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>
14 lines
467 B
Nix
14 lines
467 B
Nix
# Boot via coreboot's GRUB payload (e.g. libreboot default). The GRUB in the
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# flash chip reads the grub.cfg that NixOS generates on disk, so GRUB here is
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# config-only -- it is NOT installed to any disk MBR (`device = "nodev"`).
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#
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# Your coreboot grub.cfg must locate and load the on-disk config, e.g. search
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# for and `configfile` /boot/grub/grub.cfg (or chainload the disk's GRUB).
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{ ... }:
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{
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boot.loader.grub = {
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enable = true;
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device = "nodev";
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};
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}
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