189507a35d
The serial output (but it's named console, not serial actually) causes issues on U-Boot's EFI, at the very least. This is inspired by OpenSUSE's approach: * https://build.opensuse.org/package/view_file/Base:System/grub2/grub2-SUSE-Add-the-t-hotkey.patch Where they add a hidden menu entry, which can be used to force the console output. The `echo` will be visible on the serial terminal (grub "console"), while the graphical interface is shown. Note that input in the serial terminal (grub "console") will continue controlling the graphical interface. Useful if you have an SBC connectedinto an HDMI monitor, but no keyboard connected to it.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at https://nixos.org/nixos and in the manual in doc/manual.