[ubuntu] New kernel didn't launch

Hi.

I compiled a new keel for my ARM computer because I needed to change some configs. It's a Utilite Board, that has his own keel.

I cloned the right version from git:

git clone ...

make cm_fx6_defconfig
nano .config

make -j4 zImage dtbs modules

sudo cp ./arch/arm/boot/zImage ./arch/arm/boot/dts/*.dtb /media/bootsudo make modules_install
sudo make firmware_install
sudo make headers_install INSTALL_HDR_PATH=/usr

I have no GRUB on this computer, and I couldn't install, nor GRUB CUSTOMIZER.

Do you have any tip that could help me with this?