this post was submitted on 08 Apr 2026
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postmarketOS

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I've been looking through the documentation and installation guides for PostmarketOS, and I've noticed there seems to be no mention of locking the bootloader after flashing.

Is that because there's no issue with doing so, or because you can't?

I'm looking at installing on a Fairphone 5, but anyone with any device that's able to share their experience would be appreciated.

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[–] hornedfiend@piefed.social 1 points 10 hours ago

i think it's simpler than that. It merely stores the latest security update you had when you locked your bootloader and doesn't allow you to rollback to an earlier version,but anything newer - regardless of the ROM being official or eOS/iodΓ© , would allow you to relock it.

TLDR: flashing ROM security patch version > your existing security patch version.