DisplayFusion RSS: Stutter every ~5 seconds due to monitor event changes https://www.displayfusion.com/Discussions/RSS/?TopicID=0b8ffa1f-d473-4bbe-8940-8e2912d92900 DisplayFusion RSS: Stutter every ~5 seconds due to monitor event changes Wed, 20 May 2026 14:54:35 GMT en hourly 1 https://www.displayfusion.com/Discussions/RSS/?TopicID=0b8ffa1f-d473-4bbe-8940-8e2912d92900 RE: Stutter every ~5 seconds due to monitor event changes https://www.displayfusion.com/Discussions/View/stutter-every-5-seconds-due-to-monitor-event-changes/?ID=0b8ffa1f-d473-4bbe-8940-8e2912d92900#2 Thu, 10 Aug 2023 14:29:36 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/stutter-every-5-seconds-due-to-monitor-event-changes/?ID=0b8ffa1f-d473-4bbe-8940-8e2912d92900#2 DisplayFusion If you unplug the video cable for each monitor one at a time, does a specific one stop sending those log lines? ]]> Stutter every ~5 seconds due to monitor event changes https://www.displayfusion.com/Discussions/View/stutter-every-5-seconds-due-to-monitor-event-changes/?ID=0b8ffa1f-d473-4bbe-8940-8e2912d92900 Sun, 06 Aug 2023 23:53:40 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/stutter-every-5-seconds-due-to-monitor-event-changes/?ID=0b8ffa1f-d473-4bbe-8940-8e2912d92900 DisplayFusion

Code
Copy
Select All

2023/08/06 16:34:11.5876##_##INFO:L1##_##displayfusion.exe:5740##_##TaskbarManager:TaskbarRemoveAllTASKBARMANAGERTHREADONLY:2149##_##-##_##Removing All Taskbars: TaskbarManager:ProcessTaskbars:NotEnabled:TaskbarManager:TimerUpdateCallback##_##-
2023/08/06 16:34:11.6658##_##WARN:L1##_##displayfusion.exe:5740##_##FormMain.WndProc:WndProc:356##_##-##_##WM_DEVICECHANGE:DBT_DEVNODES_CHANGED detected.##_##-
2023/08/06 16:34:11.6658##_##WARN:L1##_##displayfusion.exe:5740##_##BFPublicData:ForceUpdateMonitorsUITHREADONLY:820##_##-##_##Reason: UpdateMonitorEnums:FormMain:WM_DEVICECHANGE:DBT_DEVNODES_CHANGED:12.336s##_##-
2023/08/06 16:34:11.6665##_##WARN:L1##_##displayfusion.exe:5740##_##BFMonitorEnumWin10:GetMonitorsRaw:119##_##-##_##[GetMonitorsUITHREADONLY:BFPublicData:BFPublicData:UpdateMonitorEnums:FormMain:WM_DEVICECHANGE:DBT_DEVNODES_CHANGED:12.336s:GetMonitors] Monitors have changed [NoPathCache], processing.##_##-
2023/08/06 16:34:12.5405##_##INFO:L1##_##displayfusion.exe:5740##_##BFMonitorEnum:UpdateMonitorsUITHREADONLY_NOLOCKS:223##_##-##_##[BFPublicData:UpdateMonitorEnums:FormMain:WM_DEVICECHANGE:DBT_DEVNODES_CHANGED:12.336s] Setting monitor caches.##_##-
2023/08/06 16:34:12.9275##_##WARN:L1##_##displayfusion.exe:5740##_##TaskbarManager:TaskbarRemoveAllTASKBARMANAGERTHREADONLY:2140##_##-##_##[TaskbarManager:ProcessTaskbars:NotEnabled:TaskbarManager:TimerUpdateCallback]: 1 monitor detected, waiting.##_##-


Running DisplayFusion 10.1 Beta 7 on Windows 11. Every 5 to 10 seconds, CPU spikes to 5% from DisplayFusion.exe and mouse becomes laggy for 1 second.

After disabling monitor update events the lag is gone. It should be noted that I have 4 monitors plugged in and my machine is set to "project to PC screen only" so only 1 monitor is active. Maybe the state of having 4 plugged in but only 1 active is triggering the updates. In any case it would be nice if maybe it detected that windows is sending so many errant monitor update events and did something to minimize the lag. ]]>