我有一个双启动系统，其中有 Windows 10 和 Ubuntu 18.04，后者已部分升级到 20.04，但在部分升级期间，我未阅读就选择了某些内容，导致 grub 在启动期间未显示。两个操作系统都在运行，但我必须使用 F12 等系统键来启动另一个操作系统。
grub2 安装在Windows 10 的sda2系统分区的efi目录中。
============================= Boot Repair Summary ==============================
/usr/share/boot-sav/bs-cmd_terminal.sh: line 177: warning: command substitution: ignored null byte in input
Recommended repair: ____________________________________________________________
The default repair of the Boot-Repair utility will reinstall the grub-efi-amd64-signed of
sdb1,
using the following options: sda2/boot/efi,
Additional repair will be performed: unhide-bootmenu-10s use-standard-efi-file restore-efi-backups
/boot/efi added in sdb1/fstab
rm /mnt/boot-sav/sda2/efi/Boot/bootx64.efi
mv /mnt/boot-sav/sda2/efi/Boot/bkpbootx64.efi /mnt/boot-sav/sda2/efi/Boot/bootx64.efi
Mount sda2 on /boot/efi
================= Reinstall the grub-efi-amd64-signed of sdb1 ==================
grub-install --version
grub-install (GRUB) 2.04-1ubuntu26.4
efibootmgr -v from chroot before grub install
BootCurrent: 0000
Timeout: 0 seconds
BootOrder: 0000,0006,0002,0001,2001,2002,2003
Boot0000* ubuntu HD(2,GPT,6ad7128b-922e-4ee4-9baa-0ffaa5c0a297,0x1f4800,0x82000)/File(EFIubuntushimx64.efi)RC
Boot0001* Lenovo Recovery System HD(3,GPT,78d781ef-526f-4d41-ad45-e941faf2f2be,0x276800,0x1f4000)/File(EFIMicrosoftBootLrsBootMgr.efi)RC
Boot0006* Windows Boot Manager HD(2,GPT,6ad7128b-922e-4ee4-9baa-0ffaa5c0a297,0x1f4800,0x82000)/File(EFIMicrosoftBootbootmgfw.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.}....................
Boot2001* EFI USB Device RC
Boot2002* EFI DVD/CDROM RC
Boot2003* EFI Network RC
uname -r
5.4.0-51-generic
grub-install --efi-directory=/boot/efi --target=x86_64-efi --uefi-secure-boot
Installing for x86_64-efi platform.
grub-install: warning: Cannot set EFI variable Boot0000.
grub-install: warning: efivarfs_set_variable: writing to fd 7 failed: Invalid argument.
grub-install: warning: _efi_set_variable_mode: ops->set_variable() failed: Invalid argument.
grub-install: error: failed to register the EFI boot entry: Invalid argument.
Exit code: 1
df /dev/sda2
mv /boot/efi/EFI/Boot/bootx64.efi /boot/efi/EFI/Boot/bkpbootx64.efi
cp /boot/efi/EFI/ubuntu/shimx64.efi /boot/efi/EFI/Boot/bootx64.efi
grub-install --efi-directory=/boot/efi --target=x86_64-efi --uefi-secure-boot
Installing for x86_64-efi platform.
grub-install: warning: Cannot set EFI variable Boot0000.
grub-install: warning: efivarfs_set_variable: writing to fd 7 failed: Invalid argument.
grub-install: warning: _efi_set_variable_mode: ops->set_variable() failed: Invalid argument.
grub-install: error: failed to register the EFI boot entry: Invalid argument.
Exit code: 1
---- Grub-install recheck
/usr/sbin/grub-install --efi-directory=/boot/efi --target=x86_64-efi --uefi-secure-boot --recheck
Installing for x86_64-efi platform.
/usr/sbin/grub-install: warning: Cannot set EFI variable Boot0000.
/usr/sbin/grub-install: warning: efivarfs_set_variable: writing to fd 7 failed: Invalid argument.
/usr/sbin/grub-install: warning: _efi_set_variable_mode: ops->set_variable() failed: Invalid argument.
/usr/sbin/grub-install: error: failed to register the EFI boot entry: Invalid argument.
