https://www.displayfusion.com/Discussions/RSS/?TopicID=019e46b7-1e67-71f0-8723-3f4c60ee0b35 DisplayFusion RSS: Alt+Tab doesn't work and instantly closes when in a Fullscreen Borderless game Tue, 07 Jul 2026 13:47:47 GMT en hourly 1 https://www.displayfusion.com/Discussions/RSS/?TopicID=019e46b7-1e67-71f0-8723-3f4c60ee0b35 https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#8 Tue, 30 Jun 2026 18:00:05 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#8 DisplayFusion Yep it looks like you have it set correctly, I'll pass it over to our developers to have another look at and keep you posted.

Thanks! ]]> https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#7 Thu, 25 Jun 2026 10:19:06 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#7 DisplayFusion Initial log at 14:53:46
Second log at 17:59:23

Not sure if these would have anything changed, I've had the LogDebugLevelHooks set to 1 for that entire duration, and have rebooted before starting each log.
Are the advanced settings supposed to be configured like in my image?

]]> https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#6 Thu, 18 Jun 2026 19:06:21 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#6 DisplayFusion It doesn't look like that log has any lines from the advanced setting, could you reboot and grab a fresh log? ]]> https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#5 Sat, 30 May 2026 10:45:10 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#5 DisplayFusion Alt tabbing at about 18:32:05

HKCU\Software\Binary Fortress Software\DisplayFusion\LogDebugLevelHooks REG_SZ is set to 1 and I did restart my computer. This time I could not recreate it immediately in League of Legends so I used Escape From Tarkov ]]> https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#4 Thu, 28 May 2026 20:41:18 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#4 DisplayFusion Could you set the "Log Level for Hooks" advanced setting to "1", and then reboot and grab a new log? ]]> https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#3 Sat, 23 May 2026 09:47:53 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#3 DisplayFusion I start to alt tab at about 17:13:20 and it goes almost until the end of the log
I will note that previously it was working fine and I had to restart in order to recreate the bug again ]]> https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#2 Fri, 22 May 2026 15:23:27 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35#2 DisplayFusion I tested this with League of Legends here but I can't reproduce it. Could you send me a debug log? Here are the steps:

• On the DisplayFusion Settings > Troubleshooting tab, change the Logging drop-down to "L1: Log Minimal" and then click "Clear Log"
• Reproduce the issue and note the time so we'll know where to check in the log file
• Click the "Export Info to File" button on the Settings > Troubleshooting tab
• Reply with the file attached
• Disable debug logging after sending the log

]]> https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35 Wed, 20 May 2026 18:47:47 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/alttab-doesnt-work-and-instantly-closes-when-in-a-fullscreen-borderless-game/?ID=019e46b7-1e67-71f0-8723-3f4c60ee0b35 DisplayFusion When utilising Alt+Tab and in a fullscreen borderless game like Escape from Tarkov and League of Legends, pressing alt+tab will instantly close the dialogue. This does not occur in Overwatch.
When holding Alt down, it will continously flicker. Sometimes when spam clicking to alt tab it will randomly get fixed. I have attached a video of what happens when holding down alt using Current Monitor + Current Windows.

So far, the only configuration in which this does not occur is Show on All Monitors, Show Current Windows Only in which it will close the first time, but will work on the second attempt and beyond but this behaviour resets when you tab out. In this mode however, you cannot change the selected window with Tab.

Sometimes, I have been able to fix this by spamming the alt+tab or by changing to fullscreen and back but it is not replicable nor does it happen often.

This behaviour happens on 12.0.2 and 12.1 Beta v3 ]]>