Comment # 43 on bug 1055641 from Thomas Blume

(In reply to Olli Tuominen from comment #42)
> Created attachment 740630 [details]
> reply for C#41
> 
> dmsetup info

Hm:

Open count: 1
State: ACTIVE

Apparently this is an active logical volume.
I'm not sure whether is the proper way to remove the dm table for an lv without
notifying lvm.
Daniel, do you know why upstream didn't just do a lvchange -an?