JailBreak (4.0.x - 4.1.2)

[NiLuJe]

Since it relies mostly on diags, and not main, should be good.

[J_VM]

Originally Posted by knc1

Try it, report back.
It will either work or do no harm.

Thank you, it looks like it worked! I got the book "you are jailbroken" !

[knc1]

Originally Posted by J_VM

Thank you, it looks like it worked! I got the book "you are jailbroken" !

Thanks for checking and for the report.

[nurusz]

Ok, the K4 is jailbreaken. after the process was finished I got a new file that say " You are jailbroken "
The question is how can I inter to the root directory and read/write/change what ever ?
In the root directory i see only the Duokan files which I installed before the jailbreak.
I tried to use FTP but it failed to connect to K4

[knc1]

Originally Posted by nurusz

Ok, the K4 is jailbreaken. after the process was finished I got a new file that say " You are jailbroken "
The question is how can I inter to the root directory and read/write/change what ever ?
In the root directory i see only the Duokan files which I installed before the jailbreak.
I tried to use FTP but it failed to connect to K4

Install our USBnetworking package.
Then use either TelNet or SSH over either the USB cable or WiFi.
(or sshfs, IIRC)

[aikau]

I am trying to jailbreak my K4NT. Opened https://wiki.mobileread.com/wiki/Kindle4NTHacking , downloaded/unpacked/copied "data.tar.gz & ENABLE_DIAGS files plus the diagnostic_logs folders to the Kindle's USB drive's root" and restarted the kindle Menu -> Settings -> Menu -> Restart. And it rebooted into the normal firmware, not a diag mode. The battery indicator reports full. What else to check?

[NiLuJe]

@aikau: make sure your OS isn't appending any 'helpful' extensions to the files, and that you are indeed extracting everything to the root of the device.

I'm not aware of any K4 ever refusing to boot into diags, so I'm assuming PEBCAK here.

[aikau]

Originally Posted by NiLuJe

@aikau: make sure your OS isn't appending any 'helpful' extensions to the files, and that you are indeed extracting everything to the root of the device.

I'm not aware of any K4 ever refusing to boot into diags, so I'm assuming PEBCAK here.

OS is fedora 22.

[aik@aik K4_JailBreak]$ cd /run/media/aik/Kindle/
[aik@aik Kindle]$ rm -rf .active-content-data/
[aik@aik Kindle]$ rm -rf .dropbox.device
[aik@aik Kindle]$ rm -rf *
[aik@aik Kindle]$ cd ~/Downloads/kindle/jailbreak/K4_JailBreak/
[aik@aik K4_JailBreak]$ cp -r data.tar.gz ENABLE_DIAGS diagnostic_logs/ /run/media/aik/Kindle/
[aik@aik K4_JailBreak]$ ls -la /run/media/aik/Kindle/
total 80
drwxr-xr-x. 3 aik aik 8192 Dec 23 11:37 .
drwxr-x---+ 7 root root 140 Dec 23 11:36 ..
-rw-r--r--. 1 aik aik 59938 Dec 23 11:37 data.tar.gz
drwxr-xr-x. 2 aik aik 8192 Dec 23 11:37 diagnostic_logs
-rw-r--r--. 1 aik aik 0 Dec 23 11:37 ENABLE_DIAGS


After safe removal ("eject" in caja and waited till kindle switches back to its books menu) + restart:

[aik@aik K4_JailBreak]$ ls -la /run/media/aik/Kindle/
total 72
drwxr-xr-x. 5 aik aik 8192 Jan 1 1970 .
drwxr-x---+ 7 root root 140 Dec 23 11:39 ..
drwxr-xr-x. 2 aik aik 8192 Jul 21 2012 .active-content-data
drwxr-xr-x. 2 aik aik 40960 May 30 2015 documents
-rw-r--r--. 1 aik aik 0 May 31 2015 DONT_HALT_ON_REPAIR
-rw-r--r--. 1 aik aik 56 Feb 13 2013 .dropbox.device
drwxr-xr-x. 4 aik aik 8192 Jan 10 2015 system


_Everything_ is back as it was before "rm", including all books. Where exactly is PEBCAK here? Thanks.

[knc1]

That one is easy to see, eMMC controller failure (its built into the eMMC device).
See:
https://www.mobileread.com/forums/sho...49&postcount=3

[eschwartz]

As knc1 says, being unable to permanently delete files (reappearing books ) is a sure sign that write operations to the device's internal storage have totally failed.

The ENABLE_DIAGS flag was therefore never actually created...

[NiLuJe]

Yup. Or the fuse proxy got its panties in a twist, but that usually means something's wonky on a lower level... (although I vaguely remember having it seen happen on perfectly sane devices).

On the off-chance: what happens if you try a factory reset? (Be warned: if there is indeed a HW failure, this might very well kill it dead).

[knc1]

Originally Posted by NiLuJe

Yup. Or the fuse proxy got its panties in a twist, but that usually means something's wonky on a lower level... (although I vaguely remember having it seen happen on perfectly sane devices).

- - - -

Where is that .dropbox.device coming from?
Reads like an add-in that you haven't mentioned being installed.
Where is it writing? /mnt/us or /mnt/base-us?

What else is installed that might be writing to the proxy?

I see that you did not cut&paste the list command output in-between code tags -
So is what you did post only a partial approximation or is that exactly the output of ls?
(reason: I see some other unusual things in those listings)

[RbnJrg]

I want to JB my K4NT and by reading the instructions, I see the previous thing is to copy to my Kindle root:

— data.tar.gz file
— ENABLE_DIAGS file
— diagnostic_logs folder

But inside the kindle-k4-jailbreak-1.8.N.zip file also there is a "keys" folder. Don't I have to copy also that folder to my Kindle root? If not, for what is that folder?

Finally, my FW version is 4.1.3, can I JB my Kindle with the current version of JB?

Many thanks in advance.
Rubén

[NiLuJe]

@RbnJrg:

Most likely, yes, since we rely much more on diags than on main.

As for the keys folder, surprisingly, it contains... keys (OTA & KDK). Vaguely useful for adventurous developers. A relic of how the original version used to be packaged.

[RbnJrg]

Originally Posted by NiLuJe

@RbnJrg:

Most likely, yes, since we rely much more on diags than on main.

As for the keys folder, surprisingly, it contains... keys (OTA & KDK). Vaguely useful for adventurous developers. A relic of how the original version used to be packaged.

Thank you very much for your quick answer! I tried the procedure and now I'm in a bit issue. After the step 4) "Q) To continue" (and I press "Left" on the 5-way keypad), I return to the previous step, that is, I see again the option Select "R) Reboot System". If I select this, then I'm going again to "Q) To continue" and so on. I'm in an endless loop. So, how can I escape of that?

Thank you very much in advance.
Rubén