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power: drop the disk swapfile and hibernate

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Remove the 58 GiB swapfile on the LUKS root, along with what depended
on it: resumeDevice, resume_offset, the suspend-then-hibernate logind
actions and HibernateDelaySec. zram is now the only swap, capped at
8 GiB so it can't cut into memory needed for large LLM/GTT loads.

Lid, idle and the suspend key now do plain s2idle suspend; the power
key powers off. This loses the hibernate fallback that used to end a
spurious-wake loop; acpi.ec_no_wakeup=1 and the gsd-power tweaks are
now all that keeps s2idle stable.

Assisted-by: Claude:opus-5-5
This commit is contained in:
Sergei Poljanski 2026-11-08 05:08:45 +04:00
commit 4fb583cf54
Signed by: asxpi
GPG key ID: 4F8851660FA4121B
2 changed files with 19 additions and 36 deletions
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7
hardware-configuration.nix
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@ -40,11 +40,8 @@
options = [ "nofail" ];
};
# Encrypted swapfile on LUKS root, sized for hibernate (RAM + headroom).
# NixOS auto-creates the file and computes resume offset on activation.
swapDevices = [
{ device = "/var/swapfile"; size = 59392; } # 58 GiB, RAM is 54 GiB
];
# No disk swap: zram only (modules/power.nix). Hibernate disabled.
swapDevices = [ ];
nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;