Hi Anatoly! Anatoly Pugachev wrote: > current grub2 version does not support compressed image kernels, do > the following: > > gzip -dc /boot/vmlinuz-5.12.0-rc5+ > /boot/vmlinux-5.12.0-rc5+ > rm /boot/vmlinuz-5.12.0-rc5+ > update-grub > > and reboot oh yes, that was it. Finally, I could boot my own built kernel. Which, of course, crashes as expected. At least I can confirm Frank's findings. Riccardo