This is my computer and I have added a new blank SATA SSD (Disc 0) for installing Ubuntu 20.04 in order to dual boot with Windows 11 Pro pre-installed on SSD (Disc 1) from the factory.
This is before installing Ubuntu.
This is after installing Ubuntu.
Unfortunately, I forgot to change Secure Boot to Disabled before installing Ubuntu by Install Ubuntu alongside Windows Boot Manager. So, the computer still boot Windows without showing grub. I then changed the Secure Boot to Disabled, the computer still boot Windows without showing grub. I have no dare to switch from UEFI to Legacy, is this the correct way ?

