Why Does My Mouse Lag On A Second Monitor? [SOLVED]

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Many people find that once they hook up their laptop to an external monitor, or add an additional display to a setup, their mouse starts to act a little odd. Specifically by beginning to lag when the cursor is moved across to work on the new screen.

In most cases, mouse lag is due to there being a mismatch of the refresh rates between two different monitors. The second most common reason is due to the computer receiving and interpreting the signal from the mouse a little too slowly, normally  a problem with the USB connection. 

Both of these problems can also be easily fixed.

To troubleshoot how to fix your mouse lag below we’ll quickly cover:

  • How to establish why your mouse is lagging on one screen and not the other
  • How to change the refresh rates on your monitors
  • How to solve errors in the connection between your mouse and computer

Reasons why your mouse may be lagging on a second monitor

There are a few reasons why a mouse may be lagging on a second monitor and we’re going to go through each of them here.

If the first solution doesn’t seem to be working, move on and try the next one.

Mismatched refresh rates on your monitors 

The problem we have here is that the Windows operating system isn’t brilliant at dealing with multiple monitor set-ups. 

You will know that the mouse lag is a by-product of a difference in the refresh rates of your monitor if it feels as if the mouse cursor is ‘resisting’, almost as if you need to put in a little bit more effort to move it about when the cursor lands on the second monitor.

There are a few steps that you will need to go through to fix this.

Update your graphic card drivers

Your first job is to ensure that your graphic card drivers are up to date. This is a basic check for which a useful step-by-step guide has been produced by Techddictive.

Adjust the refresh rate

If that doesn’t fix your lag issues, then you are going to need to dive into the display options and start tinkering with your monitor settings. Don’t worry though this is dead simple to do.

This process can vary depending on the operating system that you are using. These instructions work for Windows 10 and the upcoming Windows 11 release:

  • Right-click on a blank spot on your desktop. Select ‘Display Options’
  • Click on the monitor number that is causing you issues.
  • Scroll down and select ‘Advanced Display Options’
  • Select ‘Display Adapter Properties for Display’
  • Select ‘Monitor’
  • Adjust the refresh rate to 60hz (or whatever is the highest frequency that can be matched between the monitors)  and click ‘Save’

If the lag still hasn’t disappeared, then it’s time to check the other monitor using the same steps  to ensure that it is also set to 60hz.

Change the port being used to connect the mouse

If you have a wireless mouse, then there could be some sort of interference that is impacting the connection signal.

Try and change up the USB port that the receiver is plugged into. Sometimes, you’ll find that it doesn’t work brilliantly if it is plugged into a particular port or an external device.

 

Conclusion 

If your mouse seems to be lagging on your second monitor, then it is normally going to be a problem that can be rectified within minutes. 

All it takes is to fix a lagging mouse is to (I) check your graphics card drivers are updated, (II) the refresh rates on your monitors matched, and (III) explore using a different ports on your device.  

If these steps still don’t fix the lag issue then unfortunately you may have a dud product in your hand and it might be worth returning it or splashing out on an upgrade like a gaming mouse. 

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