我的 Lenovo Flex 5 15 上有一個作業系統 - Elementary OS 5（只是基於 Ubuntu 18.04 的眾多發行版之一）。當我打開筆記型電腦時，會出現 Grub v.2.02 啟動選單，我有 30 秒的時間進行選擇（例如，開始載入 Elementary 或 Setup）。
我想跳過此啟動選單並預設啟動 Elementary。我嘗試過編輯/etc/預設/grub，但這並沒有改變什麼。這是我的 /etc/default/grub 內容：
# 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="elementary"
GRUB_HIDDEN_TIMEOUT="0"
GRUB_HIDDEN_TIMEOUT_QUIET="true"
#GRUB_TIMEOUT_STYLE="hidden"
GRUB_TIMEOUT="5"
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"
GRUB_DISABLE_OS_PROBER="true"
我已經嘗試透過 Grub 定制器更改 grub 配置，但沒有成功。這是我更改的選項的螢幕截圖：
