Comment # 6 on bug 957018 from Wolfgang Rosenauer

(In reply to Michael Chang from comment #5)
> Well, we have three different installs on btrfs "default".
> 
> 1. openSUSE 13.2 to topmost root tree (ie /)
> 2. SLE12 to subvolume (ie /@)
> 3. openSUSE Leap, tumbleweed to the snapshot (ie /@/.snapshots/1/snapshot)

I'm confused what this means. I don't have any other installation in
subvolumes.
What broke for me is Linux detection on completely different partitions:

/dev/sda1      2048    321535    319488   156M EFI System
/dev/sda2    321536   8708095   8386560     4G Microsoft basic data
/dev/sda3   8708096  50653183  41945088    20G Microsoft basic data
/dev/sda4  50653184  92598271  41945088    20G Microsoft basic data
/dev/sda5  92598272 976752639 884154368 421,6G Microsoft basic data

sda3 is a Leap 42.1
sda4 is a 13.2

The os-prober on Leap 42.1 does not detect the 13.2 installation on sda4.
Both installations are on btrfs:
/dev/sda4 on / type btrfs (rw,relatime,ssd,space_cache)
/dev/sda4 / is no subvolume
/dev/sda3 / is no subvolume