Forcing KV to run 5.14+

This page will guide you through how to make the Kindle Voyage run firmware 5.14+, Keep in mind that this is experimental, and you may damage your device.

Info taken from the original thread: https://www.mobileread.com/forums/showthread.php?t=343385

So, the PW3 and the KV is actually almost identical in terms of the underlying hardware, and with an identical partition layout, it is possible to cross-flash firmware from one device to another. Heck, even the KT2 with 256MB of ram can run 5.14+ though it is not really recommended as the React UI of 5.13.7+ does take up more resources and memory exhaustion becomes a problem.

The only real exception to this Wario hardware family (PW2, PW3, KT2, KV) is the PW2 as it has a slightly smaller RootFS than the other 3 (as I've found out the hard way), while it is still possible to run 5.14.1 on the PW2, some modifications are needed to trim down the RootFS' size.

By following this guide, I bear no responsibility if you break your Kindle, caused a house fire, or accidentally open up a wormhole to the 818th dimension. You have been warned!

Prerequisites:

• A Kindle Voyage (duh) with a 1.8v USB to serial adapter soldered to it.

• A PC running Linux, or a Mac.

• NiLuJe's KindleTool. (Grab this from your distro's package manager, or brew in macOS.)

• PW3 update file, https://s3.amazonaws.com/firmwaredownloads/update_kindle_all_new_paperwhite_5.XX.X.bin Replace 5.XX.X with the version you desire, such as 5.14.2.

Process:

1. Download the copy of a PW3 update file as mentioned above. Then extract it using KindleTool:

kindletool extract ~/Downloads/update_kindle_all_new_paperwhite_5.XX.X.bin /tmp/pw3

1. Once that's done, decompress rootfs.img.gz to obtain the raw rootfs.img:

gzip -d /tmp/pw3/rootfs.img.gz

1. Reboot your Kindle with active serial connection, then interrupt the boot process by rapidly hitting Enter until you get to the uboot prompt. Then boot into DIAGS mode:

uboot > bootm 0xE41000

1. Once you're in DIAGS, export the userspace partition:

usb export

1. Transfer rootfs.img to the device.

2. Eject the Kindle from the host PC and exit USB Export mode.

x   ICE-WARIO-WFO-512 - USB EXPORT -  71
   ~~~~  1.16.614.264341  ~~~~ 
     pcbId:04XXXXXXXXXXXX
   USB device exported
    
   Once you are done
   Eject the USB device from the PC then
 
 
   Battery capacity  71
 
(Q)-to continue  
 
(X)-Exit
x

1. Exit diags mode, then drop to a shell.

exit login

1. Flash rootfs.img using Disk Destroyer DD, this will take a while to complete:

[root@[192_168_15_244] root]# dd if=/mnt/us/rootfs.img of=/dev/mmcblk0p1 bs=4096
112500+0 records in
112500+0 records out
460800000 bytes (439.5MB) copied, 95.986967 seconds, 4.6MB/s

1. Reboot the device. It will now boot into the firmware you installed.

reboot

Once you've confirmed that everything works as it should, have fun with your Paperwhite 3 Voyage Edition!