lenovo/thinkpad/e495: use native acpi backlight

2021-08-18 11:58:49 +02:00 · 2021-08-18 11:58:49 +02:00 · eb385fad1e
parent 566f4da366
commit eb385fad1e
1 changed files with 6 additions and 0 deletions
--- a/lenovo/thinkpad/e495/default.nix
+++ b/lenovo/thinkpad/e495/default.nix
@ -8,4 +8,10 @@

  # see https://github.com/NixOS/nixpkgs/issues/69289
  boot.kernelPackages = lib.mkIf (lib.versionOlder pkgs.linux.version "5.2") pkgs.linuxPackages_latest;
+
+  boot.kernelParams = [
+    # Force use of the thinkpad_acpi driver for backlight control.
+    # This allows the backlight save/load systemd service to work.
+    "acpi_backlight=native"
+  ];
 }