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-rw-r--r--lenovo/thinkpad/t495/default.nix5
1 files changed, 5 insertions, 0 deletions
diff --git a/lenovo/thinkpad/t495/default.nix b/lenovo/thinkpad/t495/default.nix
index 51ddb5c..64957e6 100644
--- a/lenovo/thinkpad/t495/default.nix
+++ b/lenovo/thinkpad/t495/default.nix
@@ -4,8 +4,13 @@
imports = [
../.
../../../common/cpu/amd
+ ../../../common/pc/laptop/acpi_call.nix
];
+ # Force use of the thinkpad_acpi driver for backlight control.
+ # This allows the backlight save/load systemd service to work.
+ boot.kernelParams = [ "acpi_backlight=native" ];
+
# see https://github.com/NixOS/nixpkgs/issues/69289
boot.kernelPackages = lib.mkIf (lib.versionOlder pkgs.linux.version "5.2") pkgs.linuxPackages_latest;
}