DisplayFusion RSS: Alt+Tab sometimes doesn't work unless ending the HookApp process... https://www.displayfusion.com/Discussions/RSS/?TopicID=012fddc6-737a-4055-9116-7b35043a2368 DisplayFusion RSS: Alt+Tab sometimes doesn't work unless ending the HookApp process... Mon, 06 Apr 2026 10:49:49 GMT en hourly 1 https://www.displayfusion.com/Discussions/RSS/?TopicID=012fddc6-737a-4055-9116-7b35043a2368 RE: Alt+Tab sometimes doesn't work unless ending the HookApp process... https://www.displayfusion.com/Discussions/View/alttab-sometimes-doesnt-work-unless-ending-the-hookapp-process/?ID=012fddc6-737a-4055-9116-7b35043a2368#4 Tue, 18 Oct 2016 19:51:34 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/alttab-sometimes-doesnt-work-unless-ending-the-hookapp-process/?ID=012fddc6-737a-4055-9116-7b35043a2368#4 DisplayFusion Sounds good, thanks! ]]> RE: Alt+Tab sometimes doesn't work unless ending the HookApp process... https://www.displayfusion.com/Discussions/View/alttab-sometimes-doesnt-work-unless-ending-the-hookapp-process/?ID=012fddc6-737a-4055-9116-7b35043a2368#3 Mon, 17 Oct 2016 19:46:22 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/alttab-sometimes-doesnt-work-unless-ending-the-hookapp-process/?ID=012fddc6-737a-4055-9116-7b35043a2368#3 DisplayFusion I've had this issue happen to me only twice since your post. Having two monitors running, one with a game in borderless/windowed fullscreen mode, and Chrome on the same screen as well. After opening DisplayFusion from the notification icon and setting the logging level to 1, I was immediately able to Alt+Tab again like usual.

I'm gonna leave my log on L1 for the time being to try to get this bug caught... ]]> RE: Alt+Tab sometimes doesn't work unless ending the HookApp process... https://www.displayfusion.com/Discussions/View/alttab-sometimes-doesnt-work-unless-ending-the-hookapp-process/?ID=012fddc6-737a-4055-9116-7b35043a2368#2 Fri, 14 Oct 2016 18:35:38 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/alttab-sometimes-doesnt-work-unless-ending-the-hookapp-process/?ID=012fddc6-737a-4055-9116-7b35043a2368#2 DisplayFusion It definitely sounds like the hook processes are hanging up. Could you enable debug logging and then just send a copy of the logs the next time you notice this issue?
  • On the Troubleshooting tab, change the Logging drop-down to "L1: Log Minimal"
  • Restart DisplayFusion
  • Reproduce the issue and note the time so we'll know where to check in the log file
  • Send us the DisplayFusion.log and DebugInfo.html files (can be found by clicking the Open Log button on the Troubleshooting tab)
  • Disable debug logging after sending the log
]]> Alt+Tab sometimes doesn't work unless ending the HookApp process... https://www.displayfusion.com/Discussions/View/alttab-sometimes-doesnt-work-unless-ending-the-hookapp-process/?ID=012fddc6-737a-4055-9116-7b35043a2368 Fri, 14 Oct 2016 01:30:50 GMT Binary Fortress Software https://www.displayfusion.com/Discussions/View/alttab-sometimes-doesnt-work-unless-ending-the-hookapp-process/?ID=012fddc6-737a-4055-9116-7b35043a2368 DisplayFusion I've been using this software for a while now, and have made some posts about this issue with a particular game. I no longer believe it to be restricted to this game, as it's been happening without it running occasionally. It isn't something easy to reproduce, but all of a sudden I will press 'alt+tab' and the normal window shows up, and I can even tab through the different windows that are open. When I let go of both buttons however, the program doesn't switch over. I can click the program in the taskbar (on another monitor if whatever I'm running is in fullscreen), but it's a bit of a pain. Even restarting DF doesn't fix this issue.

What does fix the issue?
I went to task manager and ended 'DisplayFusion.exe', and started the program again. Same issue. Then I ended the 'DisplayFusionHookAppWIN6032.exe', nothing happened. Then, I ended 'DisplayFusionHookAppWIN6064.exe', and everything was back to normal. Those last two AppHook processes didn't close when I exited DisplayFusion the first time, but clearly something was bugged with the 64-bit process. Is there an advanced option that might assist with preventing this issue? I can start logging, however I don't know if I can reproduce it for a few days...maybe I'll wait until it happens and start logging. Any preferred level (1-3) of logging so you get just enough info, but not too much? ]]>