thinkpad/t495: fix backlight save/load and and battery conditioning.
Saving/loading the backlight state requires the acpi_backlight=native kernel parameter. acpi_call is required by TLP to get access to battery conditioning information from the firmware. Signed-off-by: David Anderson <dave@natulte.net>
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@ -4,8 +4,13 @@
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imports = [
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../.
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../../../common/cpu/amd
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../../../common/pc/laptop/acpi_call.nix
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];
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# Force use of the thinkpad_acpi driver for backlight control.
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# This allows the backlight save/load systemd service to work.
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boot.kernelParams = [ "acpi_backlight=native" ];
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# see https://github.com/NixOS/nixpkgs/issues/69289
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boot.kernelPackages = lib.mkIf (lib.versionOlder pkgs.linux.version "5.2") pkgs.linuxPackages_latest;
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}
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