커널 시작이 실패하는 이유는 무엇입니까?

Ubuntu 12.04(커널 3.2.0-53)가 설치된 시스템에서 3.11.1 커널 이미지로 부팅하려고 합니다.

그런 다음 컴파일 make defconfig하고 이미지를 넣은 다음 /bootGRUB를 업데이트하고 재부팅합니다.

다시 시작하면 다음 메시지가 나타납니다.

EXT4-fs (sda1) : couldnt mount as ext3 due to feature incompatibilities
EXT4-fs (sda1) : couldnt mount as ext2 due to feature incompatibilities
init : unable to create device: /dev/kmsg
Root filesystem check failed

무엇이 잘못되었나요?

커널이 파일 시스템이 ext4라는 것을 알고 있다면(나는 그럴 것이라고 가정합니다) EXT4-fs (sda1), 왜 ext3/2로 마운트됩니까?

---

/etc/fstab:

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    nodev,noexec,nosuid 0       0
# / was on /dev/sda1 during installation
UUID=7be51edc-99ae-4e6e-b863-2bef9e4adb22 /               ext4    errors=remount-ro 0       1
# /home was on /dev/sda4 during installation
UUID=e4b936e5-e1c5-4146-9710-03b0d6dfdea2 /home           ext4    defaults        0       2
# swap was on /dev/sda3 during installation
UUID=10d012d1-bbba-43f4-8e8a-8aa493435acb none            swap    sw              0       0

# Move /tmp to RAM
tmpfs /tmp tmpfs defaults,noexec,nosuid 0 0

---

grub.cfg이미지 항목:

menuentry 'Ubuntu, with Linux 3.11.1' --class ubuntu --class gnu-linux --class gnu --class os {
    recordfail
    gfxmode $linux_gfx_mode
    insmod gzio
    insmod part_msdos
    insmod ext2
    set root='(hd0,msdos1)'
    search --no-floppy --fs-uuid --set=root 7be51edc-99ae-4e6e-b863-2bef9e4adb22
    linux   /boot/vmlinuz-3.11.1 root=/dev/sda1 ro   quiet splash $vt_handoff
}
menuentry 'Ubuntu, with Linux 3.11.1 (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
    recordfail
    insmod gzio
    insmod part_msdos
    insmod ext2
    set root='(hd0,msdos1)'
    search --no-floppy --fs-uuid --set=root 7be51edc-99ae-4e6e-b863-2bef9e4adb22
    echo    'Loading Linux 3.11.1 ...'
    linux   /boot/vmlinuz-3.11.1 root=/dev/sda1 ro recovery nomodeset 
}