Jinze Xue wrote:
I want to boot linux without ramdisk. the system have start up successfully, but there are some problems [...]
try this, root=real_device rootfstype=filesystem :
kernel /vmlinuz-3.4.1 root=/dev/sda1 rootfstype=ext4 ..... ^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^ # initrd /initramfs-3.4.1