我最近在装有 Windows 8 的分区上安装了 ubuntu 13，但我无法返回 Windows 加载器。当我选择 Windows 8 时，出现错误“签名无效”。但是 ubuntu 运行正常。
我已经在互联网上搜索并使用 os-proper 测试了解决方案，但没有任何改变：
:~$ sudo os-prober
grub-probe: error: unknown filesystem.
/dev/sda1:Windows 8 (loader):Windows:chain
:~$ sudo update-grub
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-3.8.0-27-generic
Found initrd image: /boot/initrd.img-3.8.0-27-generic
Found linux image: /boot/vmlinuz-3.8.0-26-generic
Found initrd image: /boot/initrd.img-3.8.0-26-generic
Found linux image: /boot/vmlinuz-3.8.0-19-generic
Found initrd image: /boot/initrd.img-3.8.0-19-generic
Found memtest86+ image: /boot/memtest86+.bin
grub-probe: error: unknown filesystem.
Found Windows 8 (loader) on /dev/sda1
/usr/sbin/grub-probe: error: unknown filesystem.
done
有关配置的更多详细信息：
~$ sudo fdisk -l
Disk /dev/sda: 750.2 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x3f78334c
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 715057151 357527552 7 HPFS/NTFS/exFAT
/dev/sda2 715059200 1151722887 218331844 7 HPFS/NTFS/exFAT
/dev/sda3 1151723518 1465147391 156711937 5 Extended
Partition 3 does not start on physical sector boundary.
/dev/sda5 1151723520 1452771327 150523904 83 Linux
/dev/sda6 1452773376 1465147391 6187008 82 Linux swap / Solaris
提前致谢。
编辑1： ~$ cat /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
set default="0"
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}
if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_msdos
insmod ext2
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 c516a53f-bfa3-4140-8a30-18967123caa2
else
search --no-floppy --fs-uuid --set=root c516a53f-bfa3-4140-8a30-18967123caa2
fi
font="/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=fr_FR
insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ]; then
set timeout=-1
else
set timeout=10
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
if background_color 44,0,30; then
clear
fi
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
set gfxpayload="${1}"
if [ "${1}" = "keep" ]; then
set vt_handoff=vt.handoff=7
else
set vt_handoff=
fi
}
if [ "${recordfail}" != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-c516a53f-bfa3-4140-8a30-18967123caa2' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 c516a53f-bfa3-4140-8a30-18967123caa2
else
search --no-floppy --fs-uuid --set=root c516a53f-bfa3-4140-8a30-18967123caa2
fi
linux /boot/vmlinuz-3.8.0-27-generic root=UUID=c516a53f-bfa3-4140-8a30-18967123caa2 ro quiet splash $vt_handoff
initrd /boot/initrd.img-3.8.0-27-generic
}
submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-c516a53f-bfa3-4140-8a30-18967123caa2' {
menuentry 'Ubuntu, with Linux 3.8.0-27-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.8.0-27-generic-advanced-c516a53f-bfa3-4140-8a30-18967123caa2' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 c516a53f-bfa3-4140-8a30-18967123caa2
else
search --no-floppy --fs-uuid --set=root c516a53f-bfa3-4140-8a30-18967123caa2
fi
echo 'Loading Linux 3.8.0-27-generic ...'
linux /boot/vmlinuz-3.8.0-27-generic root=UUID=c516a53f-bfa3-4140-8a30-18967123caa2 ro quiet splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.8.0-27-generic
}
menuentry 'Ubuntu, with Linux 3.8.0-27-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.8.0-27-generic-recovery-c516a53f-bfa3-4140-8a30-18967123caa2' {
recordfail
load_video
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 c516a53f-bfa3-4140-8a30-18967123caa2
else
search --no-floppy --fs-uuid --set=root c516a53f-bfa3-4140-8a30-18967123caa2
fi
echo 'Loading Linux 3.8.0-27-generic ...'
linux /boot/vmlinuz-3.8.0-27-generic root=UUID=c516a53f-bfa3-4140-8a30-18967123caa2 ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.8.0-27-generic
}
menuentry 'Ubuntu, with Linux 3.8.0-26-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.8.0-26-generic-advanced-c516a53f-bfa3-4140-8a30-18967123caa2' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 c516a53f-bfa3-4140-8a30-18967123caa2
else
search --no-floppy --fs-uuid --set=root c516a53f-bfa3-4140-8a30-18967123caa2
fi
echo 'Loading Linux 3.8.0-26-generic ...'
linux /boot/vmlinuz-3.8.0-26-generic root=UUID=c516a53f-bfa3-4140-8a30-18967123caa2 ro quiet splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.8.0-26-generic
}
menuentry 'Ubuntu, with Linux 3.8.0-26-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.8.0-26-generic-recovery-c516a53f-bfa3-4140-8a30-18967123caa2' {
recordfail
load_video
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 c516a53f-bfa3-4140-8a30-18967123caa2
else
search --no-floppy --fs-uuid --set=root c516a53f-bfa3-4140-8a30-18967123caa2
fi
echo 'Loading Linux 3.8.0-26-generic ...'
linux /boot/vmlinuz-3.8.0-26-generic root=UUID=c516a53f-bfa3-4140-8a30-18967123caa2 ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.8.0-26-generic
}
menuentry 'Ubuntu, with Linux 3.8.0-19-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.8.0-19-generic-advanced-c516a53f-bfa3-4140-8a30-18967123caa2' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 c516a53f-bfa3-4140-8a30-18967123caa2
else
search --no-floppy --fs-uuid --set=root c516a53f-bfa3-4140-8a30-18967123caa2
fi
echo 'Loading Linux 3.8.0-19-generic ...'
linux /boot/vmlinuz-3.8.0-19-generic root=UUID=c516a53f-bfa3-4140-8a30-18967123caa2 ro quiet splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.8.0-19-generic
}
menuentry 'Ubuntu, with Linux 3.8.0-19-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.8.0-19-generic-recovery-c516a53f-bfa3-4140-8a30-18967123caa2' {
recordfail
load_video
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 c516a53f-bfa3-4140-8a30-18967123caa2
else
search --no-floppy --fs-uuid --set=root c516a53f-bfa3-4140-8a30-18967123caa2
fi
echo 'Loading Linux 3.8.0-19-generic ...'
linux /boot/vmlinuz-3.8.0-19-generic root=UUID=c516a53f-bfa3-4140-8a30-18967123caa2 ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.8.0-19-generic
}
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod part_msdos
insmod ext2
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 c516a53f-bfa3-4140-8a30-18967123caa2
else
search --no-floppy --fs-uuid --set=root c516a53f-bfa3-4140-8a30-18967123caa2
fi
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 c516a53f-bfa3-4140-8a30-18967123caa2
else
search --no-floppy --fs-uuid --set=root c516a53f-bfa3-4140-8a30-18967123caa2
fi
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows 8 (loader) (on /dev/sda1)' --class windows --class os $menuentry_id_option 'osprober-chain-/dev/sda1' {
insmod ldm
drivemap -s (hd0) ${root}
chainloader +1
}
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/30_uefi-firmware ###
### END /etc/grub.d/30_uefi-firmware ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
编辑2：
**~$sudo mount /dev/sda1 /mnt**
**~$ sudo umount /mnt**
没问题