I tried to get rid of the timer, so grub immediated loads the OS.

This is the file that I edited with

sudo gedit /etc/default/grub
# 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 *original code*
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`

# 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 ...)

# Uncomment to disable graphical terminal (grub-pc only)

# 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'

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux

# Uncomment to disable generation of recovery mode menu entries

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"
  • Did you run sudo update-grub after editing the file? Dual boot? Ubuntu version? Please add information via edit to your question. – mook765 Apr 30 '20 at 20:39
  • 1
    Might be answered here: askubuntu.com/questions/148095/… – user573739 Apr 30 '20 at 22:19

I had the same issue before and wanted to add special background for Grub menu too and i found nice way to solve this issue , Just follow my steps :

1. Install grup customizer but How ? Just open your terminal using Ctrl+Alt+T , then type this commands in your terminal :

sudo add-apt-repository ppa:danielrichter2007/grub-customizer 
sudo apt-get update
sudo apt-get install grub-customizer

2. Press on Windows key , then type Grub.

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3. Go to General settings, Then Boot default entry after and change timer as you want. Here, my timer is 1 seconds.

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4. Click on Save , then Reboot your system and Congrats it's working.

Not Important :
1. If you want to change background , font size , color or anything related to appearance , then Go to Appearance settings, Here is my Grub :

enter image description here

2. Let's assume that you have installed Windows 10 and Ubuntu in your pc and want always to start Windows as Default , So go to List configuration

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Hope that helps you, Good luck.

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