If you’re a dual monitor user, you may have experienced frustrating issues like mouse stuttering or problems with your DisplayPort connection. I recently discovered a solution that resolved these problems for my setup, and I believe it could help others facing similar challenges.
My Setup
To provide a bit of context, here’s a brief overview of my dual monitor configuration:
- GPU: NVIDIA RTX 4080 Super
- Operating System: Windows 11
- Monitors:
- Main Monitor: Connected via DisplayPort
- Secondary Monitor: LG 27GQ50A UltraGear (tested with both HDMI and DisplayPort)
The Problems Encountered
While using my dual monitors, I ran into several issues that significantly disrupted my workflow.
- Mouse Micro-Stuttering: When I set Windows to “Show only on 1”, I noticed periodic stuttering on my primary screen. This inconsistency was not just annoying; it made it difficult to work efficiently.
- DisplayPort Connectivity Loop: While testing with the secondary monitor, I encountered a bizarre problem where the LG monitor would continuously connect and disconnect in a loop when using DisplayPort. This issue persisted regardless of the input source used.
- HDMI Issues: When the secondary monitor was disconnected, Windows seemed to still recognize the desktop as extended, leading to strange behavior and a clunky user experience.
The Solution
After a fair amount of troubleshooting, I stumbled upon a surprisingly simple fix that dramatically improved my experience. I disabled the “Auto Input Switch” feature in the on-screen display (OSD) menu of my monitor.
Here’s how it worked:
- Disabling Auto Input Switch: After turning off this feature, I noticed that the previously irritating mouse stutter on my primary monitor disappeared completely. The DisplayPort loop was resolved, and the standby/power-off behavior of the secondary monitor became seamless.
What’s particularly fascinating is that this fix may not be exclusive to my LG 27GQ50A. It could potentially solve similar problems on other monitors or TVs that have an “Auto Input Switch” or “Input Auto Detect” feature, whether they’re connected via HDMI or DisplayPort.
Key Takeaways
One critical insight I gained from this ordeal is that the problem is often not due to software issues such as drivers or Windows settings. Instead, the root cause usually lies in the monitor or TV firmware and settings. Keeping your monitor’s firmware updated, turning off any automatic input detection, and manually selecting your input can effectively eliminate these annoying glitches.
For those who still value the convenience of having dual monitors, I recommend using the Windows shortcut Win + P. This simple command allows you to quickly extend or duplicate your desktop as needed, providing the flexibility that dual monitors are meant to offer.
In conclusion, if you’re experiencing mouse stutter or DisplayPort loops in your dual monitor setup, consider checking the input settings on your displays. Disabling Auto Input Switch may be the key to unlocking a smoother and more reliable dual monitor experience. Hopefully, sharing this solution will save someone from the frustration of dealing with similar technical issues.
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