Hi, i should have looked into the boot/grub/grub.cfg file for initrd usage:
... menuentry "Debian GNU/Linux Live (kernel 5.10.0-18-amd64)" { linux /live/vmlinuz-5.10.0-18-amd64 boot=live components splash quiet "${loopback}" initrd /live/initrd.img-5.10.0-18-amd64 } ... many language choices with the same initrd ... menuentry "Graphical Debian Installer" { linux /d-i/gtk/vmlinuz append video=vesa:ywrap,mtrr vga=788 "${loopback}" initrd /d-i/gtk/initrd.gz } menuentry "Debian Installer" { linux /d-i/vmlinuz "${loopback}" initrd /d-i/initrd.gz } ... So which GRUB menu item did you choose in your test whether your preseed.cfg in /d-i/initrd.gz works ? Only "Debian Installer" uses it. "Live" and "Graphical Debian Installer" use the other two. Have a nice day :) Thomas