Comment # 3 on bug 1171023 from Neil Rickert

I don't normally use "btrfs" here.  I have not had any problems with other
linuxes booting openSUSE on "ext4".

I have experimented with "btrfs".

I first experimented back with openSUSE 13.1, when that was still in beta
testing.  And openSUSE 12.3 had problems with seeing that system using "btrfs".
 And I seem to remember (but not sure of this) that even openSUSE 13.1 had
trouble with seeing another openSUSE 13.1 with "btrfs".

My understanding, which could be wrong, is that part of the problem has to do
with the way that openSUSE uses subvolumes in the "btrfs" system.  And
os-prober might miss the subvolume structure.  However, openSUSE uses
subvolumes the way it does so as to allow booting to an earlier read-only
snapshot.