Exit code: 1
---- End of grub-install recheck
efibootmgr -v from chroot after grub install
BootCurrent: 0000
Timeout: 0 seconds
BootOrder: 0000,0006,0002,0001,2001,2002,2003
Boot0000* ubuntu HD(2,GPT,6ad7128b-922e-4ee4-9baa-0ffaa5c0a297,0x1f4800,0x82000)/File(EFIubuntushimx64.efi)RC
Boot0001* Lenovo Recovery System HD(3,GPT,78d781ef-526f-4d41-ad45-e941faf2f2be,0x276800,0x1f4000)/File(EFIMicrosoftBootLrsBootMgr.efi)RC
Boot0006* Windows Boot Manager HD(2,GPT,6ad7128b-922e-4ee4-9baa-0ffaa5c0a297,0x1f4800,0x82000)/File(EFIMicrosoftBootbootmgfw.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.}....................
Boot2001* EFI USB Device RC
Boot2002* EFI DVD/CDROM RC
Boot2003* EFI Network RC
Warning: NVram was not modified.
update-grub
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.4.0-51-generic
Found initrd image: /boot/initrd.img-5.4.0-51-generic
Found linux image: /boot/vmlinuz-5.4.0-48-generic
Found initrd image: /boot/initrd.img-5.4.0-48-generic
Found linux image: /boot/vmlinuz-5.3.0-62-generic
Found initrd image: /boot/initrd.img-5.3.0-62-generic
File descriptor 63 (pipe:[194340]) leaked on lvs invocation. Parent PID 72831: /bin/sh
Found Windows Boot Manager on /dev/sda2@/EFI/Microsoft/Boot/bootmgfw.efi
Adding boot menu entry for UEFI Firmware Settings
Unhide GRUB boot menu in sdb1/boot/grub/grub.cfg
An error occurred during the repair.
You can now reboot your computer.
Please do not forget to make your UEFI firmware boot on the The OS now in use - Ubuntu 20.04.1 LTS CurrentSession entry (sda2/EFI/ubuntu/shimx64.efi file) !
If your computer reboots directly into Windows, try to change the boot order in your UEFI firmware.
If your UEFI firmware does not allow to change the boot order, change the default boot entry of the Windows bootloader.
For example you can boot into Windows, then type the following command in an admin command prompt:
bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi
============================ Boot Info After Repair ============================
=> Grub2 (v1.99-2.00) is installed in the MBR of /dev/sda and looks at sector
557744128 of the same hard drive for core.img, but core.img can not be
found at this location.
=> No boot loader is installed in the MBR of /dev/sdb.
sda1: __________________________________________________________________________
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:
sda2: __________________________________________________________________________
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: /efi/Boot/bkpbootx64.efi /efi/Boot/bootx64.efi
/efi/Boot/fbx64.efi /efi/Boot/grubx64.efi
/efi/Boot/mmx64.efi /efi/ubuntu/grubx64.efi
/efi/ubuntu/mmx64.efi /efi/ubuntu/shimx64.efi
/efi/ubuntu/grub.cfg /efi/Microsoft/Boot/bootmgfw.efi
/efi/Microsoft/Boot/bootmgr.efi
/efi/Microsoft/Boot/memtest.efi
sda3: __________________________________________________________________________
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: /efi/Boot/bootx64.efi /efi/ubuntu/shimx64.efi
/efi/Microsoft/Boot/bootmgr.efi
/efi/Microsoft/Boot/LrsBootmgr.efi
/efi/Microsoft/Boot/memtest.efi /bootmgr /boot/bcd
sda4: __________________________________________________________________________
File system:
Boot sector type: -
Boot sector info:
sda5: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 8/2012: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows 8 or 10
Boot files: /bootmgr /Boot/BCD /Windows/System32/winload.exe
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: ntfs
Boot sector type: Windows 8/2012: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
sda8: __________________________________________________________________________
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:
sdb1: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 20.04.1 LTS
Boot files: /boot/grub/grub.cfg /etc/fstab /etc/default/grub
================================ 2 OS detected =================================
OS#1: The OS now in use - Ubuntu 20.04.1 LTS CurrentSession on sdb1
OS#2: Windows 8 or 10 on sda5
============================ Architecture/Host Info ============================
CPU architecture: 64-bit
BOOT_IMAGE of the installed session in use:
/boot/vmlinuz-5.4.0-51-generic root=UUID=cda62f48-fb99-4e55-8760-eeab23faf418 ro quiet splash vt.handoff=7
===================================== UEFI =====================================
BIOS is EFI-compatible, and is setup in EFI-mode for this installed-session.
