Tools Introducing WinterBreak - Better Late Than Never

[jhowell]

I decided to try WinterBreak my Colorsoft prior to updating the firmware from 5.18.0.1 to 5.18.1 since it will no longer be possible afterward, at least for now.

I am having trouble getting KUAL to install under MRPI. I tried two different versions and neither appears to recognize my device. Here is the relevant info from the mrinstaller log file:


Package 'Update_KUALBooklet_18b218e_install.bin' (KUALBooklet 18b218e I) is not targeting your device [10A6 vs. 11 (followed by a long list of numbers)

Package 'Update_KUALBooklet_ALLDEVICES_KS2_install.bin' (KUALBooklet ALLDEVICES KS2 I) is not targeting your device [10A6 vs. 11 (followed by a long list of numbers)


The jailbreak and hotfix appear to have worked so I believe it would be safe to update my firmware. But I am reluctant to do something that cannot be undone before this problem is resolved.

I would appreciate any information on whether I am doing something wrong or if KUAL simply does not support some recent Kindle models.

[mergen3107]

It is just not updated yet.
What’s your end goal?
FWIW, you can just use scriplets to run KOReader without KUAL, if that’s all you really want

[jhowell]

Originally Posted by mergen3107

It is just not updated yet.
What’s your end goal?

I want to be able to connect using SSH and have access to all of the disk partitions on the device. I am worried that future updates will restrict access to ebook files needed for DRM removal, especially on this device that uses MTP.

Originally Posted by mergen3107

FWIW, you can just use scriplets to run KOReader without KUAL, if that’s all you really want

I will give that a try to see if that works on my device.

[mergen3107]

(there is also a version of mrpi that blindly installs any packages without checking model, but use it at your own risk)

[T1t0]

Originally Posted by BionicGecko

See this thread.

Is it safe to do this procedure?

[BionicGecko]

Originally Posted by T1t0

Is it safe to do this procedure?

Yes, the jailbreak files are no longer needed after the jailbreak is complete.

[BionicGecko]

Originally Posted by jhowell

I am having trouble getting KUAL to install under MRPI
...

Package 'Update_KUALBooklet_ALLDEVICES_KS2_install.bin' (KUALBooklet ALLDEVICES KS2 I) is not targeting your device [10A6 vs. 11 (followed by a long list of numbers)


I would appreciate any information on whether I am doing something wrong or if KUAL simply does not support some recent Kindle models.

Are you sure you are using the very latest KUAL installer from kindlemodding.org? I recently successfully reinstalled it on my Colorsoft, and while my device has a different hardware ID than yours, from the log file, it does look like yours is supported in that version:

[2025-03-31 @ 10:21:13 +0200] :: [MRPI r19303] - Beginning the processing of package 'Update_KUALBooklet_ALLDEVICES_KS2_install(1).bin' (KUALBooklet ALLDEVICES KS2 I(1)) . . .

Extracting update package 'Update_KUALBooklet_ALLDEVICES_KS2_install(1).bin' to '/var/tmp/mrpi/staging'.
Bundle         SP01 (Signing Envelope)
Cert number    0
Cert file      pubdevkey01.pem (Developer)
Bundle         FC04 (OTA [ota])
Bundle Type    OTA V2
Minimum OTA    0
Target OTA     18446744073709551615
Devices        162
Device         Kindle 5 Touch WiFi (0x11)
Device         Kindle 5 Touch WiFi+3G (0x0F)
...
Device         Unknown (3H7 -> 0xE27)
Device         Unknown (3JT -> 0xE5B)
Device         Unknown (3J6 -> 0xE46)
Device         Unknown (456 -> 0x10A6)
Critical       0
Padding Byte   0 (0x00)
MD5 Hash       f0a0e9aa21a9836300afa86633c39157
Metadata       0
x whispertouch.install.sql
x appreg.install.sql
x KUALBooklet.jar
x libotautils5
x install.sh
x whispertouch.install.sql.sig
x appreg.install.sql.sig
x KUALBooklet.jar.sig
x libotautils5.sig
x install.sh.sig
x update-filelist.dat.sig
x update-filelist.dat
--
Running 'install.sh' for 'KUALBooklet ALLDEVICES KS2 I(1)' (Update_KUALBooklet_ALLDEVICES_KS2_install(1).bin) @ Mon, 31 Mar 2025 10:21:14 +0200

system: I ota_script:install::installing booklet
system: I ota_script:install::registering booklet
system: I ota_script:install::Checking device ID via /mnt/us/libkh/bin/fbink
system: I ota_script:install::creating application
system: I ota_script:install::cleaning up
system: I ota_script:install::done

Success! :)

[jhowell]

Originally Posted by BionicGecko

Are you sure you are using the very latest KUAL installer from kindlemodding.org?

