Edge case with udiskie on boot when installed on encrypted sd card

Describe your issue

When booting from encrypted sd card the new udiskie functionality !2905 (closed) is getting a little confused.

What's the expected behaviour?

udiskie should not fire decrypt prompt.

What's the current behaviour?

Upon screen unlock after boot udiskie is there prompting to:

Enter password for /dev/mmcblk0p2

/dev/mmcblk0p2 is the LUKS encrypted root partition already mounted at /

gnome-disk-utility shows it as currently locked.

How to reproduce your issue?

pmbootstrap to sd card with FDE, insert card and boot.

What device are you using?

pine64-pinephone Braveheart with PPBH-MBCE3+32G board replacement

On what postmarketOS version did you encounter the issue?

• edge (master branch)
• v21.12

On what environment did you encounter the issue?

Phone environments

• Phosh
• Plasma Mobile
• Sxmo (Wayland/Sway)

Other

• No environment
• GNOME
• KDE Plasma
• Kodi
• MATE
• Shelli
• Sway
• Weston
• Xfce4
• fbkeyboard
• i3wm
• Sxmo (Xorg/Dwm)

How did you get postmarketOS image?

• from https://images.postmarketos.org
• I built it using pmbootstrap
• It was preinstalled on my device

What's the build date of the image? (in yyyy-mm-dd format)

Additional information

This can be worked around but creating a local config for udiskie by creating the file ~/.conig/udiskie/config.yml with the contents:

device_config:
  - device_file: /dev/mmcblk0p2
    ignore: true

This may be due to how pmOS/alpine/OpenRC does its encryption/mounting and how udiskie detects it as

• lsblk does not show mmcblk0p2 as having a mount point,
• mount showing /dev/mapper/root on / type ext4 (rw, relatime) but /dev/mapper/root is non-existant