#1 Le 02/06/2026, à 16:25
- pthenot
Impossible de rebooter Lenovo IdeaPad Slim équipé d'un snapdragon
Bonjour Geole,
Lors de l'installation en dual boot ubuntu 26.04 sur un portable Lenovo IdeaPad Slim équipé d'un snapdragon il est impossible de rebooter.
Même constat avec resolute et plucky.
Le boot-info retrouve cela https://paste.ubuntu.com/p/Ff82w2XyVM/, sur ubuntu discourse forum il y a des solutions tellement complexes qu'elles ne tiendront pas les mises à jour.
J'ai parcouru ta discussion https://forum.ubuntu-fr.org/viewtopic.p … #p22897503, penses-tu qu'il serait pertinent d'installer rEFInd?
Merci por ton expertise.
Bonne journée,
modération: deux messages détachés du fil technique [Réparateur de démarrage] Développement du logiciel Boot-Repair
Dernière modification par xubu1957 (Le 02/06/2026, à 17:50)
Hors ligne
#2 Le 02/06/2026, à 17:41
- geole
Re : Impossible de rebooter Lenovo IdeaPad Slim équipé d'un snapdragon
Bonjour
D'après le boot-info, L'O.S est correctement installé
=================== nvme0n1p5/boot/grub/grub.cfg (filtered) ====================
Ubuntu ab513327-e213-4312-b5d7-2a09d85daa27
Windows Boot Manager (on nvme0n1p1) osprober-efi-E802-977A
### END /etc/grub.d/30_os-prober ###
UEFI Firmware Settings uefi-firmware
### END /etc/grub.d/30_uefi-firmware ###D'après la documentation refind, il est bien disponible pour l'architecture AARCH64.
A toi de voir si tu peux l'installer et s'il te fait booter les O.S.
A priori, il y a de la place dans la partition de boot
nvme0n1p1: _____________________________________________________________________
File system: vfat
Boot sector type: FAT32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
Mount points (filtered): _______________________________________________________
Avail Use% Mounted on
/dev/nvme0n1p1 149.9M 41% /target/boot/efiet tu ne risques rien
Dernière modification par geole (Le 03/06/2026, à 10:28)
Les écrans de l'installateur 26.04 https://doc.ubuntu-fr.org/tutoriel/inst … _subiquity
Les partitions EXT4 des disques externes => https://forum.ubuntu-fr.org/viewtopic.p … #p22697248
Hors ligne
#3 Le 02/06/2026, à 17:56
- xubu1957
Re : Impossible de rebooter Lenovo IdeaPad Slim équipé d'un snapdragon
Bonjour,
Collage du Boot-repair, pour les spécialistes :
boot-repair-4ppa2088 [20260507_1225]
============================== Boot Info Summary ===============================
=> No boot loader is installed in the MBR of /dev/nvme0n1.
=> 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 (hd0,msdos1)/boot/grub. It also embeds following components:
modules
---------------------------------------------------------------------------
biosdisk fshelp fat exfat ext2 ntfs ntfscomp part_msdos
---------------------------------------------------------------------------
nvme0n1p1: _____________________________________________________________________
File system: vfat
Boot sector type: FAT32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
nvme0n1p2: _____________________________________________________________________
File system:
Boot sector type: -
Boot sector info:
nvme0n1p3: _____________________________________________________________________
File system: ntfs
Boot sector type: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
nvme0n1p4: _____________________________________________________________________
File system: ntfs
Boot sector type: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
nvme0n1p5: _____________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 26.04 LTS
Boot files: /boot/grub/grub.cfg /etc/fstab /etc/default/grub
nvme0n1p6: _____________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 26.04 LTS
Boot files: /boot/grub/grub.cfg /etc/fstab /etc/default/grub
sda1: __________________________________________________________________________
File system: vfat
Boot sector type: MSWIN4.1: FAT32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files: /boot/grub/grub.cfg /efi/boot/bootaa64.efi
/efi/boot/grubaa64.efi /efi/boot/mmaa64.efi
================================ 3 OS detected =================================
OS#1 (linux): Ubuntu 26.04 LTS on nvme0n1p5
OS#2 (windows): Windows XP on nvme0n1p3
OS#3 (linux): Ubuntu 26.04 LTS on nvme0n1p6
================================ Host/Hardware =================================
CPU architecture: 64-bit
Video: msmdrmfb from
Live-session OS is Ubuntu 64-bit (Ubuntu 26.04 LTS, resolute, aarch64)
===================================== UEFI =====================================
BIOS/UEFI firmware: PUCN52WW(1.52) from LENOVO
The firmware is EFI-compatible, and is set in EFI-mode for this live-session.
