this post was submitted on 04 May 2024
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I bought a new external monitor recently and have had the issue of an intermittent display signal

Disabling the monitor in device manager fixes the issue and the monitor works fine when disabled so it's highly likely its some weird software issue but I'd like to find a proper fix for it

I am able to get it to have constant display signal by chance sometimes without disabling the display in device manager but turning off the external display brings back the issue when I turn it back on and it reconnects

OS: Windows 11

Display: Lenovo G27QC-30 with Lenovo's drivers installed *have tried with Microsoft drivers and run into the same issue

Have already tried uninstalling and reinstalling monitor on device manager and reinstalling drivers and that hasn't fixed the issue

Also have already tried using display driver uninstaller to clean install graphics drivers

Edit:

the events tab in windows device manager for the monitor properties does show this error sometimes:

Device not started (monitor)

Device DISPLAY\LEN66F4\5&3287afbc&1&UID4352 had a problem starting.

Driver Name: oem64.inf Class Guid: {4d36e96e-e325-11ce-bfc1-08002be10318} Service: monitor Lower Filters: Upper Filters: Problem: 0x0 Problem Status: 0xC00000E5

Edit 2:

The monitor will work fine once if i restart my laptop but disabling and re=enabling in device manager causes the problem

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[–] [email protected] 3 points 8 months ago (11 children)

You haven't mentioned any cables, resolutions or GPU. The monitor is 2560x1440 at 165Hz. Are you running it at that? Is it straight from the GPU, or does it go through a dock? Are you on a desktop, tablet, laptop?

Does it work at 1080p60? 720p60?

Might be a crappy DP cable, and disabling the device in device manager is actually disabling extra features or AMD FreeSync or whatever, so its going back to being a dumb display

[–] x4740N 1 points 8 months ago* (last edited 8 months ago) (8 children)

The issue seems to have gone away for now after checking resolutions right up to the native 2560 x 1440 resolution

Not sure if it's just temporarily fixed or not

Edit: nevermind it's back

[–] [email protected] 1 points 8 months ago* (last edited 8 months ago) (7 children)

Ok, HDMI from laptop to monitor, running 2560x1440.
Rulled out freesync.
What refresh rate? Is it stable at 60hz?

[–] x4740N 1 points 8 months ago

No it is not stable at 60hz

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