[Bug 50419] Can't umount LUKS partitions

[Nikolaus Rath]

Public bug reported:

I'm unable to umount LUKS partitions from removable media. Right-
clicking on the volume on the desktop and selecting "Unmount" fails with
"..is not in /etc/fstab and you are not root". Calling pumount manually
works fine. Note that the menu entry is named "Unmount" and not "Eject",
as for the unencrypted partitions.

** Affects: gnome-volume-manager (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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Can't umount LUKS partitions
https://launchpad.net/bugs/50419