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tag-icon • tag-icon boot grub2
更新 1

我的 grub 设置里有这个

# 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_STYLE=menu
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=UUID=7e7b14ea-9a18-42f9-ba6c-d62581e038a9"
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"

但启动期间的超时时间为 30 秒。

这个设置有什么问题？

注意：我确实使用以下命令来更新 grub

sudo update-grub

我也运行了这个命令，以防它有帮助，但没有成功。

Sudo update-grub2

我正在使用 Ubuntu 20.04

更新 1

grep -i timeout /boot/grub/grub.cfg
  set timeout=30
  if [ x$feature_timeout_style = xy ] ; then
    set timeout_style=menu
    set timeout=10
  # Fallback normal timeout code in case the timeout_style feature is
    set timeout=10

因此 cfg 是正确的，但超时仍为 30 秒。此行在做什么？我认为这行返回 false，因此超时为 30 秒。

if [ x$feature_timeout_style = xy ] ; then

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