Ubuntu 22.04突然无法启动的修复求助（附Boot-Repair检测报告）

各位好，我遇到了个棘手的问题——Ubuntu 22.04突然没法正常启动了，折腾了好一阵也没找到解决办法，希望大家能给我一些修复建议！下面是我用Boot-Repair工具生成的详细检测总结：

boot-repair-4ppa203                                              [20221219_1620]

============================== Boot Info Summary ===============================

=> No boot loader is installed in the MBR of /dev/sda.

sdg: ___________________________________________________________________________

File system:       iso9660

Boot sector type:  Grub2 (v1.99-2.00)

Boot sector info:  Grub2 (v1.99-2.00) is installed in the boot sector of

sdg and looks at sector 0 of the same hard drive for

core.img, but core.img can not be found at this

location.

Mounting failed:   mount: /mnt/BootInfo/FD/sdg: /dev/sdg already mounted or mount point busy.

================================ 0 OS detected =================================

================================ Host/Hardware =================================

CPU architecture: 64-bit

Video: Trinity [Radeon HD 7660D] EFI VGA from Advanced Micro Devices, Inc. [AMD/ATI]

Live-session OS is Ubuntu 64-bit (Ubuntu 22.04.1 LTS, jammy, x86_64)

===================================== UEFI =====================================

BIOS/UEFI firmware: 7.11(4.6) from AMI

The firmware is EFI-compatible, and is set in EFI-mode for this live-session.

SecureBoot disabled - This system doesn't support Secure Boot.

BootCurrent: 000B

Timeout: 0 seconds

BootOrder: 0009,000A,0003,0001,0002,000B,0000,0004,0006,0005,0007,0008

Boot0000* ubuntu    HD(1,MBR,0xc18980b2,0x800,0x100000)/File(\EFI\ubuntu\shimx64.efi)

Boot0001* USB Floppy/CD VenMedia(b6fef66f-1495-4584-a836-3492d1984a8d,0500000001)AMBO

Boot0002* USB Hard Drive    VenMedia(b6fef66f-1495-4584-a836-3492d1984a8d,0200000001)AMBO

Boot0003  ubuntu    HD(1,MBR,0x87c70b8b,0x800,0x100000)/File(\EFI\ubuntu\shimx64.efi)

Boot0004* ATAPI CD-ROM Drive    VenMedia(b6fef66f-1495-4584-a836-3492d1984a8d,0300000001)AMBO

Boot0005* CD/DVD Drive  BBS(CDROM,,0x0)AMGOAMNO........o.h.p. . . . . . .D.V.D.-.R.A.M. .S.W.8.1.0....................A...........................>..Gd-.;.A..MQ..L.2.1.6.1.P.T.0.0.2.5.4.6.S.T.1.H. .H. . ......AMBO

Boot0006* USB Floppy/CD VenMedia(b6fef66f-1495-4584-a836-3492d1984a8d,0500000000)AMBO

Boot0007* Hard Drive    BBS(HD,,0x0)AMGOAMNO........q.H.P. .P.h.o.t.o.s.m.a.r.t. .5.5.2.0. .1...0.0....................A.......................D..Gd-.;.A..MQ..L.H.P. .P.h.o.t.o.s.m.a.r.t. .5.5.2.0. .1...0.0......AMBOAMNO........o.P.N.Y. .C.S.9.0.0. .1.2.0.G.B. .S.S.D....................A...........................>..Gd-.;.A..MQ..L.N.P.2.Y.1.1.2.4.0.1.0.4.0.6.0.1.D.0.D.9......AMBOAMNO........y.G.e.n.e.r.a.l. .U.S.B. .F.l.a.s.h. .D.i.s.k. .1.1.0.0....................A.......................L..Gd-.;.A..MQ..L.G.e.n.e.r.a.l. .U.S.B. .F.l.a.s.h. .D.i.s.k. .1.1.0.0......AMBO

Boot0008* Atheros Boot Agent    BBS(Network,,0x0)AMBO

Boot0009  ubuntu    HD(1,MBR,0xf217301a,0x800,0x100000)/File(\EFI\ubuntu\shimx64.efi)

Boot000A  ubuntu    HD(1,MBR,0xf8a0a474,0x800,0x100000)/File(\EFI\ubuntu\shimx64.efi)

Boot000B* UEFI: General USB Flash Disk 1100 PciRoot(0x0)/Pci(0x10,0x1)/USB(4,0)/HD(2,GPT,9240a165-d190-4ab6-8a12-46dc207b42ee,0x71e8a0,0x2130)AMBO

============================= Drive/Partition Info =============================

Disks info: ____________________________________________________________________

Partitions info (1/3): _________________________________________________________

Partitions info (2/3): _________________________________________________________

Partitions info (3/3): _________________________________________________________

fdisk -l (filtered): ___________________________________________________________

Disk sda: 111.79 GiB, 120034123776 bytes, 234441648 sectors

Disk sdg: 14.92 GiB, 16025387008 bytes, 31299584 sectors

Disk identifier: 9240A165-D190-4AB6-8A10-46DC207B42EE

Start      End  Sectors  Size Type

sdg1       64  7465119  7465056  3.6G Microsoft basic data

sdg2  7465120  7473615     8496  4.1M EFI System

sdg3  7473616  7474215      600  300K Microsoft basic data

sdg4  7475200 31299520 23824321 11.4G Linux filesystem

parted -lm (filtered): _________________________________________________________

sda:120GB:scsi:512:512:unknown:ATA PNY CS900 120GB:;

sdg:16.0GB:scsi:512:512:gpt:General USB Flash Disk:;

1:32.8kB:3822MB:3822MB::ISO9660:hidden, msftdata;

2:3822MB:3826MB:4350kB::Appended2:boot, esp;

3:3826MB:3827MB:307kB::Gap1:hidden, msftdata;

4:3827MB:16.0GB:12.2GB:ext4::;

blkid (filtered): ______________________________________________________________

NAME   FSTYPE   UUID                                 PARTUUID                             LABEL                    PARTLABEL

sda

sdb

sdc

sdd

sde

sdg    iso9660  2022-08-10-16-21-45-00                                                    Ubuntu 22.04.1 LTS amd64

├─sdg1 iso9660  2022-08-10-16-21-45-00               9240a165-d190-4ab6-8a11-46dc207b42ee Ubuntu 22.04.1 LTS amd64 ISO9660

├─sdg2 vfat     8D6C-A9F8                            9240a165-d190-4ab6-8a12-46dc207b42ee ESP                      Appended2

├─sdg3                                               9240a165-d190-4ab6-8a13-46dc207b42ee                          Gap1

└─sdg4 ext4     26f315e2-7097-4e97-a724-56aa610b4894 778c3857-277a-5b4c-95fe-7632e1ed4d9b writable

Mount points (filtered): _______________________________________________________

Avail Use% Mounted on

/dev/disk/by-label/writable[/install-logs-2022-12-19.2/crash] 10.5G   0% /var/crash

/dev/disk/by-label/writable[/install-logs-2022-12-19.2/log]   10.5G   0% /var/log

/dev/sdg1                                                         0 100% /cdrom

Mount options (filtered): ______________________________________________________

Suggested repair: ______________________________________________________________

The default repair of the Boot-Repair utility would not act on the boot.

备注：内容来源于stack exchange，提问作者Richard