Yes. I downloaded it again from your link and verified that the file is identical to the one that I tried.

Originally Posted by BionicGecko

I recently successfully reinstalled it on my Colorsoft, and while my device has a different hardware ID than yours, from the log file, it does look like yours is supported in that version:

Even so, it does not install on my device using MRPI provided by Marek (https://fw.notmarek.com/khf/kual-mrinstaller-khf.tar.xz) linked to from kindlemodding.org.


Added: in my mrinstaller.log file the last allowed value shown for that package is E46. It appears that MRPI somehow misses that last supported device shown in your log (10A6) when comparing versions.

[Waylander]

Originally Posted by BionicGecko

See this thread.

I tried to follow this procedure, but I didn't have the .active_content_sandbox folder, only the other two, Mesquito and Apps. After deleting these and restarting, the Kindle store shows an error message saying "There was a problem loading this page".

[hius07]

The 5.18.1 firmware bin file is forcibly downloaded while WinterBreaking.
Can it be deleted manually, before installing the hotfix, to avoid firmware updating on reboot?

[rantanplan]

Wait, the update is downloaded even if I have the otarenamer installed?

[hius07]

No, I mean new not yet jailbroken devices.

[ardeact]

I've been trying to do it with "Application error" for hundred times, only to realize my firmware version 5.18.1 has been patched :/
Always happens to me.

[WillysJeepMan]

Originally Posted by LRO

I created an account to share that this finally worked for me. I tried all methods, but only this one succeeded. Maybe it will help someone else. Thank you! 🤝

Here’s my process on PW3:

ℹ️ I shared Wi-Fi through the hotspot on my phone.

• Factory reset kindle
• Select Language and Region
• Plug Kindle into PC and copy Winterbreak files
• Eject then unplug Kindle
• Register kindle, No thanks to „Kid Friendly“, No thanks to „Kindle Unlimited“
• Turn on airplane mode and plug kindle into computer
• Delete folder .active_context_sandbox
• Eject & unplug Kindle
• Reboot kindle
• Turn off airplane mode
• ❌ Download book from library & Download free book from Amazon Prime Reading. 💬 I didn’t have any books in the library and couldn’t figure out how to download a free book from Prime Reading.
• Go to the kindle store with the Wi-Fi connected and browse around for 10 minutes. 💬 While in the Kindle store, I checked out various books, read descriptions, and downloaded a free sample from a random book.
• Exit the store & let Kindle sleep for 30 minutes.
• Plug kindle into computer to check if it is done generating the folder with its files, check the folder .active_content_sandbox > store > resource > cachedresources.💬 At this point, there were files called „secondary store“ and „index“, and „localstorage“ was also there.
• Eject then unplug kindle
• Turn on airplane mode
• Plug kindle into computer
• Copy the „index“ file from Winterbreak AND delete localstorage directory
• Eject then unplug kindle & reboot
• Open Kindle Store, turn off Airplane mode when promted. At last, bingo!

Thank you!
I have a 10th gen Base Kindle that started out with 5.16.10.0.1 and could not jailbreak it after over a dozen attempts. Only the steps you outlined worked.

I followed your instructions and in spite of it upgrading to 5.17.1.0.3 during that final reboot step, I was able to get it jailbroken and hotfix installed.

[acoustical]

I have a Kindle paperwhite 11th gen and I was able to run winterbreak and the hotfix. However, kual wasn't working so I tried to reinstall. In the process of re-running the hotfix, my firmware was somehow updated to kindle 5.18.1

Am I still jailbroken? Would I be able to install kual? I keep trying but when I enter the ";log mrpi" command it just takes me back to the home screen. Any thoughts on how I should proceed?