Microsoft says that external displays might go black if Windows 10, version 2004 users try to draw in apps including but not limited to Microsoft Office Word and Whiteboard.
After the affected external monitors go black, customers will see that their graphics controllers are being marked as having issues in Device Manager.
"If you have a device running Windows 10 version 2004 with a built-in screen (such as a laptop or tablet) and a connected external display set to Duplicate your primary screen, you might see both monitors flicker and the external monitor go black if you try to draw using an Office app (such as Word)," Microsoft explains in a support document published over the weekend.
"This can also happen with some other apps capable of drawing, such as Whiteboard. If you check in Device Manager, your graphics controller will have a warning icon next to it (a yellow triangle with an exclamation mark in it)."
Workaround availableWhile Microsoft has publicly acknowledged this as a Windows 10, version 2004 known issue, the company has not yet added it to the Windows 10 Health Dashboard for easier tracking.
However, Redmond does say that they are working on a fix for this issue to be released in a future Windows 10 2004 version.
Users with connected external display set to Duplicate their laptop's or tablet's screen can work around the issue by restarting their device.
Once the devices reboot, the external device should recover. Of course, customers are also recommended to wait using the drawing feature in the problematic apps until an update is published to fix the issue.
Other Windows 10 2004 known issuesRight after releasing the Windows 10 May 2020 Update, Microsoft added ten known issues to the Windows 10 Health Dashboard, nine of them being behind compatibility holds that customers of affected devices from upgrading to the latest Windows 10 release.
Microsoft and the vendors of drivers and firmware coming with incompatibility issues are collaborating on developing resolutions, with updates to be provided with upcoming releases.
The company provides mitigation measures or workarounds for some of the issues, saying that "you will need to check with your device manufacturer (OEM) to see if an updated driver is available and install it."
Two days later, Microsoft also acknowledged and mitigated another Windows 10 known issue affecting the Deployment Image Servicing and Management (DISM) tool that helps service Windows images prior to deployment.
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