How to Test Mouse and Trackball Input

Inputs that can be checked

• Left, right, center, back, forward buttons
• Press time and short duplicate clicks
• Direction and amount of vertical and horizontal wheels
• Button state during pointer movement and dragging

Confirmation steps for each symptom

1. Press each button slowly once in the click area.
2. Press the suspect button at regular intervals to see if multiple events are logged at once.
3. Hold down the button and move the pointer to see if the drag state is canceled midway through.
4. Rotate the wheel in one direction and check to see if events from the opposite direction are mixed together.

Precautions when judging results

Pointer speed and acceleration are also affected by OS settings, vendor software, and browser zoom. Before concluding that the mouse is faulty, compare the results using another port, another device, and with the vendor software stopped.

It may not be possible to capture all events for browser operations or OS gestures that are reserved on the page.

Specific example: When left click is input twice without permission

Press the left button 20 to 30 times at regular intervals and check the number of clicks and double-click detection. Change the way you apply force and the position you press to see if it occurs only under specific conditions.

If it reproduces with another USB port, browser, or PC, the device itself is more likely to be the cause. For wireless devices, also check battery level, distance from the receiver, and radio interference.

1. Connect the target mouse or trackball.
2. Press each button individually and check if the display corresponds.
3. Check the click interval, wheel direction, and pointer movement.
4. Compare with another port, device, or piece of hardware to narrow the scope of the symptom.

Your browser or OS may assign back/forward operations to side buttons. Pay attention to page transitions during testing.

Frequently asked questions

Can I measure DPI and polling rate accurately?

Although reference values can be obtained from browser events, we cannot guarantee the same accuracy as a dedicated measuring instrument. Please use it for comparison and symptom confirmation.

Can I check the trackball in the same way?

Clicks, wheels, and pointer movements can be confirmed. The cleaning condition of the ball and the friction of the support ball also affect the feeling of operation.