Tails does not boot from USB when installed with Tails Installer on recent Debian testing/sid system

If I select that device on a ThinkPad T430 with EFI disabled and press enter, then I see a black screen for 2 seconds and then I’m back to the BIOS’ boot menu. Reproduced both with a device installed from ISO with Tails Installer 5.0.1+dfsg-0tails1 on Debian sid, and with one cloned from a running Tails/Buster DVD.

The system partition hasn’t the correct type, it’s not an ESP and is not flagged “legacy BIOS bootable”. Looks like the recent udisks2 updates broke our stuff.

Feature Branch: bugfix/14809-partition-type-and-flags-with-recent-udisks, installer:bugfix/14809-partition-type-and-flags-with-recent-udisks

Related issues

Related to #14813 (closed)

Original created by @intrigeri on 14809 (Redmine)

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