Grub menu not showing after ubuntu installation [closed]

Guys my laptop had only windows 8 version. Recently I installed Ubuntu 18.10 version in it. But the problem is it is now booting directly to windows.

As seen in forms I tried turning off secure boot and fast boot but still the problem remains.

Solution 1:

I have used boot-repair before to successfully fix these sorts of dual-boot issues, see here:

How can I repair grub? (How to get Ubuntu back after installing Windows?)

Solution 2:

Other than @codlord answer (that in my opinion should be the first thing to do), maybe there is the chance that GRUB menu is hidden and Windows is the default: this means that you cannot select Ubuntu because you cannot see the GRUB menu.

If boot-repair doesn't help you, try to open as root the file /etc/default/grub and find the following variables:

GRUB_HIDDEN_TIMEOUT
GRUB_TIMEOUT_STYLE

if GRUB_HIDDEN_TIMEOUT exists, comment it with a #

Also, set GRUB_TIMEOUT_STYLE=menu (maybe it is currently set in your machine as "hidden")

After saving the file, run sudo update-grub and reboot.