I have dual boot config Archlinux/Windows7 and latest packages. I am booted into grub rescue mode. Or use command line. I want to tell Grub2 to load Windows Boot Loader bootmgfw.efi. Basically grub2 refuses to do it with error "invalid root device".
Steps to reproduce:
> set root=(hd1,gpt7)
> chainloader /EFI/Microsoft/Boot/bootmgfw.efi
Screen is flashing with "invalid root device".
So grub2 finds bootmgfw.efi but cannot give it control. I tried every other hd1,gpt combination to no avail. I also tried setting root to one device and loading bootmgfw.efi from another device(hd1,gpt7).
It's strange because I can load this file from shell (shellx64.efi) within UEFI BIOS without error. Any advice is appreciated.