Why Is My USB Mouse Disconnecting When I Use My Laptop Charger? (Solved)
USB Mouse Keeps Disconnecting When Laptop Is Charging – What's Going On?
If your USB mouse disconnects every time you plug in your laptop charger, you are not alone. This strange issue is more common than you think and usually relates to power interference, ground loops, or unstable USB voltage.
Common Causes
- USB port interference due to charger noise or grounding problems
- Low-quality or non-original charging adapter
- Loose or worn-out USB port or connector
- Driver or firmware bugs related to power management
How to Fix It
1. Use a Different USB Port
Try plugging the mouse into a different port, preferably on the opposite side of the laptop. Ports closer to the charging port are more likely to be affected.
2. Disable USB Selective Suspend
On Windows:
- Open Control Panel > Power Options
- Click on Change plan settings
- Select Change advanced power settings
- Find USB settings > USB selective suspend setting
- Set it to Disabled
3. Try a Powered USB Hub
If your laptop can’t provide stable power, use a powered USB hub to isolate the mouse from the laptop’s noisy power delivery.
4. Replace the Charger
A low-quality or incompatible charger may cause power surges or EMI (electromagnetic interference). Try using the original brand charger or a certified replacement.
5. Update BIOS and Drivers
Visit your laptop manufacturer’s site and update the BIOS and chipset drivers. Many power management issues are fixed via firmware updates.
Still Not Fixed?
As a last resort, test the same charger and mouse combo on a different laptop. If the issue persists, you may need to replace the USB mouse or further inspect your laptop’s USB controller.
Pro Tip
This issue is often overlooked but can be an early sign of degrading USB ports or internal grounding issues. Fix it early before it causes more problems.