I uesd the "K5 KindleBreak JailBreak (5.10.3 - 5.13.3)" from the snapshot thread (
https://www.mobileread.com/forums/sh...d.php?t=225030).
It was the newest I could find ("2021-Nov-15"), however i did use the files from "kindle-5.4-jailbreak.zip", not the Update*.bin files.
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Something I noticed is that /etc/profile does not seem to get sourced, so e.g. DISPLAY is unset. I don't know if that changed in 5.12, but I think some years ago DISPLAY got set.
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Btw, I think the kindle resetted my settings (or maybe "just" appreg.db), so kual failed to start ("Application Error, The selected application could not be started").
I tried to reinstall the kual-hotfix-update, but UYK stayed gray this time. Is it because its versioned and it knows it already installed this update?
I also wonder if there is a (quick) way to manually (from serial/ssh) install Update*.bin files?
One way I found is to extract the .bin file, and run the install.sh file.
I guess OTA packages always have such an install.sh script, right?