[F7] = choose boot device
[Del] = Bios interface setup
1.Press "del" on the keyboard quickly to enter the BIOS setup interface.
2.Select to enter the "Boot" option
3.Select the "UEFI NVME Drive BBS Priorities" option
Set Boot option #1 "Ubuntu" as the first boot item by pressing +
6.Press "F4" to save & exit