Hi all. Been dealing with this one for a while. Please see this threadfor an aggregation of information on it.
I’ve had these issues on multiple machines, on integrated graphics and an Nvidia GTX Titan Xp via eGPU… before and after rebuilding and clean installing Windows 10, and for me they only started after the Windows 10 May 2004 Update (2020).
Strangely, my issues disappear after disabling “auto-hide the taskbar” in Windows settings. Many others report tricks around resizing the windows, that OBS or Gyazo GIF screen capture overlays temporarily pause the issue from occurring… and there are reports around the way Desktop Window Manager works, including this early report from 2016 around how the composite windows are handled. This is when most of the D3DRHI device lost/hung/removed errors started appearing (in 2016), alongside graphics cards timeouts which suggested modifying TDRDelay or updating/rolling back graphics card drivers or downclocking graphics cards as a fix. I have tried everything. Disabling auto-hide the taskbar is the only thing that has helped for the time being.
I am now convinced that this issue is related to Microsoft Windows’ Desktop Window Manager, and how Unreal Engine implements it. We need to combine forces into one giant bug report for Epic, and one giant Microsoft Feedback Hub issue to get some support from Epic and Microsoft to fix these issues which have been around embarrassingly for 4 years.
Recently, with the GTX Titan Xp eGPU, I’ve found that when alt+tabbed out of Assassin’s Creed Odyssey, it’s interacting with Blender and disabling some functionality which relies on window overlays. The mouse cursor still activates the menu tiles in the game (I can hear the sounds)… even when it is switched out of context (while I’m in Blender or other apps). I have also had issues with my integrated graphics crashing (with a timeout or crash of Intel graphics drivers, leading to application hang) while using Blender.
The problem here is Desktop Window Manager, and with how that’s being implemented. I will confidently assert that the graphics cards, graphics drivers are the symptom and not the cause. How can we get Epic and Microsoft to look at this? Stopgap solutions in the time-being have rendered things usable again… but it’s extremely frustrating after months (and perhaps years for some).
Also another recent report.