Newbie questions about KOReader and KUAL

[leifan89]

Hello! I just bought a jailbroken Kindle Oasis 3 (FW 5.14.2) from someone on here MobileReads (thanks lexic!), and I have a couple of questions:

1. I tried to install the latest version of KOReader (2023.03, the "PW2" version, following instructions from https://github.com/koreader/koreader...Kindle-devices), and I have unzipped into the root directory of my Kindle (so there is both a /koreader and a /extensions/koreader directory), and I can see it in my KUAL booklet, but whenever I try to run it, KUAL just closes, and the whole screen flashes once, and then nothing happens afterwards. Tried the "no framework" and "ASAP" versions, and I don't even get the flashing - KUAL closes and nothing happens. I did see some logs in /koreader/crash:

---------------------------------------------
launching...
_ _____ ____ _
| |/ / _ \| _ \ ___ __ _ __| | ___ _ __
| ' / | | | |_) / _ \/ _` |/ _` |/ _ \ '__|
| . \ |_| | _ < __/ (_| | (_| | __/ |
|_|\_\___/|_| \_\___|\__,_|\__,_|\___|_|

It's a scroll... It's a codex... It's KOReader!
[*] Current time: 03/20/23-21:46:44[*] Version: v2023.03

ffi.load: libs/libutf8proc.so.2
ffi.load: blitbuffer
./luajit: ./ffi/framebuffer_linux.lua:55: cannot open framebuffer
stack traceback:
[C]: in function 'assert'
./ffi/framebuffer_linux.lua:55: in function 'init'
./ffi/framebuffer_mxcfb.lua:763: in function 'init'
./ffi/framebuffer.lua:138: in function 'new'
frontend/device/kindle/device.lua:1044: in function 'init'
frontend/device.lua:62: in main chunk
[C]: in function 'require'
./reader.lua:151: in main chunk
[C]: at 0x00013e9d

Has anyone seen this before?

2. I'm not sure I understand how KUAL is supposed to work. Whenever I press on some item in the menu (e.g. KUAL -> "Rename OTA binaries" -> "Rename"), KUAL just closes. Does that mean... it did anything? Same thing if I put some .bin into the /mrpackages directory and go to KUAL -> Helper+ -> Install MR Packages, it just takes me back to the Oasis home screen and nothing happens. This isn't the case for all menu items though (KUAL -> Helper+ -> SHOW Network Info DOES show network info after quitting to the home screen), so I'm quite confused on how this is supposed to work.

Thank you all so much!

[NiLuJe]

That looks like an incomplete jailbreak (the KOReader log is pretty damning, and that would also explain the KUAL behavior you're seeing).

Reinstall the latest hotfix and reboot a couple of times, see if it helps?

[leifan89]

Thanks so much @NiLuJe for your help!

I tried to follow the steps from https://www.mobileread.com/forums/sh...d.php?t=346037, the Post Jailbreak portion only:

1. After the device has rebooted, type ;uzb into the search bar

I reboot the device (not in demo mode, also logged into Amazon), type ";uzb" into the search bar, nothing happens, I just go back to the home screen.

2. Connect the device to a PC and copy Update_hotfix_watchthis_custom.bin to the root of the Kindle storage

Done.

3. Eject the device and either enter ;dsts or swipe down and select the settings icon to enter the device settings menu

";dsts" does nothing, have to manually select the settings icon.

4. Select Update Your Kindle to install the custom hotfix

"Update Your Kindle" is grayed out.


Should I have reset the device or factory-reset the device before trying these? Should I log out of Amazon?

Is there a way to wipe the partial jailbreak and completely start over the JB process?

Thanks again for your help!

[leifan89]

OK - managed to redo all of jailbreaking and now I have KUAL and KOReader all working as expected. Thank you again for your help!