SecureBoot disabled.
efibootmgr -v
BootCurrent: 0000
Timeout: 0 seconds
BootOrder: 0000,0006,0002,0001,2001,2002,2003
Boot0000* ubuntu HD(2,GPT,6ad7128b-922e-4ee4-9baa-0ffaa5c0a297,0x1f4800,0x82000)/File(\EFI\ubuntu\shimx64.efi)RC
Boot0001* Lenovo Recovery System HD(3,GPT,78d781ef-526f-4d41-ad45-e941faf2f2be,0x276800,0x1f4000)/File(\EFI\Microsoft\Boot\LrsBootMgr.efi)RC
Boot0006* Windows Boot Manager HD(2,GPT,6ad7128b-922e-4ee4-9baa-0ffaa5c0a297,0x1f4800,0x82000)/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.}....................
Boot2001* EFI USB Device RC
Boot2002* EFI DVD/CDROM RC
Boot2003* EFI Network RC
78415fb8fb9b909f8029858113f1335f sda2/Boot/bkpbootx64.efi
78415fb8fb9b909f8029858113f1335f sda2/Boot/bootx64.efi
2895d47544fd587b26c7e29be1295c27 sda2/Boot/fbx64.efi
114bd85eec32e3162958ea034020821d sda2/Boot/grubx64.efi
dc3c47be2f78a78e5e57d097ae6c5c84 sda2/Boot/mmx64.efi
114bd85eec32e3162958ea034020821d sda2/ubuntu/grubx64.efi
dc3c47be2f78a78e5e57d097ae6c5c84 sda2/ubuntu/mmx64.efi
78415fb8fb9b909f8029858113f1335f sda2/ubuntu/shimx64.efi
bd03e0601b54eeb1adc9c9fd828c1b5c sda2/Microsoft/Boot/bootmgfw.efi
769147296d49018e33a91d936ab9de44 sda2/Microsoft/Boot/bootmgr.efi
ff6d345785671fbcea9561a3cbc47702 sda3/Boot/bootx64.efi
f7a57b08bc7c1c85417ae4cea582d1d4 sda3/ubuntu/shimx64.efi
bb971a4a02185961543c7903473a6680 sda3/Microsoft/Boot/bootmgr.efi
5692b49c53b4401e76a43c82d7d496de sda3/Microsoft/Boot/LrsBootmgr.efi
f7a57b08bc7c1c85417ae4cea582d1d4 sda8/ubuntu/shimx64.efi
============================= Drive/Partition Info =============================
Disks info: ____________________________________________________________________
sdb : is-GPT, no-BIOSboot, has-noESP, not-usb, not-mmc, has-os, 2048 sectors * 512 bytes
sda : is-GPT, no-BIOSboot, has---ESP, not-usb, not-mmc, has-os, 2048 sectors * 512 bytes
Partitions info (1/3): _________________________________________________________
sdb1 : is-os, 64, apt-get, signed grub-pc grub-efi , grub2, grub-install, grubenv-ok, update-grub, farbios
sda1 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far
sda2 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far
sda3 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far
sda5 : is-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
sda6 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
sda7 : 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
Partitions info (2/3): _________________________________________________________
sdb1 : isnotESP, fstab-has-goodEFI, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
sda1 : isnotESP, part-has-no-fstab, no-nt, no-winload, recovery-or-hidden, no-bmgr, notwinboot
sda2 : 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, no-winload, recovery-or-hidden, bootmgr, is-winboot
sda5 : isnotESP, part-has-no-fstab, no-nt, haswinload, no-recov-nor-hid, bootmgr, is-winboot
sda6 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
sda7 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
sda8 : isnotESP, part-has-no-fstab, no-nt, no-winload, recovery-or-hidden, no-bmgr, notwinboot
Partitions info (3/3): _________________________________________________________
sdb1 : not-sepboot, with-boot, fstab-without-boot, not-sep-usr, with--usr, fstab-without-usr, std-grub.d, sdb
