windows - bcdedit doesn't change the boot entry with a valid path

I installed a W10 / Ubuntu dualboot with uefi on my laptop.

But when I turn on my PC, there is no grub and it automatically boot on windows 10.

When I press the Boot option, then manually select the good efi file (the ubuntu one)

It works and I have my grub (with ubuntu + windows)

So I tried to change the boot entry with bcdedit like that (in a windows cmd):

bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi

But I doesn't change anything, and the computer still boot automatically on windows 10.

How can I boot on my shimx64.efi when I turn on my computer ?