Desktop Windows Manager (dwm.exe) massive RAM/GPU usage on A380/Nvidia combo setup, newest drivers

[Snhnry]

Hi there, I'm experiencing issues similar to the recent Desktop Windows Memory memory leaks, but on the newest beta drivers (31.0.101.4499).  My hardware setup is somewhat non-standard so I wanted to create a new report on the off chance that it's an edge case that wasn't fixed back in the original driver fixes.  I'm on a desktop PC using an Arc A380 as a secondary GPU to drive multiple extended monitors. 

The full graphics bug report template is attached along with SSU and Graphics Command Center reports, and an Event Viewer crash report for dwm.exe.

Hardware Setup:

Intel Arc A380 used as secondary GPU

Nvidia 2080ti used as primary GPU

See attached files for full hardware info

Problem Description:

During normal Windows usage, dwm.exe memory usage steadily increases, up to about 25GB where it then crashes and reloads a new instance. There is also high GPU usage tied to dwm.exe when no video or 3d elements are present.

Notably, the behavior seems to be specifically tied to a certain browser window displaying the home automation software Home Assistant, which is a Python app (run on a separate server) that primarily uses the Lit Framework for page rendering. I have this page open at all times on a dedicated monitor connected to an Arc A380. The page is running using the Vivaldi browser (chromium based), running as a PWA. The page does not need to be active or interacted with in order for the problem to manifest.

Minimizing the offending page will stop the dwm.exe GPU usage, and closing the page entirely will clear out the dwm.exe RAM usage, often going from ~20GB to less that 1GB the moment the offending page is closed.

In this screenshot of Task Manager, you can see that dwm.exe is using GPU 1 (Arc A380) while Vivaldi is using GPU 0 (2080ti). The cause of the memory leak seems to be a Vivaldi PWA website, which is inconsistent with the reported GPU usage.

Additional files:

Manual memory dump of dwm.exe when it was approaching 27GB in size. (Google Drive link)

[Hugo_Intel]

Hello Snhnry

Thank you for posting on the Intel Communities. We are sorry you are experiencing a memory leak issue on your system with Intel® Arc™ A380 Graphics.

We noticed that you are using an Insider Preview version of Windows, this version can cause different types of errors and crashes, as such if you plan to continue using the Insider Preview program this issue should be reported to Microsoft since the goal of this program is to report bugs and this bug seems to be tied to the Operating System as well. In order for us to assist please do a clean installation of a stable Windows build the latest version is 22621 which corresponds to the 22H2 update and check if the same issue happens in that case let us know so we can further assist.

Best Regards,

Hugo O.

Intel Customer Support Technician.