Can't change BIOS order

So I'm having a dual boot system (Windows and Ubuntu) and since I disassembled my laptop some hours ago the laptop boots directly into Windows (ignoring the GRUB OS selection screen).

I'm having a Lenovo Laptop with Windows 10 (Insider Preview) and a Samsung EVO 840 SSD on which my both OSs are installed.

When booting into BIOS I can't change the order of booting (Windows is stuck at the 1st position).

Any idea on how to solve this?

You need to update the boot file location.

I use rEFInd not grub so (from Windows Administrator command prompt) I run this whenever Windows resets it which it does on occasion.

Code:

bcdedit /set {bootmgr} path \EFI\refind\refind_x64.efi

You probably want to do something like this (again from windows command prompt).

Code:

bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi

If you can't remember or don't know where you installed grub (or what the name is) then mount the ESP and have a look - your loader will be in the EFI directory somewhere.

It sounds as if you need to edit the Grub menu in order to offer you a choice of which OS to load. See the article at How to Configure the GRUB2 Boot Loaders Settings which gives a full explanation. If you are having difficulty in launching Ubuntu, then try holding Shift whilst booting the PC.

MikeinGrange said:

It sounds as if you need to edit the Grub menu

The OP is booting straight into Windows.

I mounted the EFI partition in "B" so I get this

B:\> bcdedit /set {bootmgr} path B:\EFI\ubuntu\grubx64.efi
The set command specified is not valid.
Run "bcdedit /?" for command line assistance.
The parameter is incorrect.

doriandiaconu said:

B:\> bcdedit /set {bootmgr} path B:\EFI\ubuntu\grubx64.efi

You don't need that B:

You are telling the firmware about what directory inside the ESF to use - it doesn't know anything about Windows Drive letters.

Just put this

bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi

This is assuming there is such a program in B:\EFI\ubuntu directory

PS B:\> bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi
The set command specified is not valid.
Run "bcdedit /?" for command line assistance.
The parameter is incorrect.

Exactly - doesn't work in powershell

It worked. Thank you!