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I am trying to access the GRUB from my ubuntu installation as shown here: How to get to the GRUB menu at boot-time?

But I get the following result. How can I get to the GRUB? Any Idea? SCREENSHOT

Adding the output of cat /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
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="nomodeset"
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"
giulio
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  • The screenshot is not from inside an Ubuntu installation. It is, apparently, a BIOS boot manager. Let Ubuntu boot, and then make the changes, as outlined in the linked question. – mikewhatever Apr 19 '19 at 18:20
  • Thanks for the comment. My problem is actually a little bit more complicated. I am trying to install Ubuntuon ASUS Zenbook, but after the installation I got a blank screen: https://www.reddit.com/r/linuxhardware/comments/a3ddg6/anyone_installed_linux_on_a_asus_zenbook_pro_1415/ – giulio Apr 19 '19 at 18:26
  • You should have posted your whole problem not just a part. – knoftrix Apr 19 '19 at 18:49

2 Answers2

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This screenshot shows the boot device selection menu from bios. Once you select the first option, grub is loaded. Press ESC quick and you should be able to access grub.

Peter Liedler
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  • No results... apart from the usual blank screen – giulio Apr 19 '19 at 18:35
  • I reinstalled on the same machine. Now none of the methods is working? How should I proceed? – giulio Apr 22 '19 at 11:42
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    I definitely managed to access the grub... howevere aftervarious practical attempts.. I think that is a reallybig issuehincering the adoption of Ubunut systems on Asus Zenbooks – giulio Apr 22 '19 at 11:59
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Note: The screenshot you attached is bios menu for choosing boot device. Select the first option (Ubuntu) then press Shift or Esc to access grub menu.

Here is what I did to make changes permanent. Edit the file /etc/default/grub

sudo nano /etc/default/grub

Then replace

GRUB_TIMEOUT_STYLE=hidden

with

GRUB_TIMEOUT_STYLE=menu

EDIT: If the above line does not exist then add it.

And make sure GRUB_TIMEOUT is not set to 0.

Then run sudo update-grub and then restart you should see grub menu everytime you power on your notebook. To undo the changes replace the file with original contents and run sudo update-grub

knoftrix
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