I'm not a kernel developer, but I tried to bisect. However after: make make install grub2-mkconfig -o /boot/grub2/grub.cfg and reboot I was not able to start that kernel it crashed. Also 'make install' told me I need a initrd ... So did make make install make modules_install mkinitrd Now even a normal SUSE kernel doesn't boot anymore. Please provide better instructions. I'm going to try to fix my system now ...