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>
54 lines
2.1 KiB
Nix
54 lines
2.1 KiB
Nix
# ThinkPad T400 (NixOS). Shared laptop options live in ../../modules/laptop.nix;
|
|
# only host-specific settings are here.
|
|
{ ... }:
|
|
|
|
{
|
|
imports = [
|
|
./hardware-configuration.nix
|
|
# Boot: import exactly ONE, matching the firmware currently flashed.
|
|
# Stock Lenovo BIOS and coreboot+SeaBIOS both use boot-bios.nix.
|
|
./boot-bios.nix
|
|
# ./boot-coreboot-grub.nix # coreboot with the GRUB payload (config-only GRUB)
|
|
# ./boot-coreboot-uefi.nix # coreboot with the Tianocore/edk2 UEFI payload
|
|
# # (systemd-boot; carries its own ESP mount)
|
|
];
|
|
|
|
networking.hostName = "T400-NixOS";
|
|
|
|
console.font = "Lat2-Terminus16";
|
|
|
|
services.pipewire = {
|
|
enable = true;
|
|
pulse.enable = true;
|
|
};
|
|
|
|
# This host accepts SSH, so open 22 (the firewall itself is enabled in
|
|
# laptop.nix with a default-deny policy).
|
|
services.openssh.enable = true;
|
|
networking.firewall.allowedTCPPorts = [ 22 ];
|
|
|
|
# The T400's fingerprint reader differs/may be absent; empty service still
|
|
# lets swaylock authenticate via password.
|
|
security.pam.services.swaylock = { };
|
|
|
|
# Intel Core 2 (Penryn) microcode + redistributable firmware. The latter also
|
|
# supplies the iwlwifi blobs (Intel WiFi Link 5100/5300) and the radeon
|
|
# firmware needed by the discrete GPU below.
|
|
hardware.cpu.intel.updateMicrocode = true;
|
|
hardware.enableRedistributableFirmware = true;
|
|
|
|
# This T400 has the optional discrete GPU fitted: an ATI Mobility Radeon HD
|
|
# 3470 (RV620), driven by the open `radeon` KMS driver. Load it in the initrd
|
|
# for early modesetting (clean Sway/Wayland start); firmware comes from
|
|
# enableRedistributableFirmware above.
|
|
#
|
|
# The T400 has switchable graphics (this discrete GPU + the Intel GMA
|
|
# 4500MHD). Select "Discrete" in the firmware's graphics setting so only the
|
|
# ATI is live; if you instead run "Integrated", the Intel i915 driver takes
|
|
# over with no extra config and `radeon` simply stays idle.
|
|
boot.initrd.kernelModules = [ "radeon" ];
|
|
|
|
# See `man configuration.nix` / the stateVersion docs before changing.
|
|
system.stateVersion = "26.05";
|
|
}
|