[pkg-cryptsetup-devel] Bug#644082: Encrypted filesystem sometimes fails to unmount in gnome desktop

[Bernhard]

Package: cryptsetup
Version: 1.3.0-3
Severity: normal

I have encrypted my USB Stick with CryptSetup and LUKS.
It works perfectly.

If i try to mount the USB Stick, the gnome desktop environment asks for the Passphrase.
This works, i have access to the filesystem.

At next, i have unmounted the USB Stick.
During unmounting, sometimes a window is shown with the following message (german):
"Auswerfen von 509 MB Filesystem nicht möglich. Medium konnte nicht ausgeworfen werden. Ein oder mehr Speicherorte auf dem Medium sind noch aktiv".
Translated into english:
"Unmounting of 509 MB Filesystem not possible. Medium can't be unmounted. One or more storage places of the medium are active".
This is, even though no file was opened on the filesystem.
I have only mounted and unmounted the encrypted filesystem.

I have investigated the problem with the tool lsof.
Result were two additional tasks which possibly holds the filesystem:
- scsi_eh_5
- usb-storage

If you need additional informations, please let me know.
This behaviour is reproducable on my computer.

Best regards
Bernhard
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