[systemd-bugs] [Bug 51724] New: systemd doesn't deattach my DM devices at shutdown

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=51724

             Bug #: 51724
           Summary: systemd doesn't deattach my DM devices at shutdown
    Classification: Unclassified
           Product: systemd
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
        AssignedTo: systemd-bugs at lists.freedesktop.org
        ReportedBy: reztho at archlinux.us
         QAContact: systemd-bugs at lists.freedesktop.org


I have this partition setup:
├─sda5                 part  /boot
└─sda6                 part  
  └─disk (dm-0)        crypt 
    ├─disk-root (dm-1) lvm   /
    └─disk-home (dm-2) lvm   /home

, which corresponds to a LVM volume group on top of a LUKS partition. This
setup is explained in the archlinux wiki:
https://wiki.archlinux.org/index.php/LUKS#Encrypting_a_LVM_setup

So when I shutdown with systemd, it tells me it cannot detach the dm-0 device.
It tries like 3 times and then just poweroff, showing that there was 2 devices
to detach left. These messages aren't registered in the journal, but they are
similar to the messages of this red hat's bug report:

https://bugzilla.redhat.com/show_bug.cgi?id=657497

I'm using systemd version 185.

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