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无法打开 grub 菜单

tag-icon • tag-icon boot grub2 kernel shortcut-keys suspend
无法打开 grub 菜单

我在 ryzen 5500U 和集成 GPU 上运行 ubuntu 20.04。

尽管我在启动时已经按下了Shift/按钮，但我无法打开 grub 菜单。我想降级我的内核版本，因为挂起后我无法登录，它显示无响应Esc黑屏。

内核版本： 5.14.10-051410-generic

/etc/default/grub文件 ：

# 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=-1
GRUB_TIMEOUT_STYLE=menu
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
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"

答案1

显示 grub 菜单可能比较困难，但是尝试在启动时每半秒按下并释放一次 Esc。

以更长的启动时间为代价，您可以编辑GRUB_TIMEOUT中的值/etc/default/grub以增加几秒钟的等待时间。然后，Grub 将等待一段时间再启动默认条目。在此期间，您可以按Esc或F4，或 按住Shift以显示菜单。

您可以这样做编辑 grub 配置。

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