### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below

## DO NOT UNCOMMENT THEM, Just edit them to your needs

その上部分をちゃんと読もうよ。
uncommentせずにオプションを編集して、update-grubで反映させるのがdebianの作法。