Comment 47 for bug 88213

This problem is still present. When using gnome-mount, it works everytime (mounting/unmounting/mounting...). But when using nautilus, it sometimes can't be remounted whether with nautilus or gnome-mount after first unmounting. When this occurs, the label of the encrypted disc remains visible in nautilus, and in hal-manager (I mean the cleartext volume still appears), though the luks_crypto mapping has already disappeared. It seems to be the root of the subsequent problems: nautilus tries (through hal) to mount directly without remapping because it sees the cleartext volume listed in hal. When trying to unmount with nautilus, it fails again because it is already unmounted. When trying to teardown (using dbus-send), it fails again because the cryptsetup command used by hal to unmap the cleartext volume fails (quite understandably since there is no mapping at the time).

Using dbus-send commands, I can get things in order by calling the Volume.Crypto.Setup method. I then follow with Volume.Crypto.Teardown to destroy the mapping completely and it works correctly thereafter (until of course I mount and then unmount with nautilus, which leads to the same situation).

It seems that there is some kind of race condition because when I call Volume.Unmount followed by Volume.Crypto.Teardown rapidly, the exact same problem as with nautilus occurs. On the contrary, if I wait ten seconds between my two dbus-send commands, it works perfectly.

For reference, I used these commands:
dbus-send --print-reply --system --dest=org.freedesktop.Hal '/org/freedesktop/Hal/devices/volume_uuid_my_encrypted_partition_uuid' org.freedesktop.Hal.Device.Volume.Crypto.Setup string:'my passphrase'
dbus-send --print-reply --system --dest=org.freedesktop.Hal '/org/freedesktop/Hal/devices/volume_uuid_my_encrypted_partition_uuid' org.freedesktop.Hal.Device.Volume.Crypto.Teardown
dbus-send --print-reply --system --dest=org.freedesktop.Hal '/org/freedesktop/Hal/devices/volume_uuid_my_cleartext_mapping_uuid' org.freedesktop.Hal.Device.Volume.Mount string:'mymediamountpoint' string:'auto' array:string:''
dbus-send --print-reply --system --dest=org.freedesktop.Hal '/org/freedesktop/Hal/devices/volume_uuid_my_cleartext_mapping_uuid' org.freedesktop.Hal.Device.Volume.Unmount array:string:''

I didn't fully understand the way the /usr/lib/hal/scripts/luks-* and /usr/lib/halt/scripts/linux/luks-* scripts work, so I am unable so far to propose a correction. I hope that these indications will help you to correct this problem.

Cordially.