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Created May 28, 2025 23:04
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Debian 13 (Trixie) cryptsetup at boot fix
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db13cryptfix.md

Debian 13 (Trixie) cryptsetup at boot fix

I'm unsure when this problem started, but installing cryptsetup and cryptsetup-initramfs, adding your partitions to /etc/crypttab, then updating the initramfs with update-initramfs does not work right away. You will reboot and wait 1 minute and 30 second as systemd fails to mount the partition.

I pulled my hair trying to fix this until I extracted the initramfs contents and figured out that Debian's distribution of cryptsetup doesn't read from /etc/crypttab but rather from cryptoroot/crypttab.

You could theoretically make this folder and file, but I suggest writing this tiny script to /etc/initramfs-tools/hooks/make-crypttab, which will entirely solve this problem and for good:

#!/bin/sh
cp /etc/crypttab "${DESTDIR}/cryptroot/crypttab"
exit 0

Don't forget to sudo chmod +x /etc/initramfs-tools/hooks/make-crypttab afterwards to make it executable. Rebuild your initramfs with update-initramfs and you're good to go.

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