Je colle ci-dessous le contenu du Boot-info dont tu as donné le lien dans le post #36 :
boot-info-4ppa125 [20210203_1315]
============================== Boot Info Summary ===============================
=> No boot loader is installed in the MBR of /dev/sda.
sda1: __________________________________________________________________________
File system: vfat
Boot sector type: FAT32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files: /efi/BOOT/fbx64.efi /efi/BOOT/mmx64.efi
/efi/ubuntu/grubx64.efi /efi/ubuntu/mmx64.efi
/efi/ubuntu/shimx64.efi /efi/ubuntu/grub.cfg
sda2: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 20.10
Boot files: /boot/grub/grub.cfg /etc/fstab /etc/default/grub
================================ 1 OS detected =================================
OS#1: L'OS actuellement utilisé - Ubuntu 20.10 CurrentSession on sda2
============================ Architecture/Host Info ============================
CPU architecture: 64-bit
BOOT_IMAGE of the installed session in use:
/boot/vmlinuz-5.8.0-41-generic root=UUID=cb2ca4b5-cf1a-4d2e-a447-59393f5c90c2 ro quiet splash
===================================== 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: 0000,0001,0002,0003,0004,0005
Boot0000* ubuntu HD(1,GPT,4d4f3e5e-c8d3-4fae-b34a-21c580c2f072,0x800,0x100000)/File(\EFI\ubuntu\shimx64.efi)
Boot0001* Diskette Drive BBS(Floppy,Diskette Drive,0x0)..BO
Boot0002* Internal HDD BBS(HD,P0: TOSHIBA MQ01ABD100,0x0)..BO
Boot0003* USB Storage Device BBS(USB,USB Storage Device,0x0)..BO
Boot0004* PLDS DVD+/-RW DU-8A5LH BBS(CDROM,P1: PLDS DVD+/-RW DU-8A5LH,0x0)..BO
Boot0005* Onboard NIC BBS(Network,Onboard NIC,0x0)..BO
2895d47544fd587b26c7e29be1295c27 sda1/BOOT/fbx64.efi
dc3c47be2f78a78e5e57d097ae6c5c84 sda1/BOOT/mmx64.efi
92fb77760971a57d878fe09aaed99a96 sda1/ubuntu/grubx64.efi
dc3c47be2f78a78e5e57d097ae6c5c84 sda1/ubuntu/mmx64.efi
78415fb8fb9b909f8029858113f1335f sda1/ubuntu/shimx64.efi
78415fb8fb9b909f8029858113f1335f sda1/BOOT/BOOTX64.efi
============================= 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): _________________________________________________________
sda2 : 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
Partitions info (2/3): _________________________________________________________
sda2 : isnotESP, fstab-has-goodEFI, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
sda1 : is---ESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
Partitions info (3/3): _________________________________________________________
sda2 : not-sepboot, with-boot, fstab-without-boot, not-sep-usr, with--usr, fstab-without-usr, std-grub.d, sda
sda1 : 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: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk identifier: 863EF915-DF46-4FFD-9763-920273BF6D10
Start End Sectors Size Type
sda1 2048 1050623 1048576 512M EFI System
sda2 1050624 1953523711 1952473088 931G Linux filesystem
parted -lm (filtered): _________________________________________________________
sda:1000GB:scsi:512:4096:gpt:ATA TOSHIBA MQ01ABD1:;
1:1049kB:538MB:537MB:fat32:EFI System Partition:boot, esp;
2:538MB:1000GB:1000GB:ext4::;
blkid (filtered): ______________________________________________________________
NAME FSTYPE UUID PARTUUID LABEL PARTLABEL
sda
├─sda1 vfat 5381-11C7 4d4f3e5e-c8d3-4fae-b34a-21c580c2f072 EFI System Partition
└─sda2 ext4 cb2ca4b5-cf1a-4d2e-a447-59393f5c90c2 a444717b-a6e9-4a9f-9bec-cd65948aca87
df (filtered): _________________________________________________________________
Avail Use% Mounted on
sda2 848.1G 2% /
Mount options: __________________________________________________________________
