Quote:
Originally Posted by e-ghost
If I follow this step to upgrade my DXG from 3.2.1 to 3.4.2, will I still able to fallback to 3.2.1 or 2.5.8 (by previous backup) in case I have problem with 3.4.2?
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Be sure to save the backup rootfs.img files needed for the recovery. They are a copy of the entire mmcblk0p1 and can be re-flashed following the instructions of Yifan Lu for using the recovery kernel in the kindleupdater.zip. I have never needed to do this so I hope everything works. I have recently given this a lot of thought and decided I didn't really need the 3G browsing nor to wear out my 5way cursor pad so did not upgrade to 3.4.2.
You should now have a rootfs.img for the 2.5.8 and a rootfs.img for the 3.2.1. Then you follow the instructions for the recovery kernel to get into the recovery download mode and flash the rootfs.img back onto the mmcblk0p1.
Be careful not to change the Yifan Lu recovery kernel made for the DX when installing files made for the K3 kernel. Do not install the K3 kernel instead of the DX recovery kernel. That could make returning to the 3.2.1 or 2.5.8 more difficult. There are a few other files needed by the DX that should not be changed when using the K3 updates like the 3G Wan files for example. You should follow the instructions given by newman in his original post for this thread to avoid any problems. You can look inside Yifan Lu's kindleupdate to see the files he decided to avoid upgrading when applying the 3.1 programs to the 2.5.8 OS.