Hello! How to set GRUB serial output to EFI serial?
I want to set these terminal settings to GRUB, with the exception that `serial` in this case should be EFI serial port: ``` GRUB_TERMINAL_INPUT="serial console" GRUB_TERMINAL_OUTPUT="serial gfxterm" ``` This setting gives me: ``` grub> terminal_input Active input terminals: serial console Available input terminals: serial_efi0 serial_com0 at_keyboard grub> terminal_output Active output terminals: gfxterm serial Available output terminals: console serial_efi0 serial_com0 spkmodem cbmemc audio ``` It is not possible to set `serial_efi0` in GRUB_TERMINAL_INPUT/GRUB_TERMINAL_OUTPUT (https://github.com/rhboot/grub2/blob/246d69b7ea619fc1e77dcc5960e37aea45a9808c/util/grub-mkconfig.in#L191) Therefore I try to use GRUB_SERIAL_COMMAND: ``` GRUB_TERMINAL_INPUT="serial console" GRUB_TERMINAL_OUTPUT="serial gfxterm" GRUB_SERIAL_COMMAND="serial_efi0" ``` But when I do this, terminal_input and terminal_output for some reason change to `console`: ``` grub> terminal_input Active input terminals: console Available input terminals: serial_efi0 serial_com0 serial at_keyboard grub> terminal_output Active output terminals: console Available output terminals: serial_efi0 serial_com0 gfxterm spkmodem serial cbmemc audio ``` Why is this happening? And how to set up a serial for EFI use? Best regards, Konstantin Aladyshev
