Ubuntu 22.04 + Windows 10 (dual boot): GRUB not showing and not

Question

After installing Ubuntu 22.04 on a machine which already had Windows installed I can only boot into Ubuntu, but not Windows anymore.

Here is what I did:

• installed Ubuntu 22.04 from here: https://ubuntu.com/download/desktop
• used Rufus to create a bootable USB drive in Windows
• booted from the USB drive to install Ubuntu

I already tried boot-repair, here is the Boot-Info Summary: https://paste.ubuntu.com/p/ywwXxswTqg/

I can see the following text quickly before Ubuntu starts (not sure if it's related or if it helps though):

I also checked the Windows Boot Loader is before ubuntu in my UEFI settings.

How can I boot into Windows again? It would be nice if I got the option to choose what OS to boot (which is what GRUB is for from what I understand). If that's not possible I would at least like to boot into Windows again like before installing Ubuntu.

Answer 1

Turns out the Grub menu didn't show up because of an issue with Grub itself. I had to modify Grub as described in this post:

GRUB_TIMEOUT_STYLE=menu
GRUB_TERMINAL=console