RobertJSawyer View Post
Note: I had to do a soft reset (hold power button for twenty seconds) to get Invert Mode to take effect
To shutdown the devices, you should only need to hold the power button down for a few of seconds. That should start a clean shutdown and display the powered off screen. Depending on the device, you might need to wait a few seconds before you can turn it on again.

The "hold for twenty seconds" is for non-responsive devices to ensure they are powered off. If it is needed, the device probably will not do a clean shutdown and won't change the screen.
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Old 08-17-2021, 10:24 AM   #9
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Toggling Invert Screen in NickelMenu works (after the device is rebooted). Although it is not noticeable before the reboot, screen just flashes.
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Old 08-20-2021, 11:27 PM   #10
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Quote:
Originally Posted by Semwize View Post
If you really want to return the Invert Screen
https://www.mobileread.com/forums/sh...71&postcount=9
Thanks did test it, but too much of a pain.

Might ask in other thread if NM (command line) can change or swap the config file, at a later date. It depends on what I am reading, but really not much of a difference to me for restarting the kobo if I decided to change to dark mode while i am reading a book....

Last edited by Rid; 08-20-2021 at 11:43 PM.
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Old 08-21-2021, 02:29 AM   #11
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Originally Posted by Rid View Post
Might ask in other thread if NM (command line) can change or swap the config file, at a later date.
To be honest, I didn't really understand what you want after this post, but in NickelMenu you can do something like this:
Code:
menu_item :reader :Invert Screen   :nickel_setting :toggle:invert
    chain_success                  :power          :reboot
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Old 08-21-2021, 03:09 AM   #12
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Quote:
Originally Posted by Semwize View Post
To be honest, I didn't really understand what you want after this post, but in NickelMenu you can do something like this:
Code:
menu_item :reader :Invert Screen   :nickel_setting :toggle:invert
    chain_success                  :power          :reboot
I might have been over thinking it (and stuffed up that I forgot to reboot). I believe that might be what I was looking for!
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Old 09-16-2021, 10:11 PM   #13
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I have noticed you can use Darkmode while reading a book. If you open & close the TOC or Annotations after enabling or disabling Darkmode. It's like it needs a refresh?

It still takes 2 taps but it is HEAPS quicker than closing and opening the book again! A few milliseconds at least
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Old 10-01-2021, 11:23 AM   #14
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Quote:
Originally Posted by RobertJSawyer View Post
Combining the new Dark Mode with the old Invert Screen mode:

I got curious as to what would happen if both Invert Screen and Dark Mode are used at the same time. Here's what I found on my Kobo Clara HD. Note: I had to do a soft reset (hold power button for twenty seconds) to get Invert Mode to take effect after setting it to "true" in the file "Kobo eReader.conf" with these lines:

[FeatureSettings]
DarkMode=true
InvertScreen=true

The net effect is that InvertScreen works as before, inverting everything. The DarkModew toggle in Nickel Menu works, too, but does the OPPOSITE of what it says it's doing: when it says the mode is enabled, it's disabled, and vice versa.

You can still toggle Dark Mode, which affects only the actual book but not menus or dictionary screens. So, you get all the benefits EXCEPT that pictures are, as they were always were under Invert Screen, inverted, as are menus, dictionaries, annotation screens, and the opening screen.

Invert Screen ON and Dark Mode Off:



Invert Screen ON and Dark Mode ON:

my screen appear black and the box white, I cannot get it lake you
[IMG]file:///run/media/kleber/KOBOeReader/screen_042.png[/IMG]
[IMG]file:///run/media/kleber/KOBOeReader/screen_043.png[/IMG]

Last edited by kleber souza; 10-01-2021 at 11:36 AM.
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Old 10-01-2021, 12:10 PM   #15
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Though with the brightness correct there is no evidence of any human advantage to "dark mode". In pre-GUI CRT days most screens used dark mode. It was only brought back to save power on OLED as dark mode is less than 1/6th of the power. Fonts are all optimised to alias and hint as black on white. It makes no difference to eInk or LCD power consumption in principle. The backlight (LCD) or frontlight (eink) may be to set higher for dark mode which is the only reason it seems easier on the eyes (having it too high in normal mode).

It's partly fashion and partly some people have got used to it on LCD screens otherwise set too bright.
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