How to test the touchpad
- Connect the controller with a USB data cable or over Bluetooth, click Connect for more tests, and pick it in the browser’s list.
- Draw slow lines across the whole touchpad with one finger: left to right, top to bottom, and into each corner. The traces build up on the pad drawing.
- Put two fingers down and move them together. Each finger gets its own colour, and its ID and coordinates appear under the drawing.
- Press the pad down on the left and on the right. A green frame shows the click, and the readout remembers that it worked.
What to look for
- Gaps in the lines: a straight line with a gap, or a strip nobody can draw in, is a dead zone in the touch sensor. It usually follows a crack or a damaged ribbon cable.
- Jumps: a trace that leaps to another spot while your finger moves smoothly points to a faulty sensor or interference from a damaged touchpad surface.
- Lost fingers: when a finger’s ID changes mid-swipe, the pad lost contact for a moment. Occasional drops at the very edge are normal; drops in the middle are not.
- Click: it should register on both halves. The DualSense’s click is one button under the whole pad, so a click that only works on one side is mechanical: the pad’s hinge or the switch under it.
The dashed centre line marks the split that some games use for a left and a right half.
About the reading
The coordinates come straight from the controller’s reports. Decoded from published formats (the Linux hid-playstation driver and SDL); not yet tested on a real controller. Compare with a game if something looks off. Over Bluetooth, deep mode switches the controller to its full report format until it reconnects, and it asks before doing so: if another app or game stops seeing the controller afterwards, turn the controller off and on. Deep mode works in Chrome, Edge and Opera on a computer. For buttons and sticks, use the PS4 controller tester or the PS5 controller tester.