This is a known bug with many other HP laptops, particularly those older with very buggy UEFI implementation (namely HP Elitebook 8460p, 8470p, 2170p, 2560p, 2570p...), basically all the Sandy Bridge + Ivy Bridge era business laptops seem to be affected.

Not just it ignores EFI files elsewhere but in the one single expected location of Windows bootloader, it also fails to have any records set by `efibootmgr` tool. Normally Linux sets there its record such as ubuntu or debian and sets it as default in the BootOrder. Try setting anything there on such laptops, and even if you succeed to set anything, on boot it is completely ignored.

There is one other way how to actually boot not from the filepath of the Windows EFI file, but via "Customized Boot" option. You need to know first the exact location of the EFI file you want to boot on the ESP partition and enter it blindly in HP UEFI interface in Customized Boot using backslashes, not forward slashes, and set Customized Boot as the default boot option from within HP UEFI GUI.

Example when Secure boot on for Ubuntu: EFI\ubuntu\shimx64.efi

or Debian/Devuan:EFI\devuan\shimx64.efi

When not using Secure Boot: you can replace shimx64.efi for grubx64.efi.

Other documentation of these quirks: https://askubuntu.com/questions/554690/ … omatically