我遇到的问题是，每次启动笔记本电脑时都会显示启动菜单，我必须选择要使用 Ubuntu。我搜索了网络，发现其他人也有同样的问题，但是对他们有用的解决方案（将计时器设置为 0）对我不起作用。
我已尝试过：
sudo nano /etc/default/grub
GRUB_TIMEOUT=0
然后我就跑了sudo update-grub。
我仍然有这个问题。我运行的是全新安装的 Ubuntu 18.04.2。
该文件如下所示：
# 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=countdown
GRUB_TIMEOUT=0.1
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
您尝试过的：
sudo nano /etc/default/grub
GRUB_TIMEOUT=0
然后运行sudo update-grub
不起作用，因为 grub 会自动将时间从零改为 10。您需要执行以下操作：
sudo nano /etc/default/grub
GRUB_RECORDFAIL_TIMEOUT=0.1
GRUB_TIMEOUT=0.1
然后运行sudo update-grub