Bonjour,

Voilà je viens d'installer Ubuntu 20.04 en dual boot avec windows 10 sur mon PC portable Asus Zenbook et cela avait l'air de fonctionner, sauf que c'est Linux qui démarre en premier alors que j'aurai souhaité que ce soit windows 10. Grâce aux conseils trouvés sur le net, j'ai réussi à prioriser le démarrage de windows 10 au lieu de Unbuntu. Mais voila Ubuntu ne démarre plus du tout.

J'ai cru comprendre que cela venait du Grub et j'ai essayé les méthodes de réparation préconisées pour le Grub, mais apparemment, le PC serait en mode secure et Linux demande à supprimer le Grub tout en me précisant que ne ne pourrai plus démarrer sans l'installation d'un nouveau Grub. Du coup pour ne pas faire de bétise et bloquer par la même occasion mon windows 10 qui me sert aussi à télé travailler, je préfère demander votre avis sur la démarche àsuivre pour régler ce problème : à savoir ; pouvoir démarrer automatiquement sur W10 et sélectionner Ubuntu au démarrage si je souhaite démarrer sur celui ci.

Je vous envoie ci dessous le rapport du boot repair pour analyse et recommandations de votre part.

Merci d'avance

Petite précision : J'ai deux partitions windows : une pour le système et l'autre pour mes données.

https://paste.ubuntu.com/p/rqyjsRP3r3/

Paste from boot-repair at Sat, 20 Feb 2021 11:02:35 +0000

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boot-repair-4ppa125                                              [20210220_1102]

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

 => No boot loader is installed in the MBR of /dev/sda.
 => Syslinux MBR (5.00 and higher) is installed in the MBR of /dev/sdb.

sda1: __________________________________________________________________________

    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/Boot/fbx64.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

sda2: __________________________________________________________________________

    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:        /Windows/System32/winload.exe

sda3: __________________________________________________________________________

    File system:       ntfs
    Boot sector type:  Windows 7/2008: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  
    Boot files:        

sda4: __________________________________________________________________________

    File system:       ext4
    Boot sector type:  -
    Boot sector info: 
    Operating System:  Ubuntu 20.04.2 LTS
    Boot files:        /etc/fstab

sdb1: __________________________________________________________________________

    File system:       vfat
    Boot sector type:  SYSLINUX 6.04
    Boot sector info:  Syslinux looks at sector 16392 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


================================ 2 OS detected =================================

OS#1:   Ubuntu 20.04.2 LTS on sda4
OS#2:   Windows 8 or 10 on sda2

============================ Architecture/Host Info ============================

CPU architecture: 64-bit
Live-session OS is Ubuntu 64-bit (Ubuntu 20.04.1 LTS, focal, x86_64)


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

BIOS is EFI-compatible, and is setup in EFI-mode for this live-session.
SecureBoot enabled.

efibootmgr -v
BootCurrent: 0005
Timeout: 1 seconds
BootOrder: 0004,0003,0001,0005,0000
Boot0000* Windows Boot Manager	VenHw(99e275e7-75a0-4b37-a2e6-c5385e6c00cb)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.}....................
Boot0001* Windows Boot Manager	HD(1,GPT,8f680390-e980-4291-aada-38baaa42ba91,0x800,0x82000)/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.}....................
Boot0003* ubuntu	HD(1,GPT,8f680390-e980-4291-aada-38baaa42ba91,0x800,0x82000)/File(\EFI\UBUNTU\SHIMX64.EFI)
Boot0004* ubuntu	HD(1,GPT,8f680390-e980-4291-aada-38baaa42ba91,0x800,0x82000)/File(\EFI\UBUNTU\GRUBX64.EFI)..BO
Boot0005* UEFI:  0, Partition 1	PciRoot(0x0)/Pci(0x14,0x0)/USB(0,0)/HD(1,MBR,0x127983eb,0x800,0x777800)..BO

78415fb8fb9b909f8029858113f1335f   sda1/Boot/bootx64.efi
2895d47544fd587b26c7e29be1295c27   sda1/Boot/fbx64.efi
dc3c47be2f78a78e5e57d097ae6c5c84   sda1/Boot/mmx64.efi
637fa7fabc8a2f70312edf2f15e275ff   sda1/ubuntu/grubx64.efi
dc3c47be2f78a78e5e57d097ae6c5c84   sda1/ubuntu/mmx64.efi
78415fb8fb9b909f8029858113f1335f   sda1/ubuntu/shimx64.efi
3c080490d0eb8fdb738f298c3e44b3e0   sda1/Microsoft/Boot/bootmgfw.efi
da7c9088c9d0bff4ac469abdfc8f540e   sda1/Microsoft/Boot/bootmgr.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): _________________________________________________________

sda1	: no-os,	32, nopakmgr,	no-docgrub,	nogrub,	nogrubinstall,	no-grubenv,	noupdategrub,	not-far
sda2	: is-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
sda4	: is-os,	64, apt-get,	no-docgrub,	nogrub,	nogrubinstall,	no-grubenv,	noupdategrub,	farbios

Partitions info (2/3): _________________________________________________________

sda1	: is---ESP,	part-has-no-fstab,	no-nt,	no-winload,	no-recov-nor-hid,	no-bmgr,	notwinboot
sda2	: isnotESP,	part-has-no-fstab,	no-nt,	haswinload,	no-recov-nor-hid,	no-bmgr,	notwinboot
sda3	: isnotESP,	part-has-no-fstab,	no-nt,	no-winload,	no-recov-nor-hid,	no-bmgr,	notwinboot
sda4	: isnotESP,	fstab-has-goodEFI,	no-nt,	no-winload,	no-recov-nor-hid,	no-bmgr,	notwinboot

