我最近在华硕 Vivo 笔记本电脑上安装了 Ubuntu 18.04 和 Windows 10。加载正确。昨天我通过手动创建分区安装了 Ubuntu 20.04。安装过程很顺利，但重启时，grub 不会加载 Ubuntu 20.04，而是显示一个终端。我尝试通过实时 USB 进行 Boot-Repair，但没有成功。
这里有一个链接启动修复报告。
============================== Boot Info Summary ===============================
=> No boot loader is installed in the MBR of /dev/sda.
=> Syslinux MBR (3.61-4.03) is installed in the MBR of /dev/sdb.
sda1: __________________________________________________________________________
File system: vfat
Boot sector type: Windows 8/2012: FAT32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
sda2: __________________________________________________________________________
File system:
Boot sector type: -
Boot sector info:
sda3: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 8/2012: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows 10
Boot files:
sda4: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 8/2012: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
sda5: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 8/2012: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
sda6: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 8/2012: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
sda7: __________________________________________________________________________
File system: swap
Boot sector type: -
Boot sector info:
sda8: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 20.04 LTS
Boot files: /etc/fstab /etc/default/grub
sda9: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System:
Boot files:
sdb1: __________________________________________________________________________
File system: vfat
Boot sector type: SYSLINUX 4.03 2010-10-22 ........>..sr>........p.8...0...~.....~...f...M.f.f....f..0~....>E}.u......
Boot sector info: Syslinux looks at sector 7856530 of /dev/sdb1 for its
second stage. SYSLINUX is installed in the directory.
The integrity check of the ADV area failed. No errors
found in the Boot Parameter Block.
Operating System:
Boot files: /boot/grub/grub.cfg /syslinux.cfg
/efi/BOOT/grubx64.efi /efi/BOOT/mmx64.efi /ldlinux.sys
================================ 1 OS detected =================================
OS#1: Windows 10 on sda3
============================ Architecture/Host Info ============================
CPU architecture: 64-bit
Live-session OS is Ubuntu 64-bit (Ubuntu 20.04 LTS, focal, x86_64)
===================================== UEFI =====================================
BIOS is EFI-compatible, and is setup in EFI-mode for this live-session.
SecureBoot disabled.
efibootmgr -v
BootCurrent: 0003
Timeout: 1 seconds
BootOrder: 0002,0000,0003
Boot0000* Windows Boot Manager HD(1,GPT,a79d2df9-4212-47e0-b432-fbbf1fafc664,0x800,0x82000)/File(\EFI\MICROSOFT\BOOT\BOOTMGFW.EFI)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...})...............
Boot0002* ubuntu HD(1,GPT,a79d2df9-4212-47e0-b432-fbbf1fafc664,0x800,0x82000)/File(\EFI\UBUNTU\SHIMX64.EFI)
Boot0003* UEFI: hp v236w 0009, Partition 1 PciRoot(0x0)/Pci(0x15,0x0)/USB(2,0)/HD(1,MBR,0xfc5c173b,0x800,0x1ce7800)..BO
============================= Drive/Partition Info =============================
Disks info: ____________________________________________________________________
sda : is-GPT, no-BIOSboot, has---ESP, not-usb, not-mmc, has-os, 2048 sectors * 512 bytes
Partitions info (1/3): _________________________________________________________
sda1 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far
sda3 : is-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
sda4 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
sda5 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
sda6 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
sda8 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
sda9 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
Partitions info (2/3): _________________________________________________________
sda1 : is---ESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
sda3 : isnotESP, part-has-no-fstab, no-nt, haswinload, no-recov-nor-hid, no-bmgr, notwinboot
sda4 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
sda5 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
sda6 : isnotESP, part-has-no-fstab, no-nt, no-winload, recovery-or-hidden, no-bmgr, notwinboot
sda8 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
sda9 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
Partitions info (3/3): _________________________________________________________
sda1 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
sda3 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
sda4 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
sda5 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
sda6 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
sda8 : maybesepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
sda9 : maybesepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
fdisk -l (filtered): ___________________________________________________________
Disk sda: 931.53 GiB, 1000204886016 bytes, 1953525168 sectors
Disk identifier: E28396D1-E1AC-4593-89BB-922C4A46F666
Start End Sectors Size Type
sda1 2048 534527 532480 260M EFI System
sda2 534528 567295 32768 16M Microsoft reserved
sda3 567296 297527295 296960000 141.6G Microsoft basic data
sda4 848977920 1400428543 551450624 263G Microsoft basic data
sda5 1400428544 1951883263 551454720 263G Microsoft basic data
sda6 1951885312 1953523711 1638400 800M Windows recovery environment
sda7 832976896 848977919 16001024 7.6G Linux swap
sda8 297527296 337526783 39999488 19.1G Linux filesystem
sda9 337526784 477526015 139999232 66.8G Linux filesystem
Partition table entries are not in disk order.
