Capture two swipes of the SAME physical distance: one slow (about 2 seconds) and one fast (under 0.5 seconds). A sensor without acceleration will report the same pixel distance for both. Ratios above 1.05 mean acceleration is being applied.
Step 1: Press and hold, drag slowly across the pad (about 2 seconds).
Slow swipe
Pixels-
Duration-
Speed (px/s)-
Fast swipe
Pixels-
Duration-
Speed (px/s)-
Fast / slow pixel ratio
-
Drag slowly first, then drag fast.
Tip: Windows "Enhance pointer precision" is the most common source of acceleration. Turn it off in Control Panel > Mouse > Pointer Options. Some gaming mice also have firmware acceleration on high polling rates — check the driver app.