Partitions info (3/3): _________________________________________________________

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-boot,	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
sda4	: not-sepboot,	with-boot,	fstab-without-boot,	not-sep-usr,	with--usr,	fstab-without-usr,	std-grub.d,	sda

fdisk -l (filtered): ___________________________________________________________

Disk sda: 119.25 GiB, 128035676160 bytes, 250069680 sectors
Disk identifier: FC17C4B7-7A3E-45C0-81D7-DE98595B0EF5
          Start       End   Sectors  Size Type
sda1       2048    534527    532480  260M EFI System
sda2     567296 159043499 158476204 75.6G Microsoft basic data
sda3  159043584 189224834  30181251 14.4G Microsoft basic data
sda4  189224960 250068991  60844032   29G Linux filesystem
Disk sdb: 3.75 GiB, 4009754624 bytes, 7831552 sectors
Disk identifier: 0x127983eb
      Boot Start     End Sectors  Size Id Type
sdb1  *     2048 7831551 7829504  3.8G  c W95 FAT32 (LBA)

parted -lm (filtered): _________________________________________________________

sda:128GB:scsi:512:512:gpt:ATA LITEON CV1-8B128:;
1:1049kB:274MB:273MB:fat32:EFI system partition:boot, esp;
2:290MB:81.4GB:81.1GB:ntfs:Basic data partition:msftdata;
3:81.4GB:96.9GB:15.5GB:ntfs:Basic data partition:msftdata;
4:96.9GB:128GB:31.2GB:ext4::;
sdb:4010MB:scsi:512:512:msdos: :;
1:1049kB:4010MB:4009MB:fat32::boot, lba;

blkid (filtered): ______________________________________________________________

NAME   FSTYPE   UUID                                 PARTUUID                             LABEL       PARTLABEL
sda                                                                                                   
├─sda1 vfat     0283-25C3                            8f680390-e980-4291-aada-38baaa42ba91 SYSTEM      EFI system partition
├─sda2 ntfs     221486CB1486A181                     7a2a3508-c8dd-4d09-9edf-a3cec9312260 OS          Basic data partition
├─sda3 ntfs     0CC512FE0CC512FE                     e1e29b1c-4a68-11ea-9536-d85aeedc4ed8 DATA        Basic data partition
└─sda4 ext4     2ff60d1e-1f05-4de2-b735-0dd496b4d129 297af3c2-6c60-4c47-903d-e85f73dc318a             
sdb                                                                                                   
└─sdb1 vfat     4EB0-30ED                            127983eb-01                          UBUNTU 20_0 

df (filtered): _________________________________________________________________

       Avail Use% Mounted on
sda1   222.6M  13% /mnt/boot-sav/sda1
sda2    41.6G  45% /mnt/boot-sav/sda2
sda3    14.3G   1% /mnt/boot-sav/sda3
sda4    18.3G  31% /mnt/boot-sav/sda4
sdb1     1.1G  70% /cdrom

Mount options: __________________________________________________________________

sda1   rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro
sda2   rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sda3   rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sda4   rw,relatime
sdb1   ro,noatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro

===================== sda1/efi/ubuntu/grub.cfg (filtered) ======================

search.fs_uuid 2ff60d1e-1f05-4de2-b735-0dd496b4d129 root hd0,gpt4 
set prefix=($root)'/boot/grub'
configfile $prefix/grub.cfg

========================== sda4/etc/fstab (filtered) ===========================

# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda4 during installation
UUID=2ff60d1e-1f05-4de2-b735-0dd496b4d129 /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/sda1 during installation
/swapfile                                 none            swap    sw              0       0
UUID=0283-25C3  /boot/efi       vfat    defaults      0       1

==================== sda4: Location of files loaded by Grub ====================

           GiB - GB             File                                 Fragment(s)
 102,199478149 = 109,735854080  boot/vmlinuz                                   1
  93,963863373 = 100,892930048  boot/vmlinuz-5.4.0-42-generic                  2
 101,886978149 = 109,400309760  boot/vmlinuz-5.8.0-41-generic                  1
 102,199478149 = 109,735854080  boot/vmlinuz-5.8.0-43-generic                  1
 101,886978149 = 109,400309760  boot/vmlinuz.old                               1
  98,805660248 = 106,091769856  boot/initrd.img                                3
 103,660816193 = 111,304953856  boot/initrd.img-5.4.0-42-generic               1
 103,613906860 = 111,254585344  boot/initrd.img-5.8.0-41-generic               2
  98,805660248 = 106,091769856  boot/initrd.img-5.8.0-43-generic               3
 103,613906860 = 111,254585344  boot/initrd.img.old                            2

====================== 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


=============================== StdErr Messages ================================

File descriptor 63 (pipe:[173027]) leaked on lvs invocation. Parent PID 36668: /bin/bash

Suggested repair: ______________________________________________________________

The default repair of the Boot-Repair utility would purge (in order to fix packages) and reinstall the grub-efi-amd64-signed of
sda4,
using the following options:        sda1/boot/efi,
Additional repair would be performed: unhide-bootmenu-10s win-legacy-basic-fix use-standard-efi-file    

Confirmation request before suggested repair: __________________________________

The boot of your PC is in Secure mode. You may want to retry after changing it to non-Secure mode.
Are you sure you want to continue anyway?

Final advice in case of suggested repair: ______________________________________


Please do not forget to make your UEFI firmware boot on the Ubuntu 20.04.2 LTS entry (sda1/efi/****/shim****.efi (**** will be updated in the final message) 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\****\shim****.efi (**** will be updated in the final message)

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Paste from boot-repair at Sat, 20 Feb 2021 11:02:35 +0000

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