sda1 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
sda2 : not-sepboot, no-kernel, 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
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
sda7 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
sda8 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
fdisk -l (filtered): ___________________________________________________________
Disk sda: 465.78 GiB, 500107862016 bytes, 976773168 sectors
Disk identifier: F917B1FE-DF7E-4E6C-A0EB-2C49CF475D17
Start End Sectors Size Type
sda1 2048 2050047 2048000 1000M Windows recovery environment
sda2 2050048 2582527 532480 260M EFI System
sda3 2582528 4630527 2048000 1000M Lenovo boot partition
sda4 4630528 4892671 262144 128M Microsoft reserved
sda5 4892672 682748391 677855720 323.2G Microsoft basic data
sda6 682752000 896858111 214106112 102.1G Microsoft basic data
sda7 896860160 949291007 52430848 25G Microsoft basic data
sda8 949291008 976773119 27482112 13.1G Windows recovery environment
Disk sdb: 223.59 GiB, 240065183744 bytes, 468877312 sectors
Disk identifier: 23D32894-35FA-460A-940E-CA2E0827F347
Start End Sectors Size Type
sdb1 2048 199999487 199997440 95.4G Linux filesystem
parted -lm (filtered): _________________________________________________________
sda:500GB:scsi:512:4096:gpt:ATA WDC WD5000LPCX-2:;
1:1049kB:1050MB:1049MB:ntfs:Basic data partition:hidden, diag;
2:1050MB:1322MB:273MB:fat32:EFI system partition:boot, esp;
3:1322MB:2371MB:1049MB:fat32:Basic data partition:hidden;
4:2371MB:2505MB:134MB::Microsoft reserved partition:msftres;
5:2505MB:350GB:347GB:ntfs:Basic data partition:msftdata;
6:350GB:459GB:110GB:ntfs:Basic data partition:msftdata;
7:459GB:486GB:26.8GB:ntfs:Basic data partition:msftdata;
8:486GB:500GB:14.1GB:ntfs:Basic data partition:hidden, diag;
sdb:240GB:scsi:512:512:gpt:ATA WDC WDS240G2G0A-:;
1:1049kB:102GB:102GB:ext4::;
blkid (filtered): ______________________________________________________________
NAME FSTYPE UUID PARTUUID LABEL PARTLABEL
sda
├─sda1 ntfs E4028CBF028C9866 40261cc0-6d21-48c9-9a78-fc1f9a470f63 WINRE_DRV Basic data partition
├─sda2 vfat 8E8F-3521 6ad7128b-922e-4ee4-9baa-0ffaa5c0a297 SYSTEM_DRV EFI system partition
├─sda3 vfat 7C92-B9A8 78d781ef-526f-4d41-ad45-e941faf2f2be LRS_ESP Basic data partition
├─sda4 84fd7afe-e8e6-4afd-870c-7e8ae0f1321e Microsoft reserved partition
├─sda5 ntfs 36D69613D695D409 4b9c9681-fc99-425c-8d76-a4779b1ef9ac Windows8_OS Basic data partition
├─sda6 ntfs CC52A8C952A8B99A f435d1fa-5965-4c38-bd9f-c7607d635829 New Volume Basic data partition
├─sda7 ntfs ECB29FF5B29FC28E 35cd5b24-b5cf-43e5-9019-e16cff864908 Setup Basic data partition
└─sda8 ntfs 4C969978969962EE f96a4ba4-9bf1-4613-b867-5475f0904a76 PBR_DRV Basic data partition
sdb
└─sdb1 ext4 cda62f48-fb99-4e55-8760-eeab23faf418 5ef2933b-0372-40a0-b3a5-d3e0923db3b5
df (filtered): _________________________________________________________________
Avail Use% Mounted on
sda1 730.3M 27% /mnt/boot-sav/sda1
sda3 497.7M 50% /mnt/boot-sav/sda3
sda5 221.6G 31% /mnt/boot-sav/sda5
sda6 64.5G 37% /mnt/boot-sav/sda6
sda7 15.5G 38% /mnt/boot-sav/sda7
sda8 3.5G 73% /mnt/boot-sav/sda8
sdb1 13.3G 81% /
Mount options: __________________________________________________________________