SecureBoot disabled (confirmed by mokutil).
BootCurrent: 0002
Timeout: 0 seconds
BootOrder: 0004,0002,0003,0000,0001
Boot0000* EFI PXE 0 for IPv4 (00-E0-4C-68-00-FC) Pci(0x83,0x0)/USB(2,0)/MAC(00e04c6800fc,0)/IPv4(0.0.0.0,0,DHCP,0.0.0.0,0.0.0.0,0.0.0.0)RC
Boot0001* EFI PXE 0 for IPv6 (00-E0-4C-68-00-FC) Pci(0x83,0x0)/USB(2,0)/MAC(00e04c6800fc,0)/IPv6([::],0,Static,[::],[::],64)RC
Boot0002* EFI USB Device (VendorCoProductCode) UsbWwid(48d,1234,0,739509106047818263)/HD(1,MBR,0x40897,0x800,0xea5f7c0)RC
Boot0003* Windows Boot Manager HD(1,GPT,60cb83e9-fecb-4b3b-bf49-0520b99a7651,0x800,0x82000)/\EFI\Microsoft\Boot\bootmgfw.efi57494e444f5753000100000088000000780000004200430044004f0042004a004500430054003d007b00390064006500610038003600320063002d0035006300640064002d0034006500370030002d0061006300630031002d006600330032006200330034003400640034003700390035007d00000000000100000010000000040000007fff0400
Boot0004* Ubuntu HD(1,GPT,60cb83e9-fecb-4b3b-bf49-0520b99a7651,0x800,0x82000)/\EFI\ubuntu\shimaa64.efi
5311ef1dcc722e2a346bb2e435f6e1a6 nvme0n1p1/Boot/bootaa64.efi
ee463c7755b55f597aca78928e3ac117 nvme0n1p1/Boot/fbaa64.efi
5ba1de5ebea6ce991e3a6684451fc8eb nvme0n1p1/Boot/mmaa64.efi
ef4ecaf9633b8096dbc15cd8d1f0e172 nvme0n1p1/ubuntu/grubaa64.efi
5ba1de5ebea6ce991e3a6684451fc8eb nvme0n1p1/ubuntu/mmaa64.efi
5311ef1dcc722e2a346bb2e435f6e1a6 nvme0n1p1/ubuntu/shimaa64.efi
421abc202e187fc9a6d6075ccaebc112 nvme0n1p1/Microsoft/Boot/SecureBootRecovery.efi
4ff7f1d7fab04619edd60e0bbb87aaec nvme0n1p1/Microsoft/Boot/bootmgfw.efi
00a82d28cb015f8eefd77127ffcfc33b nvme0n1p1/Microsoft/Boot/bootmgr.efi
============================= Drive/Partition Info =============================
Disks info: ____________________________________________________________________
nvme0n1 : is-GPT, no-BIOSboot, has---ESP, not-usb, not-mmc, has-os, has-win, 2048 sectors * 512 bytes
Partitions info (1/3): _________________________________________________________
nvme0n1p1 : no-os, 64, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far
nvme0n1p3 : is-os, 64, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, end-after-100GB
nvme0n1p4 : no-os, 64, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, end-after-100GB
nvme0n1p5 : is-os, 64, apt-get, signed grub-efi , grub2, grub-install, grubenv-ng, update-grub, end-after-100GB
nvme0n1p6 : is-os, 64, apt-get, signed grub-efi , grub2, grub-install, grubenv-ok, update-grub, end-after-100GB
Partitions info (2/3): _________________________________________________________
nvme0n1p1 : is---ESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, vfat
nvme0n1p3 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, ntfs
nvme0n1p4 : isnotESP, part-has-no-fstab, no-nt, no-winload, recovery-or-hidden, no-bmgr, notwinboot, ntfs
nvme0n1p5 : isnotESP, fstab-has-bad-efi, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, ext4
nvme0n1p6 : isnotESP, fstab-has-bad-efi, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, ext4
Partitions info (3/3): _________________________________________________________
nvme0n1p1 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, nvme0n1
nvme0n1p3 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, nvme0n1
nvme0n1p4 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, nvme0n1
nvme0n1p5 : not--sepboot, with-boot, fstab-without-boot, not-sep-usr, with--usr, fstab-without-usr, std-grub.d, nvme0n1
nvme0n1p6 : not--sepboot, with-boot, fstab-without-boot, not-sep-usr, with--usr, fstab-without-usr, std-grub.d, nvme0n1
fdisk -l (filtered): ___________________________________________________________
Disk nvme0n1: 476.94 GiB, 512110190592 bytes, 1000215216 sectors
Disk identifier: 0DA23CA8-E04F-4C63-A8DC-ECCE816B0148
Start End Sectors Size Type
nvme0n1p1 2048 534527 532480 260M EFI System
nvme0n1p2 534528 567295 32768 16M Microsoft reserved
nvme0n1p3 567296 381716479 381149184 181.7G Microsoft basic data
nvme0n1p4 996118528 1000214527 4096000 2G Windows recovery environment
nvme0n1p5 381716480 426598399 44881920 21.4G Linux filesystem
nvme0n1p6 426598400 996118527 569520128 271.6G Linux filesystem
Partition table entries are not in disk order.