sda2 rw,relatime,errors=remount-ro
===================== sda1/efi/ubuntu/grub.cfg (filtered) ======================
search.fs_uuid cb2ca4b5-cf1a-4d2e-a447-59393f5c90c2 root hd0,gpt2
set prefix=($root)'/boot/grub'
configfile $prefix/grub.cfg
====================== sda2/boot/grub/grub.cfg (filtered) ======================
Ubuntu cb2ca4b5-cf1a-4d2e-a447-59393f5c90c2
Ubuntu, avec Linux 5.8.0-41-generic cb2ca4b5-cf1a-4d2e-a447-59393f5c90c2
Ubuntu, avec Linux 5.8.0-25-generic cb2ca4b5-cf1a-4d2e-a447-59393f5c90c2
### END /etc/grub.d/30_os-prober ###
UEFI Firmware Settings uefi-firmware
### END /etc/grub.d/30_uefi-firmware ###
========================== sda2/etc/fstab (filtered) ===========================
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda2 during installation
UUID=cb2ca4b5-cf1a-4d2e-a447-59393f5c90c2 / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda1 during installation
UUID=5381-11C7 /boot/efi vfat umask=0077 0 1
/swapfile none swap sw 0 0
======================= sda2/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=""
==================== sda2: Location of files loaded by Grub ====================
GiB - GB File Fragment(s)
652,842185974 = 700,983959552 boot/grub/grub.cfg 2
6,787185669 = 7,287685120 boot/vmlinuz 2
5,336910248 = 5,730463744 boot/vmlinuz-5.8.0-25-generic 2
6,787185669 = 7,287685120 boot/vmlinuz-5.8.0-41-generic 2
5,336910248 = 5,730463744 boot/vmlinuz.old 2
17,448280334 = 18,734948352 boot/initrd.img 5
17,307285309 = 18,583556096 boot/initrd.img-5.8.0-25-generic 1
17,448280334 = 18,734948352 boot/initrd.img-5.8.0-41-generic 5
17,307285309 = 18,583556096 boot/initrd.img.old 1
===================== sda2: ls -l /etc/grub.d/ (filtered) ======================
-rwxr-xr-x 1 root root 17622 oct. 1 16:59 10_linux
-rwxr-xr-x 1 root root 42359 oct. 1 16:59 10_linux_zfs
-rwxr-xr-x 1 root root 12894 oct. 1 16:59 20_linux_xen
-rwxr-xr-x 1 root root 12059 oct. 1 16:59 30_os-prober
-rwxr-xr-x 1 root root 1424 oct. 1 16:59 30_uefi-firmware
-rwxr-xr-x 1 root root 214 oct. 1 16:59 40_custom
-rwxr-xr-x 1 root root 216 oct. 1 16:59 41_custom
Suggested repair: ______________________________________________________________
The default repair of the Boot-Repair utility would reinstall the grub-efi-amd64-signed of
sda2,
using the following options: sda1/boot/efi,
Additional repair would be performed: unhide-bootmenu-10s use-standard-efi-file
Final advice in case of suggested repair: ______________________________________
Please do not forget to make your UEFI firmware boot on the L'OS actuellement utilisé - Ubuntu 20.10 CurrentSession entry (sda1/efi/****/shim****.efi (**** will be updated in the final message) file) !
Dans la partie "blkid (filtered)" du Boot-info, on y voit que l'UUID de la partition sda1 (la partition EFI) est
5381-11C7 alors que dans les Boot-info précédents (post #2 et post #25), L'UUID de la partition EFI était
77E6-DE51. Par conséquent, tu as bien réalisé la suppression de toutes les partitions qu'il y avait sur le disque comme conseillé par PPdM dans le post #29. De ce fait l'installateur de Ubuntu 20.10 a bien été forcé de recréer la partition EFI et c'est pour cette raison qu'elle a un identifiant différent.
EDIT : la "solution" que j'avais proposée dans le post #2 ne pouvait pas marcher. Je viens de le vérifier avec quelques manips en virtualisation : la sélection "Effacer le disque et installer Ubuntu" à l'étape "Type d'installation" ne supprime pas la partition EFI : elle est conservée avec tout ce qu'il y a dedans. Je croyais que c'était un bug de Ubuntu 20.10 mais ça fait pareil avec Ubuntu 20.04.1.
