From c1fda700de1c3452cba4949be2b39877b97c8e48 Mon Sep 17 00:00:00 2001
From: Yan Lin <github@yanlincs.com>
Date: Wed, 29 Oct 2025 07:57:45 +0100
Subject: [PATCH] finetune mouse acceleration

---
 hosts/nixos/thinkpad/home.nix   | 8 ++++++++
 hosts/nixos/thinkpad/system.nix | 7 +++++++
 modules/desktop.nix             | 2 +-
 modules/gnome.nix               | 6 ++++++
 4 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/hosts/nixos/thinkpad/home.nix b/hosts/nixos/thinkpad/home.nix
index 9304d7b..9fe3748 100644
--- a/hosts/nixos/thinkpad/home.nix
+++ b/hosts/nixos/thinkpad/home.nix
@@ -15,6 +15,14 @@
     ../../../modules/papis.nix
   ];
 
+  # ThinkPad-specific GNOME dconf overrides
+  dconf.settings = {
+    "org/gnome/desktop/peripherals/mouse" = {
+      speed = 0.0;               # Match libinput accelSpeed for TrackPoint
+      accel-profile = "flat";    # Match libinput accelProfile (no acceleration)
+    };
+  };
+
   programs.yt-dlp-custom = {
     enable = true;
     downloadDir = "~/Downloads/web-video";
diff --git a/hosts/nixos/thinkpad/system.nix b/hosts/nixos/thinkpad/system.nix
index 05481d8..7fae1c4 100644
--- a/hosts/nixos/thinkpad/system.nix
+++ b/hosts/nixos/thinkpad/system.nix
@@ -111,6 +111,13 @@
     accelProfile = "adaptive";
   };
 
+  # TrackPoint configuration (treated as mouse device)
+  services.libinput.mouse = {
+    accelSpeed = "0.0";         # Higher sensitivity for trackpoint (-1.0 to 1.0)
+    accelProfile = "flat";      # No acceleration curve for precise control
+    middleEmulation = false;    # ThinkPad trackpoints have real middle buttons
+  };
+
   # Power management for laptops
   powerManagement = {
     enable = true;
diff --git a/modules/desktop.nix b/modules/desktop.nix
index 8d3dc68..dcf2d6e 100644
--- a/modules/desktop.nix
+++ b/modules/desktop.nix
@@ -72,7 +72,7 @@ in
       enable = true;
       touchpad = {
         naturalScrolling = true;
-        tapping = true;
+        tapping = false;
       };
     };
 
diff --git a/modules/gnome.nix b/modules/gnome.nix
index f42377d..2360388 100644
--- a/modules/gnome.nix
+++ b/modules/gnome.nix
@@ -16,6 +16,12 @@ in
       cursor-theme = "Adwaita";
     };
 
+    # Touchpad settings
+    "org/gnome/desktop/peripherals/touchpad" = {
+      tap-to-click = false;
+      natural-scroll = true;
+    };
+
     # Desktop background
     "org/gnome/desktop/background" = {
       picture-uri = "file:///home/yanlin/Documents/Library/nixos-nineish-dark@4k.png";