Disk sdb: 14.46 GiB, 15518924800 bytes, 30310400 sectors
Disk identifier: 0xfc5c173b
Boot Start End Sectors Size Id Type
sdb1 * 2048 30310399 30308352 14.5G b W95 FAT32
parted -lm (filtered): _________________________________________________________
sda:1000GB:scsi:512:4096:gpt:ATA TOSHIBA MQ04ABF1:;
1:1049kB:274MB:273MB:fat32:EFI system partition:boot, esp;
2:274MB:290MB:16.8MB::Microsoft reserved partition:msftres;
3:290MB:152GB:152GB:ntfs:Basic data partition:msftdata;
8:152GB:173GB:20.5GB:ext4::;
9:173GB:244GB:71.7GB:ext4::;
7:426GB:435GB:8193MB:linux-swap(v1)::swap;
4:435GB:717GB:282GB:ntfs:Basic data partition:msftdata;
5:717GB:999GB:282GB:ntfs:Basic data partition:msftdata;
6:999GB:1000GB:839MB:ntfs:Basic data partition:hidden, diag;
sdb:15.5GB:scsi:512:512:msdos:hp v236w:;
1:1049kB:15.5GB:15.5GB:fat32::boot;
blkid (filtered): ______________________________________________________________
NAME FSTYPE UUID PARTUUID LABEL PARTLABEL
sda
├─sda1 vfat 9683-38A0 a79d2df9-4212-47e0-b432-fbbf1fafc664 SYSTEM EFI system partition
├─sda2 b09a32e4-70bc-479b-b134-b0645eeca389 Microsoft reserved partition
├─sda3 ntfs DEA0857AA0855A43 f3bd20b9-ff5b-4698-85bb-700a06cee016 OS Basic data partition
├─sda4 ntfs C854CA8154CA71AC 7d899b33-1d27-41f0-b6ee-e696916a0ca0 Basic data partition
├─sda5 ntfs FE1AD14B1AD10217 74b3171d-e99f-469f-af9a-e9a8f8ec8fda Basic data partition
├─sda6 ntfs EEA08356A0832465 dc37e61c-33cb-459e-ad5a-8617fa3df6f8 RECOVERY Basic data partition
├─sda7 swap 455b66d3-da04-437d-9f42-b599b2a26cba d765f7e4-7d19-4238-8668-9c550fab6f02
├─sda8 ext4 5323d7bc-4339-4c44-86bf-8ff4d879e0f6 e7909a77-09ea-4628-8a33-c728d3142fe0
└─sda9 ext4 48ec757e-c739-4b5d-813f-0fe5642a4833 a8864d61-190f-4dd5-aa65-0e7ff597f47d
sdb
└─sdb1 vfat 7DBB-1403 fc5c173b-01 TWINCY
df (filtered): _________________________________________________________________
Avail Use% Mounted on
sda1 /mnt/boot-sav/sda8/boot/efi
sda3 51.4G 64% /mnt/boot-sav/sda3
sda4 /mnt/boot-sav/sda4
sda5 /mnt/boot-sav/sda5
sda6 /mnt/boot-sav/sda6
sda8 13.1G 25% /mnt
sda8 /mnt/boot-sav/sda8
sda9 /mnt/boot-sav/sda8/boot
sdb1 10.7G 26% /cdrom
Mount options: __________________________________________________________________
sda1 rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro
sda3 rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sda4 rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sda5 rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sda6 rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sda8 rw,relatime
sda8 rw,relatime
sda9 rw,relatime
sdb1 ro,noatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro
========================== sda8/etc/fstab (filtered) ===========================
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda8 during installation
UUID=5323d7bc-4339-4c44-86bf-8ff4d879e0f6 / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda1 during installation
# /home was on /dev/sda9 during installation
UUID=48ec757e-c739-4b5d-813f-0fe5642a4833 /home ext4 defaults 0 2
# swap was on /dev/sda7 during installation
UUID=455b66d3-da04-437d-9f42-b599b2a26cba none swap sw 0 0
UUID=48ec757e-c739-4b5d-813f-0fe5642a4833 /boot ext4 defaults 0 2
UUID=9683-38A0 /boot/efi vfat defaults 0 1
======================= sda8/etc/default/grub (filtered) =======================
GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""
==================== sda8: Location of files loaded by Grub ====================
GiB - GB File Fragment(s)
143.606441498 = 154.196242432 boot/vmlinuz 2
143.606441498 = 154.196242432 boot/vmlinuz-5.4.0-26-generic 2
158.175811768 = 169.839984640 boot/vmlinuz-5.4.0-26-generic.efi.signed 1
143.606441498 = 154.196242432 boot/vmlinuz.old 2
