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add Dell Pro 14 PA14250 #1534

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39 changes: 39 additions & 0 deletions dell/dell-pro/PA14250/default.nix
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{ lib, ... }:

{
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Please also add this to the README.md and flake.nix

imports = [
../../../common/cpu/intel/lunar-lake
../../../common/pc/laptop
../../../common/pc/ssd
];

hardware.intelgpu.driver = "xe";
# use xe graphics module, i915 doesn't seem to work well
# just selecting xe seems to be not enough
boot.blacklistedKernelModules = [ "i915" ];

boot.kernelParams = [
# makes external display more stable
"xe.psr_safest_params=1"
# extra debug logs just in case something breaks
"xe.verbose_state_checks=true"
];

# 6.15.5 and 6.12.34 seems to work, newer versions in 25.05 fail to load graphics
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@Mic92 Mic92 Jul 21, 2025 •
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So kernel newer than 6.12.34 are broken? this makes it a bit hard to deploy this. Does _latest work? Otherwise people would need to compile kernel manually.

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Yes, latest works so far (6.15.7), I was hoping it'd soon get fixed in 6.12 series. But just tried 6.12.39 - still doesn't work

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Any downsides with just depending on linuxPackages_latest as the default?

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Don't know what's common & recommended in nixos-hardware, but currently that's what I'm using so won't mind a default

# TODO: find or file upstream issue
# meanwhile on 25.05 you can use
# boot.kernelPackages = pkgs.linuxPackages_latest;
assertions = [
{
assertion = config.boot.kernelPackages.kernel.version != "6.12.35";
message = "probe with driver xe failed with error -110";
}
{
assertion = config.boot.kernelPackages.kernel.version != "6.12.36";
message = "probe with driver xe failed with error -110";
}
];

# Recommended in NixOS/nixos-hardware#127
services.thermald.enable = lib.mkDefault true;
}