Je colle ci-dessous le contenu de ton Boot-info :
boot-info-4ppa125 [20210304_1613]
============================== Boot Info Summary ===============================
=> Grub2 (v2.00) is installed in the MBR of /dev/sda and looks at sector 2048
of the same hard drive for core.img. core.img is at this location and
looks for (,gpt3)/boot/grub. It also embeds following components:
modules
---------------------------------------------------------------------------
fshelp ext2 part_gpt biosdisk
---------------------------------------------------------------------------
sda1: __________________________________________________________________________
File system: BIOS Boot partition
Boot sector type: Grub2's core.img
Boot sector info:
sda2: __________________________________________________________________________
File system: swap
Boot sector type: -
Boot sector info:
sda3: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 20.04.2 LTS
Boot files: /boot/grub/grub.cfg /etc/fstab /etc/default/grub
/boot/grub/i386-pc/core.img
sda4: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System:
Boot files:
================================ 1 OS detected =================================
OS#1: L'OS actuellement utilisé - Ubuntu 20.04.2 LTS CurrentSession on sda3
============================ Architecture/Host Info ============================
CPU architecture: 64-bit
BOOT_IMAGE of the installed session in use:
/boot/vmlinuz-5.8.0-44-generic root=UUID=d5b36f19-33e1-4d82-9b18-b00e5a12e8f9 ro quiet splash vt.handoff=7
===================================== UEFI =====================================
This installed-session is not in EFI-mode.
EFI in dmesg.
[ 0.009154] ACPI: UEFI 0x000000008AF7C750 000042 (v01 00000000 00000000)
============================= Drive/Partition Info =============================
Disks info: ____________________________________________________________________
sda : is-GPT, hasBIOSboot, has-noESP, not-usb, not-mmc, has-os, 2048 sectors * 512 bytes
Partitions info (1/3): _________________________________________________________
sda3 : is-os, 64, apt-get, grub-pc , grub2, grub-install, grubenv-ok, update-grub, not-far
sda4 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
Partitions info (2/3): _________________________________________________________
sda3 : isnotESP, fstab-without-efi, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
sda4 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
Partitions info (3/3): _________________________________________________________
sda3 : not-sepboot, with-boot, fstab-without-boot, not-sep-usr, with--usr, fstab-without-usr, std-grub.d, sda
sda4 : 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: 0F6EADBA-1879-4DFA-9412-BFBC0332F17B
Start End Sectors Size Type
sda1 2048 6143 4096 2M BIOS boot
sda2 6144 11724799 11718656 5.6G Linux swap
sda3 11724800 89849855 78125056 37.3G Linux filesystem
sda4 89849856 1953523711 1863673856 888.7G Linux filesystem
parted -lm (filtered): _________________________________________________________
sda:1000GB:scsi:512:4096:gpt:ATA ST1000LX015-1U71:;
1:1049kB:3146kB:2097kB:::bios_grub;
2:3146kB:6003MB:6000MB:linux-swap(v1)::swap;
3:6003MB:46.0GB:40.0GB:ext4::;
4:46.0GB:1000GB:954GB:ext4::;
blkid (filtered): ______________________________________________________________
NAME FSTYPE UUID PARTUUID LABEL PARTLABEL
sda
├─sda1 378c13ab-b4b2-4ccf-833d-7c819f8067f6
├─sda2 swap 887e1625-0217-4cd7-b551-293fd9c3ca3e fbb76e6a-04b4-4af1-8fe9-485803193491
├─sda3 ext4 d5b36f19-33e1-4d82-9b18-b00e5a12e8f9 e6652e0e-e888-4b57-ab1c-88137d95a59e
└─sda4 ext4 3e5c771f-d41c-4821-b275-ec4f6ba3b0a1 9d01951d-9637-4482-a7f6-8dee9a21fd57
df (filtered): _________________________________________________________________
Avail Use% Mounted on
sda3 19.9G 40% /
sda4 467.8G 41% /home
Mount options: __________________________________________________________________
sda3 rw,relatime,errors=remount-ro
sda4 rw,relatime
====================== sda3/boot/grub/grub.cfg (filtered) ======================
Ubuntu d5b36f19-33e1-4d82-9b18-b00e5a12e8f9
Ubuntu, with Linux 5.8.0-44-generic d5b36f19-33e1-4d82-9b18-b00e5a12e8f9
Ubuntu, with Linux 5.8.0-43-generic d5b36f19-33e1-4d82-9b18-b00e5a12e8f9
### END /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_uefi-firmware ###
========================== sda3/etc/fstab (filtered) ===========================
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda3 during installation
UUID=d5b36f19-33e1-4d82-9b18-b00e5a12e8f9 / ext4 errors=remount-ro 0 1
# /home was on /dev/sda4 during installation
UUID=3e5c771f-d41c-4821-b275-ec4f6ba3b0a1 /home ext4 defaults 0 2
# swap was on /dev/sda2 during installation
UUID=887e1625-0217-4cd7-b551-293fd9c3ca3e none swap sw 0 0
======================= sda3/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=""
==================== sda3: Location of files loaded by Grub ====================
GiB - GB File Fragment(s)
36.456130981 = 39.144472576 boot/grub/grub.cfg 2
37.821407318 = 40.610426880 boot/grub/i386-pc/core.img 1
30.287384033 = 32.520830976 boot/vmlinuz 1
7.474868774 = 8.026079232 boot/vmlinuz-5.8.0-43-generic 1
30.287384033 = 32.520830976 boot/vmlinuz-5.8.0-44-generic 1
7.474868774 = 8.026079232 boot/vmlinuz.old 1
30.733173370 = 32.999493632 boot/initrd.img 4
8.546504974 = 9.176739840 boot/initrd.img-5.8.0-43-generic 1
30.733173370 = 32.999493632 boot/initrd.img-5.8.0-44-generic 4
8.546504974 = 9.176739840 boot/initrd.img.old 1
===================== sda3: ls -l /etc/grub.d/ (filtered) ======================
-rwxr-xr-x 1 root root 17622 janv. 13 15:12 10_linux
-rwxr-xr-x 1 root root 42359 janv. 13 15:12 10_linux_zfs
-rwxr-xr-x 1 root root 12894 janv. 13 15:12 20_linux_xen
-rwxr-xr-x 1 root root 12059 janv. 13 15:12 30_os-prober
-rwxr-xr-x 1 root root 1424 janv. 13 15:12 30_uefi-firmware
-rwxr-xr-x 1 root root 214 janv. 13 15:12 40_custom
-rwxr-xr-x 1 root root 216 janv. 13 15:12 41_custom
Suggested repair: ______________________________________________________________
The default repair of the Boot-Repair utility would reinstall the grub2 of
sda3 into the MBR of sda.
Additional repair would be performed: unhide-bootmenu-10s
Pour moi, tout est normal là-dedans. Ton problème de lenteur ne doit pas être décelable dans un Boot-info.