J'ai installé boot-repair en attendant et lancé un boot-info, le voici:
boot-repair-4ppa125 [20200612_1308]
============================== Boot Info Summary ===============================
=> Grub2 (v2.00) is installed in the MBR of /dev/sda and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and looks
for (,msdos5)/boot/grub. It also embeds following components:
modules
---------------------------------------------------------------------------
fshelp ext2 part_msdos biosdisk
---------------------------------------------------------------------------
=> Syslinux MBR (5.00 and higher) is installed in the MBR of /dev/sdb.
sda4: __________________________________________________________________________
File system: Extended Partition
Boot sector type: -
Boot sector info:
sda5: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 20.04 LTS
Boot files: /boot/grub/grub.cfg /etc/fstab /etc/default/grub
/boot/grub/i386-pc/core.img
sdb1: __________________________________________________________________________
File system: vfat
Boot sector type: SYSLINUX 6.04
Boot sector info: Syslinux looks at sector 32800 of /dev/sdb1 for its
second stage. The integrity check of Syslinux 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: Ubuntu 20.04 LTS on sda5
============================ Architecture/Host Info ============================
CPU architecture: 64-bit
Live-session OS is Ubuntu 64-bit (Ubuntu 20.04 LTS, focal, x86_64)
===================================== UEFI =====================================
This live-session is not in EFI-mode.
============================= Drive/Partition Info =============================
Disks info: ____________________________________________________________________
sda : notGPT, no-BIOSboot, has-noESP, not-usb, not-mmc, has-os, 2048 sectors * 512 bytes
Partitions info (1/3): _________________________________________________________
sda5 : is-os, 64, apt-get, grub-pc , grub2, grub-install, grubenv-ok, update-grub, farbios
Partitions info (2/3): _________________________________________________________
sda5 : isnotESP, fstab-without-efi, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
Partitions info (3/3): _________________________________________________________
sda5 : not-sepboot, with-boot, fstab-without-boot, not-sep-usr, with--usr, fstab-without-usr, std-grub.d, sda
fdisk -l (filtered): ___________________________________________________________
Disk sda: 223.58 GiB, 240057409536 bytes, 468862128 sectors
Disk identifier: 0x3dfb699a
Boot Start End Sectors Size Id Type
sda4 142229502 468860927 326631426 155.8G 5 Extended
sda5 142229504 468860927 326631424 155.8G 83 Linux
Disk sdb: 14.52 GiB, 15581839360 bytes, 30433280 sectors
Disk identifier: 0x0004312e
Boot Start End Sectors Size Id Type
sdb1 * 2048 30433279 30431232 14.5G c W95 FAT32 (LBA)
parted -lm (filtered): _________________________________________________________
sda:240GB:scsi:512:512:msdos:ATA SATA3 240GB SSD:;
4:72.8GB:240GB:167GB:::;
5:72.8GB:240GB:167GB:ext4::;
sdb:15.6GB:scsi:512:512:msdos:Verbatim STORE N GO:;
1:1049kB:15.6GB:15.6GB:fat32::boot, lba;
blkid (filtered): ______________________________________________________________
NAME FSTYPE UUID PARTUUID LABEL PARTLABEL
sda
├─sda4 3dfb699a-04
└─sda5 ext4 da00021f-2d02-49d4-9a4d-3b43fbc28ba4 3dfb699a-05
sdb
└─sdb1 vfat 9AA2-3458 0004312e-01 UBUNTU 20_0
df (filtered): _________________________________________________________________
Avail Use% Mounted on
sda5 117.2G 18% /mnt/boot-sav/sda5
sdb1 12G 17% /cdrom
Mount options: __________________________________________________________________
sda5 rw,relatime
sdb1 ro,noatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro
====================== sda5/boot/grub/grub.cfg (filtered) ======================
Ubuntu da00021f-2d02-49d4-9a4d-3b43fbc28ba4
Ubuntu, avec Linux 5.4.0-37-generic da00021f-2d02-49d4-9a4d-3b43fbc28ba4
Ubuntu, avec Linux 5.4.0-33-generic da00021f-2d02-49d4-9a4d-3b43fbc28ba4
Ubuntu, avec Linux 5.4.0-31-generic da00021f-2d02-49d4-9a4d-3b43fbc28ba4
### END /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_uefi-firmware ###
========================== sda5/etc/fstab (filtered) ===========================
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda5 during installation
UUID=da00021f-2d02-49d4-9a4d-3b43fbc28ba4 / ext4 errors=remount-ro 0 1
/swapfile none swap sw 0 0
======================= sda5/etc/default/grub (filtered) =======================
GRUB_DEFAULT=0
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=""
==================== sda5: Location of files loaded by Grub ====================
GiB - GB File Fragment(s)
196,024555206 = 210,479763456 boot/grub/grub.cfg 2
215,968921661 = 231,894863872 boot/grub/i386-pc/core.img 1
80,081172943 = 85,986504704 boot/vmlinuz 2
72,995235443 = 78,378037248 boot/vmlinuz-5.4.0-31-generic 1
73,799922943 = 79,242063872 boot/vmlinuz-5.4.0-33-generic 1
80,081172943 = 85,986504704 boot/vmlinuz-5.4.0-37-generic 2
73,799922943 = 79,242063872 boot/vmlinuz.old 1
73,916725159 = 79,367479296 boot/initrd.img 3
73,494628906 = 78,914256896 boot/initrd.img-5.4.0-31-generic 3
74,600753784 = 80,101949440 boot/initrd.img-5.4.0-33-generic 5
73,916725159 = 79,367479296 boot/initrd.img-5.4.0-37-generic 3
74,600753784 = 80,101949440 boot/initrd.img.old 5
===================== sda5: ls -l /etc/grub.d/ (filtered) ======================
-rwxr-xr-x 1 root root 17123 avril 15 11:31 10_linux
-rwxr-xr-x 1 root root 42128 avril 15 11:31 10_linux_zfs
-rwxr-xr-x 1 root root 12894 avril 15 11:31 20_linux_xen
-rwxr-xr-x 1 root root 12059 avril 15 11:31 30_os-prober
-rwxr-xr-x 1 root root 1424 avril 15 11:31 30_uefi-firmware
-rwxr-xr-x 1 root root 214 avril 15 11:31 40_custom
-rwxr-xr-x 1 root root 216 avril 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 loadconfig
LABEL loadconfig
CONFIG /isolinux/isolinux.cfg
APPEND /isolinux/
==================== 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
Suggested repair: ______________________________________________________________
The default repair of the Boot-Repair utility would reinstall the grub2 of
sda5 into the MBR of sda.
Additional repair would be performed: unhide-bootmenu-10s
J'attends de voir si vous me dites de cliquer sur la réparation.