Disk sda: 117.19 GiB, 125829120000 bytes, 245760000 sectors
Disk identifier: 0x00040897
Boot Start End Sectors Size Id Type
sda1 * 2048 245759935 245757888 117.2G c W95 FAT32 (LBA)
parted -lm (filtered): _________________________________________________________
sda:126GB:scsi:512:512:msdos:VendorCo ProductCode:;
1:1049kB:126GB:126GB:fat32::boot, lba;
nvme0n1:512GB:nvme:512:512:gpt:SKHynix_HFS512GEM4X182N:;
1:1049kB:274MB:273MB:fat32:EFI system partition:boot, esp;
2:274MB:290MB:16.8MB::Microsoft reserved partition:msftres;
3:290MB:195GB:195GB:ntfs:Basic data partition:msftdata;
5:195GB:218GB:23.0GB:ext4::;
6:218GB:510GB:292GB:ext4::;
4:510GB:512GB:2097MB:ntfs:Basic data partition:hidden, diag, no_automount;
blkid (filtered): ______________________________________________________________
NAME FSTYPE UUID PARTUUID LABEL PARTLABEL
sda
└─sda1 vfat 171C-2E46 00040897-01 UBUNTU_26_0
nvme0n1
├─nvme0n1p1 vfat E802-977A 60cb83e9-fecb-4b3b-bf49-0520b99a7651 SYSTEM_DRV EFI system partition
├─nvme0n1p2 65a7040b-ca4b-42a4-9075-e854e618474d Microsoft reserved partition
├─nvme0n1p3 ntfs A6CE031ECE02E701 2d9f7f8b-d872-46d9-a41d-abe706777727 Windows-SSD Basic data partition
├─nvme0n1p4 ntfs 04AA039FAA038BFC e40ef07d-666e-41f9-bf34-9a81cb86219f WINRE_DRV Basic data partition
├─nvme0n1p5 ext4 ab513327-e213-4312-b5d7-2a09d85daa27 9db09800-0418-4f4d-9618-6777aad33ad6
└─nvme0n1p6 ext4 d0f67a9b-cacc-4bc1-9fe0-4d5ee01b5ea4 a75a3b8f-8cc7-4657-98f7-aef55cf0e426
Mount points (filtered): _______________________________________________________
Avail Use% Mounted on
/dev/nvme0n1p1 149.9M 41% /target/boot/efi
/dev/nvme0n1p3 103.4G 43% /mnt/boot-sav/nvme0n1p3
/dev/nvme0n1p4 1.2G 40% /mnt/boot-sav/nvme0n1p4
/dev/nvme0n1p5 4.9G 70% /mnt/boot-sav/nvme0n1p5
/dev/nvme0n1p6 238.6G 5% /target
/dev/sda1 113.3G 3% /cdrom
/dev/sda1 113.3G 3% /target/cdrom
/dev/sda1 113.3G 3% /tmp/tmp6wm9yi_c/mount/cdrom
overlay 0 100% /tmp/tmp3gxllwgw/root.dir
overlay 15.1G 2% /tmp/tmp6wm9yi_c/mount
overlay 15.1G 2% /tmp/tmpmn70uxt4/mount
overlay 15.1G 2% /tmp/tmpzcouihwr/mount
Mount options (filtered): ______________________________________________________
/dev/nvme0n1p1 vfat rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro
/dev/nvme0n1p3 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
/dev/nvme0n1p4 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
/dev/nvme0n1p5 ext4 rw,relatime
/dev/nvme0n1p6 ext4 rw,relatime
/dev/sda1 vfat ro,noatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro
/dev/sda1 vfat ro,noatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro
/dev/sda1 vfat ro,noatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro
overlay overlay rw,relatime,lowerdir=/tmp/tmp3gxllwgw/root.dir,upperdir=/tmp/tmpzcouihwr/upper,workdir=/tmp/tmpzcouihwr/work,uuid=on,xino=off,nouserxattr
overlay overlay rw,relatime,lowerdir=/tmp/tmpmgwvkx_c/root.dir,upperdir=/tmp/tmpmn70uxt4/upper,workdir=/tmp/tmpmn70uxt4/work,uuid=on,xino=off,nouserxattr
overlay overlay rw,relatime,lowerdir=/tmp/tmpmn70uxt4/upper:/tmp/tmpmgwvkx_c/root.dir,upperdir=/tmp/tmp6wm9yi_c/upper,workdir=/tmp/tmp6wm9yi_c/work,uuid=on,xino=off,nouserxattr
=================== nvme0n1p5/boot/grub/grub.cfg (filtered) ====================
