Description of problem: I've had this problem since upgrading to F23 from F22. It happens on average every 3rd time I start one of the two Java applications I'm using: IntelliJ Idea or DbVisualizer. I've tried starting these applications using both OpenJDK and Oracle's JDK, both in version 7 and 8, but the problem persists. Quitting the application will make Alt+tab application switching work again. In DbVisualizer actually opening the Help-->About.. windows actually makes Alt+tab work again. Closing the About window make the problem reappear. Version-Release number of selected component (if applicable): How reproducible: Easy. Steps to Reproduce: 1. Start IntelliJ or DbVisualizer and check if Alt+tab still works 2. Quit the application 3. Repeat from step 1 until the problem occurs Actual results: Expected results: Additional info: This never happened prior to F23. Never seen this happening using any other application than these 2 java applications. It's possible that other java applications will trigger the same behaviour, but this I down't know.
I'm not using Wayland.
It's the same when starting the java application yEd graph Editor. Seems to be a general problem in Gnome shell when starting java applications.
Seems to be fixed in F24.