Emma Thorpe
b3fa34f431
Split the T400 bootloader into self-contained, importable modules so the host
can match whatever firmware is flashed (switch by changing one import):
- boot-bios.nix stock BIOS / coreboot+SeaBIOS -> GRUB on the MBR (default)
- boot-coreboot-grub.nix coreboot GRUB payload -> config-only GRUB (device=nodev)
- boot-coreboot-uefi.nix coreboot Tianocore/UEFI payload -> systemd-boot; carries
its own ESP (/boot vfat) so it travels with the mode
Cover the optional discrete ATI Mobility Radeon HD 3470 (RV620): load the open
`radeon` KMS driver in the initrd for early modesetting (firmware via
enableRedistributableFirmware), with a note on the T400's switchable graphics.
All three boot variants evaluate; nixfmt clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
nixfiles
NixOS / nix-darwin / home-manager configuration for all hosts, built from a single flake.
Hosts
Defined in the host table in flake.nix:
| Configuration | System | Machine |
|---|---|---|
lyrathorpe-mbp |
aarch64-linux |
MacBook Pro (Apple Silicon, Asahi) |
lyrathorpe-x1c |
x86_64-linux |
ThinkPad X1 |
emmathorpe-edaas |
x86_64-linux |
Work WSL box (NixOS-WSL) |
lyrathorpe-mac |
aarch64-darwin |
macOS (nix-darwin) |
Shared layers: lyrathorpe/home (home-manager: shell, git, editor),
system/modules/common-nixos.nix (all NixOS hosts), and
system/modules/laptop.nix (the physical laptops).
Applying
# NixOS
sudo nixos-rebuild switch --flake .#<configuration>
# Darwin
darwin-rebuild switch --flake .#lyrathorpe-mac
MacBook (Asahi) firmware
The MBP host references system/modules/firmware/ for Apple peripheral
firmware (Wi-Fi/Bluetooth). Those blobs are not redistributable, so the
directory is gitignored and a clean checkout will not build lyrathorpe-mbp
until it is populated out-of-band.
Copy the firmware extracted during the Asahi install (from
/etc/nixos/firmware on the freshly-installed machine, or re-extract per the
Asahi NixOS docs) into
system/modules/firmware/ before rebuilding that host.
CI
.gitea/workflows/ci.yaml gates nixfmt
formatting and evaluates every NixOS and Darwin host configuration on push/PR.