Grub2 : modifier le délai d’attente avant le choix par défaut de l’OS
Editer le fichier /etc/default/grub
sudo vim /etc/default/grubPasser la valeur GRUB_TIMEOUT à la durée souhaitée en seconde.
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'
GRUB_DEFAULT=0
GRUB_TIMEOUT=3
GRUB_DISTRIBUTOR=<span class="base64" title="PGNvZGUgY2xhc3M9J3NwaXBfY29kZSBzcGlwX2NvZGVfaW5saW5lJyBkaXI9J2x0cic+bHNiX3JlbGVhc2UgLWkgLXMgMiZndDsgL2Rldi9udWxsIHx8IGVjaG8gRGViaWFuPC9jb2RlPg=="></span>
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""
# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"
# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console
# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480
# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true
# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"
# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"Sans effet sur mon OS, seul l’ajout de la variable GRUB_RECORDFAIL_TIMEOUT m’a permis de modifier le délais d’attente :
GRUB_RECORDFAIL_TIMEOUT=3puis appliquer la nouvelle configuration :
sudo update-grub2Si ça ne fonctionne toujours pas, on peut utiliser boot-repair qui va réinstaller grub2 :
https://help.ubuntu.com/community/Boot-Repair
On pourra dans les options avancés choisir la durée du délais d’attente.
