Quote:
Originally Posted by katadelos
This behaviour is caused by recovery-util, a binary within the initramfs of stock kernels. As you've noticed, it's capable of acting as a secondary update mechanism even when the main OTA update binaries have been removed or otherwise disabled.
The nuclear option of dealing with it is to build your own kernel from the kernel sources - IIRC this doesn't have an noticeable impact on the boot process because the initramfs is optional in the first place and U-Boot passes the rootfs partition to the kernel as part of the command line parameters.
That said, recovery-util can be useful for bootstrapping a borked kindle if you have serial access so it might be worth leaving it in place and using some form of iptables based DNS blocking instead.
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That explains things, thanks for your insight!
I don't think I want to go that far, I'll just check the OTA binaries and make sure that they really are the only way for amazon to download updates.