I am exploring the option on using the mir-kiosk and chromium-mir-kiosk snaps as a base for a signage player. But I would like to make the boot quiet, i.e. as little output on the display as possible until the kiosk snap has started. I would also like to explore the possibility to add a logo or similar image at boot up. How would I go about doing that? I am interesting in running on a small amd64 and maybe on a Raspberry Pi.
For amd64 I have tried to modify grub.cfg in this snap: https://github.com/snapcore/pc-amd64-gadget, by adding “quiet splash” to set cmdline=“root=LABEL=$label snap_core=$snap_core snap_kernel=$snap_kernel ro net.ifnames=0 init=/lib/systemd/systemd console=ttyS0 console=tty1 panic=-1”
But I havn’t gotten it to work, i.e. I still see a lot of output at boot, any idea how to make quiet boot work on amd64?