Ubuntu ab513327-e213-4312-b5d7-2a09d85daa27
Windows Boot Manager (on nvme0n1p1) osprober-efi-E802-977A
### END /etc/grub.d/30_os-prober ###
UEFI Firmware Settings uefi-firmware
### END /etc/grub.d/30_uefi-firmware ###
======================== nvme0n1p5/etc/fstab (filtered) ========================
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/nvme0n1p5 during curtin installation
/dev/disk/by-uuid/ab513327-e213-4312-b5d7-2a09d85daa27 / ext4 defaults 0 1
# /boot/efi was on /dev/nvme0n1p1 during curtin installation
/dev/disk/by-uuid/E802-977A /boot/efi vfat defaults 0 1
/swap.img none swap sw 0 0
==================== nvme0n1p5/etc/default/grub (filtered) =====================
GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`( . /etc/os-release && echo ${NAME} )`
GRUB_CMDLINE_LINUX_DEFAULT="console=tty0"
GRUB_CMDLINE_LINUX=""
================= nvme0n1p5: Location of files loaded by Grub ==================
GiB - GB File Fragment(s)
196.075561523 = 210.534531072 boot/grub/grub.cfg 1
182.234107971 = 195.672383488 boot/vmlinuz 1
182.234107971 = 195.672383488 boot/vmlinuz-7.0.0-14-generic 1
182.234107971 = 195.672383488 boot/vmlinuz.old 1
196.176479340 = 210.642890752 boot/initrd.img 1
196.176479340 = 210.642890752 boot/initrd.img-7.0.0-14-generic 1
196.176479340 = 210.642890752 boot/initrd.img.old 1
=================== nvme0n1p5: ls -l /etc/grub.d/ (filtered) ===================
-rwxr-xr-x 1 root root 17611 Mar 6 15:04 10_linux
-rwxr-xr-x 1 root root 42690 Mar 6 15:04 10_linux_zfs
-rwxr-xr-x 1 root root 14430 Mar 6 15:04 20_linux_xen
-rwxr-xr-x 1 root root 13619 Mar 6 15:04 30_os-prober
-rwxr-xr-x 1 root root 1174 Mar 6 15:04 30_uefi-firmware
-rwxr-xr-x 1 root root 744 Apr 17 20:44 35_fwupd
-rwxr-xr-x 1 root root 214 Mar 6 15:04 40_custom
-rwxr-xr-x 1 root root 215 Mar 6 15:04 41_custom
=================== nvme0n1p6/boot/grub/grub.cfg (filtered) ====================
Ubuntu d0f67a9b-cacc-4bc1-9fe0-4d5ee01b5ea4
Windows Boot Manager (on nvme0n1p1) osprober-efi-E802-977A
Ubuntu 26.04 LTS (26.04) (on nvme0n1p5) ab513327-e213-4312-b5d7-2a09d85daa27
### END /etc/grub.d/30_os-prober ###
UEFI Firmware Settings uefi-firmware
### END /etc/grub.d/30_uefi-firmware ###
======================== nvme0n1p6/etc/fstab (filtered) ========================
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/nvme0n1p6 during curtin installation
/dev/disk/by-uuid/d0f67a9b-cacc-4bc1-9fe0-4d5ee01b5ea4 / ext4 defaults 0 1
# /boot/efi was on /dev/nvme0n1p1 during curtin installation
/dev/disk/by-uuid/E802-977A /boot/efi vfat defaults 0 1
/swap.img none swap sw 0 0
==================== nvme0n1p6/etc/default/grub (filtered) =====================
GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`( . /etc/os-release && echo ${NAME} )`
GRUB_CMDLINE_LINUX_DEFAULT="console=tty0"
GRUB_CMDLINE_LINUX=""
================= nvme0n1p6: Location of files loaded by Grub ==================
GiB - GB File Fragment(s)
364.666625977 = 391.557808128 boot/grub/grub.cfg 1
203.635475159 = 218.651926528 boot/vmlinuz 1
203.635475159 = 218.651926528 boot/vmlinuz-7.0.0-14-generic 1
203.635475159 = 218.651926528 boot/vmlinuz.old 1
