DisplayFusion RSS: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Tue, 15 Sep 2026 16:53:21 GMT

Ok thanks, we'll do some more testing here on this to try and reproduce it.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Mon, 14 Sep 2026 20:14:55 GMT

Sorry you're 100% correct, it's been a long time since reading the start of the thread and I forgot what the original post was.

I'm running a 5700x3D, but used to run a 5600X which had the same issue.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Mon, 14 Sep 2026 19:49:31 GMT

Sorry, my bad on that. The original question for this topic was about issues when setting the mouse above 1000 Hz and I was taking over this thread so missed the extra details there. I will re-open this and we'll re-test again. So far we haven't been able to reproduce any framerate issues in Slay the Spire 2 with DisplayFusion running unless the mouse is set to 8000 Hz.

Can you tell me what CPU is in your machine?

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Mon, 14 Sep 2026 15:26:14 GMT

I am not using a high polling rate, I'm using the standard rate of 1000Hz. Additionally the issue completely vanishes if I close Display Fusion. If I change my mouse to use 4000Hz and close Display Fusion, I have no issues with lag.

Additionally, the article you linked says explicitly

"Mice that poll at 1 kHz are not considered high polling rate here, as they generally did not exhibit performance issues except on CPUs with very slow single-core performance."

While it is true that higher polling rates neccesitate higher CPU usage, I still believe this is some sort of performance bug on Display Fusion's side.

I understand this isn't exactly a simple thing to pin down but I hope it's not being written off as not existing.

Appreciate the help either way.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Mon, 14 Sep 2026 15:16:13 GMT

We've done some more extensive testing here, and have found that we can induce framerate issues with high polling mice, even without DisplayFusion running. The short of it is that high polling mice cause Windows to have to handle a ton of mouse move events, and when anything contests for CPU, you start to run into performance issues. So it's not really caused by DisplayFusion, just that running DisplayFusion and a high polling mouse along with a game will end up with a lot of CPU contention.

The good news is that it sounds like at least for Godot engine games (e.g. Slay the Spire 2), they have fixed this issue recently in the Godot engine. See this blog post regarding that: https://godotengine.org/article/fixing-high-polling-rate-mice-on-windows/. The game would have to update to the latest Godot engine as well to get that fix.

Hopefully other game engines will follow-suit on that soon as well.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Thu, 16 Jul 2026 17:50:25 GMT

I agree. Thank you for looking into it!

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Wed, 15 Jul 2026 22:26:09 GMT

I understand the struggle, I'll be sure to post here if anything changes.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Wed, 15 Jul 2026 17:04:40 GMT

Okay thanks for confirming. Without being able to reproduce it here we're just taking shots in the dark unfortunately. We'll add this to our list and see if we have any other ideas though.

Thanks!

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Wed, 08 Jul 2026 21:33:39 GMT

Unfortunately the problem still exists.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Wed, 08 Jul 2026 20:01:33 GMT

After a new update to Division 2, the problem came back. I fixed it by adding "Disable DisplayFusion Taskbars while this application is running" in the compatability menu.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Wed, 08 Jul 2026 18:34:06 GMT

We've released a new beta, can you try it out and let me know if the issue persists?

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Wed, 10 Jun 2026 14:42:22 GMT

Okay this is likely related to the taskbar polling then, it's really odd that we can't reproduce it here though. I'll pass this to our developers and keep you posted when we have anything further.

Thanks!

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Wed, 03 Jun 2026 21:38:53 GMT

I've experienced this as well but haven't narrowed it down to DisplayFusion specifically. Is a fix in the works?

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Wed, 03 Jun 2026 19:05:02 GMT

No unfortunately it's the same, getting rid of the taskbars entirely or closing displayfusion seems to be the only fixes so far.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Wed, 03 Jun 2026 17:04:06 GMT

Interesting, if you disable tray icons (right click an empty spot on the taskbar and head to Multi-Monitor Taskbar > System Tray Icons > Disabled) on all your DisplayFusion taskbars, does that fix it up?

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Tue, 02 Jun 2026 04:40:45 GMT

Yes the problem appears to be fixed with the taskbars disabled even with displayfusion open.

It reappears immediately after enabling the taskbars again.

This issue does not appear limited to Slay the Spire 2, after disabling the taskbars I've noticed notably more consistent performance in every game I have installed, especially when moving around a cursor which in some games is very very typical like path of exile.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Fri, 29 May 2026 14:15:38 GMT

Weird, what if you disable your taskbars entirely?

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Tue, 26 May 2026 19:07:31 GMT

I've disabled all 3 hooks in the advanced settings and the problem still occurs.

If I exit display fusion completely the issue goes away.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Tue, 26 May 2026 18:02:24 GMT

We tested it here but can't seem to reproduce it. If you disable all 3 hooks globally in the Advanced Settings, does that fix it up?

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Mon, 11 May 2026 17:10:31 GMT

We'll do some testing here and keep you posted on what we find.

Thanks!

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Fri, 01 May 2026 05:49:40 GMT

I can confirm it persists.

When I'm not moving my cursor around I easily reach my capped FPS but as soon as I move the cursor it beings to stutter and goes down to half with lots of fluctuation.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Thu, 30 Apr 2026 20:30:58 GMT

Can you try out our latest beta and let me know if the issue persists?

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Wed, 29 Apr 2026 19:41:04 GMT

Here you go, hopefully you guys can figure it out!

The game I've been having the issue with as of late is Slay the Spire 2 but it definitely happens in many games I play to the point that sometimes I just close display fusion while playing stuff.

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Wed, 29 Apr 2026 17:52:12 GMT

Could you send me a copy of your troubleshooting info? Here are the steps:

Open the DisplayFusion Settings > Troubleshooting tab
Click the "Export Info to File" button
Reply with the file attached

RE: Display Fusion causing major lag in games when moving mouse.

Binary Fortress Software — Mon, 27 Apr 2026 04:37:22 GMT

I've disabled hooks for every single game on my desktop with

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C:\Program Files (x86)\Steam\*

and display fusion still seems to cause horrible lag in many of them.

DisplayFusion RSS: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

RE: Display Fusion causing major lag in games when moving mouse.

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