I am trying to use a grub splashimage.
The example in the options documentation provides ‘./my-background.png’ as example.
But what is the current working directory in this context? I tried using an absolute path: “/etc/wallpapers/my-background.png”. The file exists and is readable; I am using it in services.xserver.displayManager.lightdm.background, that’s why I am very sure that it’s a valid file. But grub stays in text mode.
Can someone please provide a MWE for a configuration.nix that includes a working grub splashimage? I have browsed dozens of examples from here, Configuration Collection - NixOS Wiki, but none seems to include a splash image?
Followup question: Where is the generated grub configuration file stored? I cannot find it in the filesystem?
NB: The gnome-iso-installer from 22.11 does show a grub splash image on the machine.