426.174774170 = 457.601679360 boot/initrd.img 2
426.174774170 = 457.601679360 boot/initrd.img-7.0.0-14-generic 2
426.174774170 = 457.601679360 boot/initrd.img.old 2
=================== nvme0n1p6: ls -l /etc/grub.d/ (filtered) ===================
-rwxr-xr-x 1 root root 17611 Mar 6 15:04 10_linux
-rwxr-xr-x 1 root root 42690 Mar 6 15:04 10_linux_zfs
-rwxr-xr-x 1 root root 14430 Mar 6 15:04 20_linux_xen
-rwxr-xr-x 1 root root 13619 Mar 6 15:04 30_os-prober
-rwxr-xr-x 1 root root 1174 Mar 6 15:04 30_uefi-firmware
-rwxr-xr-x 1 root root 744 Apr 17 20:44 35_fwupd
-rwxr-xr-x 1 root root 214 Mar 6 15:04 40_custom
-rwxr-xr-x 1 root root 215 Mar 6 15:04 41_custom
====================== sda1/boot/grub/grub.cfg (filtered) ======================
Try or Install Ubuntu
Try or Install Acer Swift Go 14 AI (SFG14-01)
Try or Install ASUS Vivobook S15 x1p42100
Try or Install HP Omnibook X14-fe1 x1p4200
Try or Install Lenovo Ideapad 5 2in1
Try or Install Lenovo Ideapad Slim 3
Try or Install Lenovo Ideapad Slim 5x (OLED)
Try or Install Lenovo Ideapad Slim 5x (LCD)
Try or Install Medion SPRCHRGD 14 S1
Try or Install Microsoft Surface Pro 11 X1E-80-100 OLED
Try or Install Microsoft Surface Pro 11 X1P-64-100 LCD
Try or Install Microsoft Surface Pro 12 inch
Try or Install Microsoft Windows Dev Kit 2023
UEFI shell
Boot from next volume
UEFI Firmware Settings
==================== sda1: Location of files loaded by Grub ====================
GiB - GB File Fragment(s)
?? = ?? boot/grub/grub.cfg 1
Suggested repair: ______________________________________________________________
The default repair of the Boot-Repair utility would purge (in order to unsign) and reinstall the grub-efi of
nvme0n1p5,
using the following options: nvme0n1p1/boot/efi
Additional repair would be performed: unhide-bootmenu-10s use-standard-efi-file
Blockers in case of suggested repair: __________________________________________
/target detected. Please close the Ubuntu installer, then retry. 64bits detected. Please use this software in a 64bits session. (Please use Boot-Repair-Disk-64bit (www.sourceforge.net/p/boot-repair-cd) which contains a 64bits-compatible version of this software.) This will enable this feature.
Final advice in case of suggested repair: ______________________________________
Please do not forget to make your UEFI firmware boot on the Ubuntu 26.04 LTS entry (nvme0n1p1/efi/****/grub****.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\****\grub****.efi (**** will be updated in the final message)Conseils pour les nouveaux demandeurs et pas qu'eux
Important : Pensez à passer vos sujets en [ Résolu ] lorsque ceux-ci le sont, au début du titre en cliquant sur Modifier sous le premier message, et un bref récapitulatif de la solution à la fin de celui-ci. Merci. Membre de Linux-Azur
Hors ligne
#4 Le 02/06/2026, à 23:23
- pthenot
Re : Impossible de rebooter Lenovo IdeaPad Slim équipé d'un snapdragon
Merci à geole et xubu 1957,
Quand j'aurai du temps je teste rEFInd.
Je ne risque rien car c'est un ordinateur de travail et pour qu'il ait l'autorisation de travailler il faut qu'il ait ubuntu autrement placard!
Je vous tiens informé,
Bonne soirée et merci à tous
Hors ligne