Created attachment 740825 [details]
zypper history

When a ?kernel? update is installed, then grub config contains only updated
Linux kernel menu entries and doesn't contain other operating systems (like
Windows). 

I have to run `update-bootloader` to show Windows menu entry again after each
update.

$ os-prober
/dev/sda1:Windows 10:Windows:chain

$ awk -F\' '/menuentry / {print $2}' /boot/grub2/grub.cfg 
snapper rollback
openSUSE Tumbleweed
openSUSE Tumbleweed, with Linux 4.13.1-1-default
openSUSE Tumbleweed, with Linux 4.13.1-1-default (recovery mode)
openSUSE Tumbleweed, with Linux 4.12.9-1-default
openSUSE Tumbleweed, with Linux 4.12.9-1-default (recovery mode)
openSUSE Tumbleweed, with Linux 4.12.8-1-default
openSUSE Tumbleweed, with Linux 4.12.8-1-default (recovery mode)

$ tail /var/log/zypp/history 
...
# 2017-09-16 20:09:52 Output of coreutils-8.28-1.1.x86_64.rpm %posttrans
script:
...
#     dracut: *** Stripping files done ***
#     dracut: *** Generating early-microcode cpio image ***
#     dracut: *** Constructing GenuineIntel.bin ****
#     dracut: *** Store current command line parameters ***
#     dracut: Stored kernel commandline:
#     dracut:  resume=UUID=40a8ae32-0e87-481e-a6de-daf4ade846c5
#     dracut:  root=UUID=0a0237c4-32ba-4f2f-9e56-e1fea26f51a8 rootfstype=btrfs
rootflags=rw,relatime,ssd,space_cache,subvolid=259,subvol=/@/.snapshots/1/snapshot,subvol=@/.snapshots/1/snapshot
#     dracut: *** Creating image file '/boot/initrd-4.13.1-1-default' ***
#     dracut: *** Creating initramfs image file '/boot/initrd-4.13.1-1-default'
done ***
#     Did not refresh the bootloader. You might need to refresh it manually.

$ grub2-install --version
grub2-install (GRUB2) 2.02

After running `update-bootloader` everything is fine ;-) So it looks like some
update scripts don't contain `update-bootloader` call.

$ awk -F\' '/menuentry / {print $2}' /boot/grub2/grub.cfg 
snapper rollback
openSUSE Tumbleweed
openSUSE Tumbleweed, with Linux 4.13.1-1-default
openSUSE Tumbleweed, with Linux 4.13.1-1-default (recovery mode)
openSUSE Tumbleweed, with Linux 4.12.9-1-default
openSUSE Tumbleweed, with Linux 4.12.9-1-default (recovery mode)
openSUSE Tumbleweed, with Linux 4.12.8-1-default
openSUSE Tumbleweed, with Linux 4.12.8-1-default (recovery mode)
Windows 10 (on /dev/sda1)