sda1 rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sda3 rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro
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
sda7 rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sda8 rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sdb1 rw,relatime,errors=remount-ro
===================== sda2/efi/ubuntu/grub.cfg (filtered) ======================
search.fs_uuid cda62f48-fb99-4e55-8760-eeab23faf418 root hd1,gpt1
set prefix=($root)'/boot/grub'
configfile $prefix/grub.cfg
====================== sdb1/boot/grub/grub.cfg (filtered) ======================
Windows Boot Manager (on sda2) osprober-efi-8E8F-3521
Ubuntu cda62f48-fb99-4e55-8760-eeab23faf418
Ubuntu, with Linux 5.4.0-51-generic cda62f48-fb99-4e55-8760-eeab23faf418
Ubuntu, with Linux 5.4.0-48-generic cda62f48-fb99-4e55-8760-eeab23faf418
Ubuntu, with Linux 5.3.0-62-generic cda62f48-fb99-4e55-8760-eeab23faf418
Windows Boot Manager (on sda2) osprober-efi-8E8F-3521
### END /etc/grub.d/30_os-prober ###
UEFI Firmware Settings uefi-firmware
### END /etc/grub.d/30_uefi-firmware ###
========================== sdb1/etc/fstab (filtered) ===========================
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdb1 during installation
UUID=cda62f48-fb99-4e55-8760-eeab23faf418 / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda2 during installation
/swapfile none swap sw 0 0
UUID=8E8F-3521 /boot/efi vfat defaults 0 1
======================= sdb1/etc/default/grub (filtered) =======================
GRUB_DEFAULT="menuentry 'Windows Boot Manager (on /dev/sda2)' --class windows --class os 'osprober-efi-8E8F-3521' {"
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""
==================== sdb1: Location of files loaded by Grub ====================
GiB - GB File Fragment(s)
72.129295349 = 77.448241152 boot/grub/grub.cfg 1
16.589977264 = 17.813352448 boot/vmlinuz 2
60.501693726 = 64.963198976 boot/vmlinuz-5.3.0-62-generic 1
69.386852264 = 74.503565312 boot/vmlinuz-5.4.0-48-generic 1
16.589977264 = 17.813352448 boot/vmlinuz-5.4.0-51-generic 2
69.386852264 = 74.503565312 boot/vmlinuz.old 1
69.386852264 = 74.503565312 vmlinuz 1
16.868160248 = 18.112049152 boot/initrd.img 4
69.928287506 = 75.084926976 boot/initrd.img-5.3.0-62-generic 2
80.347923279 = 86.272925696 boot/initrd.img-5.4.0-48-generic 2
16.868160248 = 18.112049152 boot/initrd.img-5.4.0-51-generic 4
80.347923279 = 86.272925696 boot/initrd.img.old 2
80.347923279 = 86.272925696 initrd.img 2
===================== sdb1: ls -l /etc/grub.d/ (filtered) ======================
-rwxr-xr-x 1 root root 17622 Sep 8 15:54 10_linux
-rwxr-xr-x 1 root root 42359 Sep 8 15:54 10_linux_zfs
-rwxr-xr-x 1 root root 12894 Sep 8 15:54 20_linux_xen
-rwxr-xr-x 1 root root 12059 Feb 8 2019 30_os-prober
-rwxr-xr-x 1 root root 1424 Sep 8 15:54 30_uefi-firmware
-rwxr-xr-x 1 root root 214 Feb 8 2019 40_custom
-rwxr-xr-x 1 root root 216 Feb 8 2019 41_custom
======================== Unknown MBRs/Boot Sectors/etc =========================
Unknown GPT Partiton Type
e7afbfbf4fa38a449a5b6213eb736c22
=============================== StdErr Messages ================================
File descriptor 63 (pipe:[194340]) leaked on lvs invocation. Parent PID 58516: /bin/bash
答案1
尝试在你的 efi 分区上重新安装 grub。根据你的描述，它是 /dev/sda2
sudo grub-install /dev/sda2