PW4 Enable Dark mode widget without registering

[lazanet]

Hi, I've managed to successfully JB my PW4 running 5.13.6 FW using new technique. I installed KUAL with "Helper", "FakeRegister", and "Remove OTA binaries" packages.

It all works, but since factory reset step my device isn't properly registered and that results in missing Bluetooth and Dark Mode buttons in Quick Settings. I'm not comfortable with connecting to the internet and risking automatic updates just in case some previous step wasn't sufficient.

During debugging, I extracted the firmware using `kindletool`, then mounted the rootfs image locally and decompiled the entire classpath from `/opt/amazon/ebook/lib` using JetBrains Fernflower decompiler.

I'm fairly new to the whole Kindle hacking scene, but it seems to me that my main issue originates from ColorInversionProperties not being populated since `/var/local/java/prefs/ColorInversion.preferences` is missing from my system. Can someone who has their device properly registered and jailbroken upload their ColorInversion.preferences file for me to test this theory?

Other idea that I have is to patch bytecode for QuickSettingsPanel class in order to skip checks for instantiating ColorInversionWidgetController and BluetoothWidgetController, but this seems really messy and I would prefer to avoid it if someone jumps in with a better suggestion.

Thanks in advance!

[lazanet]

Ok, I finally figured it out. For future reference here is roughly what you need to do:

1) Create a new file at /var/local/java/prefs/ColorInversion.preferences that should contain the following:

#User preferences for ColorInversionPreferences
#Fri Apr 29 15:29:20 GMT+01:55 2022
currentTreatment=T1
isUserInteracted=true
isTutorialShown=true

2) Make it read only by running:

# chmod 0444 /var/local/java/prefs/ColorInversion.preferences`

3) Now the tricky part... No matter what you did with pref file, system will use value from `/var/local/KWISClient.db` instead. So what you need to do is to extract that file, open it using some sqlite editor and insert the following row:

INSERT INTO "main"."experiments" ("extra_identifier", "experiment", "treatment") VALUES ('KINDLE_EINK_DARK_MODE', 'KINDLE_EINK_DARK_MODE_249201', 'T1');

Voila, Dark mode button is back on your 5.13.6's Quick Settings screen without logging in.

These steps could be automated via custom KUAL package, but frankly I've lost way too much time figuring this out and crawling through obfuscated source code. Also I haven't fixed missing bluetooth button, but since it depends on Audible connection it wouldn't be of much use anyway.

[tinycrabman6]

Thank you lazanet for this. I was able to follow your instructions successfully on a PW5 on 5.14.1.1 with the UI reverted to the 5.13.6 style.

For some reason in addition to missing the dark mode toggle, I had two other settings that were absent, but can be reactivated using the same files.


To enable the "display book cover" option in the settings menu:

1) Create a file at /var/local/java/prefs/BookCover.preference containing the following:

#User preferences for Book Cover Preferences
#Sun May 29 18:17:30 GMT-06:00 2022
BookCoversEnabled=false
isBCSettingAccessed=true

2) And for `/var/local/KWISClient.db` insert this SQLite row:

INSERT INTO "main"."experiments" ("extra_identifier", "experiment", "treatment") VALUES ('CuratorBookCovers', 'EREADER_CURATOR_BOOK_COVERS_307723', 'T2');

To enable indicators for the last viewed locations in the pagenav, insert these three SQLite lines into KWISClient.db:

1) Ereader Unified Sync

INSERT INTO "main"."experiments" ("extra_identifier", "experiment", "treatment") VALUES ('EreaderUnifiedSync', 'EREADER_UNIFIED_SYNC_MILESTONE2_319553', 'C');

INSERT INTO "main"."experiments" ("extra_identifier", "experiment", "treatment") VALUES ('EreaderUnifiedSync', 'EREADER_UNIFIED_SYNC_MILESTONE1_308341', 'C');

2)Page Flip View

INSERT INTO "main"."experiments" ("extra_identifier", "experiment", "treatment") VALUES ('PageFlipViewDialogRevamp', 'PAGE_FLIP_VIEW_REVAMP_267001', 'T1');

[Gandulf]

I saw a post that said if you full your storage that will prevent an update if you logon to register.

What do you do about a Dictionary? I didn't know when you reset the kindle you would also loose it.

[mergen3107]

Originally Posted by Gandulf

What do you do about a Dictionary? I didn't know when you reset the kindle you would also loose it.

Try to find dictionaries in your Amazon account - Content and Devices

[cearp]

Originally Posted by tinycrabman6

for `/var/local/KWISClient.db` insert this SQLite row:

INSERT INTO "main"."experiments" ("extra_identifier", "experiment", "treatment") VALUES ('CuratorBookCovers', 'EREADER_CURATOR_BOOK_COVERS_307723', 'T2');

Thank you! On my PW4, dark mode is enabled already, but the book cover option is not. Not unless I register and go online.
I didn't have to create the preference file, I simply added the entry to the database file, rebooted, and that was enough.

I did this after a reset, and did not even register or go online this time - so that is cool.


Regarding the dictionaries, it is possible to de-DRM all of the dictionaries you need from a device that has them, and then simply place them in /documents/dictionaries.
(I'm not sure if it was necessary to remove the DRM, I assume they are protected.)
But I took a dictionary from a registered PW5, removed the DRM, and placed it on my unregistered PW4 - worked fine!