Noob Jailbreak of old EOL Kindle DX not working.

DaveC1964 · 12-17-2025, 12:52 AM

I attempted to JB according to this article below.

https://www.zdnet.com/article/how-to...source-reader/

I used the "Update_jailbreak_0.13.N_dxi_install.bin" for my old Kindle DX with serial starting with B005. It updated and gave the usual .006 error.

I then installed the MKK file (MobileRead Kindlet Kit) according to article. It updated then restarted.

I then installed KUAL to documents as instructed. It failed when I tried to load with a message such as "app not authorized to run on this device" or something like that. I assume because the JB did not work so unsigned non Amazon apps will not load.

Also tried Launchpad per the article but the hotkeys did not work so again I assume the JB did not take.

What did I do wrong? I looked through the steps but couldn't figure it out.

Are there any other methods I should try?

Frogm4n · 12-17-2025, 04:59 PM

Quote:

Originally Posted by DaveC1964

What did I do wrong? I looked through the steps but couldn't figure it out.

Are there any other methods I should try?

You skipped the part about fixing the time and date. Since the 3G networks are dead, the DX can't automatically set them from it.

DaveC1964 · 12-18-2025, 01:38 AM

Quote:

Originally Posted by Frogm4n

You skipped the part about fixing the time and date. Since the 3G networks are dead, the DX can't automatically set them from it.

In the article the JB worked but Kual complained about the date. Mine didn't even get that far. Said nothing about the date, said was not signed by a registered developer.

Frogm4n · 12-18-2025, 12:17 PM

The date has to be reasonably correct for the signing certs to be valid. The article was using a Kindle that was in active use, and presumably had a reasonable date still, though it likely drifted after so long without sync to a tower. If your DX battery has fully died then yours lost the date and thinks it's 1970.

SpartanHeavy · 12-18-2025, 12:43 PM

Quote:

Originally Posted by DaveC1964

said was not signed by a registered developer.

Sounds like you installed the latest version of KUAL, v2.7.37. It's broken on Kindle DX.

You need to use the previous version, v2.7.35. It's available here:

https://storage.gra.cloud.ovh.net/v1...0250103.tar.xz

The developer certificates for that version expired in April 2025, so you'll have to keep your Kindle's clock set to a date before then.

DaveC1964 · Yesterday, 01:22 AM

Quote:

Originally Posted by SpartanHeavy

Sounds like you installed the latest version of KUAL, v2.7.37. It's broken on Kindle DX.

You need to use the previous version, v2.7.35. It's available here:

https://storage.gra.cloud.ovh.net/v1...0250103.tar.xz

The developer certificates for that version expired in April 2025, so you'll have to keep your Kindle's clock set to a date before then.

Ok. That seemed to work. Does that mean the JB took? I assume so? I couldn't figure out how to do anything with it though as it says "
no extensions found" after selection "kuel 1".

SpartanHeavy · Yesterday, 02:31 AM

Yeah, it sounds like the jailbreak and KUAL are working fine. Now you just need to install KOReader.

Download the koreader-kindle-legacy zip file from here: https://github.com/koreader/koreader/releases/latest

Unzip it to your Kindle's root directory, and then KOReader should appear in KUAL.

KOReader runs pretty slow on Kindle DX. To speed it up a little, I suggest starting it in "no framework" mode. Also, disabling all the plugins can help. To do that, look for the "plugin management" section in the menu after KOReader starts.

12-17-2025, 12:52 AM	#1
DaveC1964 Junior Member Posts: 3 Karma: 10 Join Date: Dec 2025 Device: Kindle DX	Noob Jailbreak of old EOL Kindle DX not working. I attempted to JB according to this article below. https://www.zdnet.com/article/how-to...source-reader/ I used the "Update_jailbreak_0.13.N_dxi_install.bin" for my old Kindle DX with serial starting with B005. It updated and gave the usual .006 error. I then installed the MKK file (MobileRead Kindlet Kit) according to article. It updated then restarted. I then installed KUAL to documents as instructed. It failed when I tried to load with a message such as "app not authorized to run on this device" or something like that. I assume because the JB did not work so unsigned non Amazon apps will not load. Also tried Launchpad per the article but the hotkeys did not work so again I assume the JB did not take. What did I do wrong? I looked through the steps but couldn't figure it out. Are there any other methods I should try? Last edited by DaveC1964; 12-17-2025 at 12:55 AM.

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12-18-2025, 12:17 PM	#4
Frogm4n Fanatic Posts: 544 Karma: 4000001 Join Date: Jul 2023 Device: Scribe 2022, OA2, PRS-350	The date has to be reasonably correct for the signing certs to be valid. The article was using a Kindle that was in active use, and presumably had a reasonable date still, though it likely drifted after so long without sync to a tower. If your DX battery has fully died then yours lost the date and thinks it's 1970.

Yesterday, 02:31 AM	#7
SpartanHeavy Connoisseur Posts: 54 Karma: 94 Join Date: Aug 2024 Device: K2 / K4 / PW5	Yeah, it sounds like the jailbreak and KUAL are working fine. Now you just need to install KOReader. Download the koreader-kindle-legacy zip file from here: https://github.com/koreader/koreader/releases/latest Unzip it to your Kindle's root directory, and then KOReader should appear in KUAL. KOReader runs pretty slow on Kindle DX. To speed it up a little, I suggest starting it in "no framework" mode. Also, disabling all the plugins can help. To do that, look for the "plugin management" section in the menu after KOReader starts.