===================== sda8: ls -l /etc/grub.d/ (filtered) ======================
-rwxr-xr-x 1 root root 17123 Apr 15 11:31 10_linux
-rwxr-xr-x 1 root root 42128 Apr 15 11:31 10_linux_zfs
-rwxr-xr-x 1 root root 12894 Apr 15 11:31 20_linux_xen
-rwxr-xr-x 1 root root 12059 Apr 15 11:31 30_os-prober
-rwxr-xr-x 1 root root 1424 Apr 15 11:31 30_uefi-firmware
-rwxr-xr-x 1 root root 214 Apr 15 11:31 40_custom
-rwxr-xr-x 1 root root 216 Apr 15 11:31 41_custom
====================== sdb1/boot/grub/grub.cfg (filtered) ======================
Ubuntu
Ubuntu (safe graphics)
OEM install (for manufacturers)
Boot from next volume
UEFI Firmware Settings
========================= sdb1/syslinux.cfg (filtered) =========================
default menu.c32
prompt 0
menu title UNetbootin
timeout 100
label unetbootindefault
menu label Default
kernel /ubnkern
append initrd=/ubninit file=/cdrom/preseed/ubuntu.seed quiet splash ---
label ubnentry0
menu label ^Help
kernel /ubnkern
append initrd=/ubninit
label ubnentry1
menu label ^Try Ubuntu without installing
kernel /casper/vmlinuz
append initrd=/casper/initrd file=/cdrom/preseed/ubuntu.seed quiet splash ---
label ubnentry2
menu label ^Try Ubuntu without installing (safe graphics)
kernel /casper/vmlinuz
append initrd=/casper/initrd file=/cdrom/preseed/ubuntu.seed quiet splash nomodeset ---
label ubnentry3
menu label ^Install Ubuntu
kernel /casper/vmlinuz
append initrd=/casper/initrd file=/cdrom/preseed/ubuntu.seed only-ubiquity quiet splash ---
label ubnentry4
menu label ^Install Ubuntu (safe graphics)
kernel /casper/vmlinuz
append initrd=/casper/initrd file=/cdrom/preseed/ubuntu.seed only-ubiquity quiet splash nomodeset ---
label ubnentry5
menu label Test ^memory
kernel /install/mt86plus
append initrd=/ubninit
label ubnentry6
menu label ^Boot from first hard disk
kernel /ubnkern
append initrd=/ubninit
label ubnentry7
menu label Ubuntu
kernel /casper/vmlinuz
append initrd=/casper/initrd file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
label ubnentry8
menu label Ubuntu (safe graphics)
kernel /casper/vmlinuz
append initrd=/casper/initrd file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash nomodeset ---
label ubnentry9
menu label OEM install (for manufacturers)
kernel /casper/vmlinuz
append initrd=/casper/initrd file=/cdrom/preseed/ubuntu.seed only-ubiquity quiet splash oem-config/enable=true ---
==================== sdb1: Location of files loaded by Grub ====================
GiB - GB File Fragment(s)
?? = ?? boot/grub/grub.cfg 1
================== sdb1: Location of files loaded by Syslinux ==================
GiB - GB File Fragment(s)
?? = ?? syslinux.cfg 1
?? = ?? ldlinux.sys 1
?? = ?? menu.c32 1
=============== sdb1: Version of COM32(R) files used by Syslinux ===============
menu.c32 : COM32R module (v4.xx)
=============================== StdErr Messages ================================
/usr/share/boot-sav/b-i-s-functions.sh: line 2168: cd: /mnt/boot-sav/sda8/boot/efi/: No such file or directory
/usr/share/boot-sav/b-i-s-functions.sh: line 2168: cd: /mnt/boot-sav/sda4/: No such file or directory
/usr/share/boot-sav/b-i-s-functions.sh: line 2168: cd: /mnt/boot-sav/sda5/: No such file or directory
/usr/share/boot-sav/b-i-s-functions.sh: line 2168: cd: /mnt/boot-sav/sda6/: No such file or directory
/usr/share/boot-sav/b-i-s-functions.sh: line 2168: cd: /mnt/boot-sav/sda8/boot/: No such file or directory
/usr/share/boot-sav/b-i-s-functions.sh: line 884: [: 2.73495e+09: integer expression expected
Suggested repair: ______________________________________________________________
The default repair of the Boot-Repair utility would not act on the MBR.
Additional repair would be performed: win-legacy-basic-fix