Quote:
Originally Posted by ixtab
For the Paperwhite, you're essentially right: as there is no known way of getting the device into USB downloader mode, the simple truth is: If the device is *really* bricked, it's bricked for good. If it's "semi-bricked", you may still be able to revive it by booting into diags mode, or by opening it and using the serial port to fiddle with u-boot.
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OTOH, it's very hard to *really* brick PW. It will be "semi-bricked" even with the full erase of
/dev/mmcblk0 from PW's Linux. U-Boot is stored in separate eMMC boot partition. And "eMMC boot pairtiton" has nothing common with the partitions of
/dev/mmcblk0 and stock PW Linux has no access to this boot partition (at least, nor kernel, neither programs in stock KT firmware never access boot partition and it's not available as device node in
/dev). So, I beleive, U-Boot will be always accessible through serial console.
But, of course, after full erasing of
/dev/mmcblk0 on PW one will enter into a great adventure of enormous much of googling with parallel soldering, fiddling with U-Boot, fastboot and Linux internals. Don't try this at home!
At least, Amazon had provided us with official complete rootfs and compiled kernel of 5.3.0...