Works fine. But with every kernel update (with zypper up) i have to redo the grub2-mkconfig command. Is there a possibility that zypper does it automatically?
Zypper calls bootloader utils which refresh current bootloader configuration. Where “current” is whatever is defined in /etc/sysconfig/bootloader. You need to switch to grub2 via YaST2.
i’ve changed to grub2
You did not change to grub2. You remained with grub as primary bootloader, and grub2 is simply one of bootloader options.