Hello All,

When Alt tabbing out of Counter-strike: Global Offensive in Fullscreen 1280x960 4:3 Stretched there is this odd mouse lag/stuttering that occurs for a few seconds. The desktop appears quickly after ALT+TAB but the mouse stutters along with what seems like a refreshing of the taskbar. This occurs after I conduct a Monitor profile change to modify the native resolution of 2560x1440 to 1280x960. The fix that I have found is by changing the Nvidia Control Panel settings. NVDA CP -> Display -> Adjust desktop size and position -> Scaling Mode. Under scaling mode I would select fullscreen to enable the stretched effect. Though the oddest part is the only thing I would have to do is to change the "Perform scaling on:" from either GPU to Display or Display to GPU to fix the problem. Regardless of what the two settings are to begin with, the swapping of this setting resolves the ALT+TAB mouse stuttering. So long as I change to the other and hit apply the problem goes away.

In my monitor profiles I have 3 monitors attached at all times. Though with the CSGO profile I've disabled the other 2. 2 of them are 1440p & the other is 2160p.

Attached is L1 debug log. I've reproduced it around 00:45.

Thanks in advance.

That appears to resolve the issue if I stop DisplayFusion from the Icon Tray.

I came across this thread https://www.displayfusion.com/Discussions/View/nvidia-scaling-mode-issues/?ID=68c2f254-9fb1-4843-8a6c-2a1512f45d22 and using 9.4.3 works fine for the time being. But once I upgrade back to 9.9 its no good.

Yes I did grab that log while 9.9 is running. That setting is not enabled. I even when to enable the DF Taskbar to disable it even though its greyed out to see if there was an effect and the problem still persists on 9.9.

Changing that setting didn't do the trick. And yes the Log from the first post was done with CSGO running.

https://youtu.be/oopgW2YMtDM
After I alt tab I am moving the Mouse in a circle continuously.

I've provided the settings for both versions I've been using.

I went to the 10 beta and the issue is resolved. Though I disabled the title bar, changed my theme to dark mode on DF, and messed with the Nvidia scaling resolution options. After 2 restarts its still going strong and the issue hasn't appear yet. Thanks for the help!

Well it came back so neither of those things worked.