Sorry, kernel-install failed. My error! zypper install kernel-default-5.14.21-150500.1.1.g8d27c97.x86_64.rpm zypper install kernel-default-extra-5.14.21-150500.1.1.g8d27c97.x86_64.rpm zypper install kernel-default-optional-5.14.21-150500.1.1.g8d27c97.x86_64.rpm 1. are this the required packages? 2. how to handle "force-install" by --oldpackage without packagename for oldpackage? 3. choose the kernel in GRUB menu edit /boot/grub2/grub.cfg ? The are a command for it ? In yast -> bootloader i found nothing