MobileRead Forums - View Single Post - How to downgrade JAILBROKEN 5.8.9.2 to factory initial.

coplate · 11-23-2017, 09:15 PM

So, I re-flashed just the 'android ' bootloader from my kindle oasis, from when it was shipped. This is letting me do the downgrade with the 'reboot without unplugging' method.

Code:

$ file mmcblk2p1.img
mmcblk2p1.img: Android bootimg, kernel, ramdisk, second stage, page size: 2048

Again, this only works if you have already made this image of your device. I have no idea what is in this partition - in terms of hardware specific date - but this is the partition that has the actual installers in it that installs when you reboot.

In the 5.9.2 package, there is a boot.img that has the same file type listed, I would suppose that is the one that replaces it.

It did the progress bar, showing it installing. but then on the tree screen, it showed the bridge code running, which I don't remember from previos goes of downgrading my PW3.

It also installed a lot faster than I remember the factory image installing.

the Version # does show this factory version number

for paperwhite 3 and earlier, there have been similar instrucations, though I cannot find them.

I know there is a specific partition that has the kernel image in it, and I believe that kerenl has the update-installer in it, so you have to have backed that up properly, and re-flash it.

11-23-2017, 09:15 PM	#28
coplate Guru Posts: 645 Karma: 1888888 Join Date: Jun 2009 Device: prs-505, Kindle Keyboard 3g, PW3	So, I re-flashed just the 'android ' bootloader from my kindle oasis, from when it was shipped. This is letting me do the downgrade with the 'reboot without unplugging' method. Code: $ file mmcblk2p1.img mmcblk2p1.img: Android bootimg, kernel, ramdisk, second stage, page size: 2048 Again, this only works if you have already made this image of your device. I have no idea what is in this partition - in terms of hardware specific date - but this is the partition that has the actual installers in it that installs when you reboot. In the 5.9.2 package, there is a boot.img that has the same file type listed, I would suppose that is the one that replaces it. It did the progress bar, showing it installing. but then on the tree screen, it showed the bridge code running, which I don't remember from previos goes of downgrading my PW3. It also installed a lot faster than I remember the factory image installing. the Version # does show this factory version number for paperwhite 3 and earlier, there have been similar instrucations, though I cannot find them. I know there is a specific partition that has the kernel image in it, and I believe that kerenl has the update-installer in it, so you have to have backed that up properly, and re-flash it. Last edited by coplate; 11-23-2017 at 09:23 PM.