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Graphics Cards

NVIDIA driver resets when two monitors use different refresh rates

troublesync_editorial
1mo ago
Performance
Environment

Environment

RTX 4070, Windows 11, one 165 Hz DisplayPort monitor and one 60 Hz HDMI monitor.

What happens

What happens

The screens flash black and Event Viewer logs nvlddmkm resets when video starts.

What I have tried

What I have tried

Clean-installed two driver versions and disabled browser hardware acceleration.

I would appreciate advice on how to identify the root cause without risking existing data or configuration.

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1 reply
0
ellielectron Answer
user
Posted 2w ago • 0 confirmations

The symptoms fit this explanation quite well.

Likely cause: Multi-plane overlay timing becomes unstable across displays with mismatched refresh rates.

What I would try: Test matched refresh rates, disable MPO through the documented registry setting and update both GPU driver and monitor firmware.

Take a backup or note the current setting first so you can roll back easily.

emmahacks
user
Posted 2w ago

Thanks, this gives me a concrete test. I will try it with the current configuration backed up first.

Showing 1 of 1 community responses
AI DIAGNOSTICS

Incident analysis

Updated 1mo ago• Trouble ID

Most likely causes

Multi-plane overlay timing becomes unstable across displays with mismatched refresh rates. 84%
A recent software, firmware or configuration change is exposing an existing compatibility issue. 40%

Summary

The reported behaviour is consistent with multi-plane overlay timing becomes unstable across displays with mismatched refresh rates. The safest next step is to verify that hypothesis with a reversible test before making permanent configuration changes.

Suggested Fixes

Verify the likely cause
Test matched refresh rates, disable MPO through the documented registry setting and update both GPU driver and monitor firmware.
Validate and monitor
Reproduce the issue once after the change, review relevant logs or metrics, and keep a rollback path until the system has remained stable.

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