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When starting Luna M7 up in Fedora 20 - which runs gtk3-3.10.8-1.fc20.x86_64 and gnome-shell-3.10.4-2.fc20.x86_64 - I cannot use Alt+Tab while Eclipse is being launched: While the workspace chooser and the splash are active there's no reaction to pressing Alt+Tab in Gnome Shell. The application switcher is not showing up. Once Eclipse is up and running, the workbench window is opened, Alt+Tab is usable again. Using an alternative application switcher (Alternatetab) solves it for me.
It should be using gtk2. Can you try starting eclipse with SWT_GTK3=1 to test with GTK3?
Thanks for coming back so quickly! Yes afaik it's using GTK2. I must be doing something wrong: when I add -DSWT_GTK3=1 to eclipse.ini Eclipse wont get up, it's stuck in the splash and wont make it to the workspace chooser. How can I set it to use GTK3 when using eclipse.ini? When launching Eclipse via the terminal I notice that the "bug" wont happen, Alt+Tab switches to any other window/application that's available. It only happens when launching via dock.
Max reminded me that SWT_GTK3 needs to be exported. Since the "bug" wont happen if I launch Eclipse via a term I ended up having the following in my launcher-file: Exec=gnome-terminal -x bash -c "export SWT_GTK3=1; cd /opt/eclipse-jee-luna/eclipse; /opt/eclipse-jee-luna/eclipse" Unfortunately this launches a terminal and the "bug" wont happen. Any pointer please?
So when moving the launch cmd to an external script: export SWT_GTK3=1 cd /opt/eclipse-jee-luna/ ./eclipse and having Exec=/opt/eclipse-jee-luna/run-eclipse.sh no terminal is launched and Alt+Tabs without flaws. I'm not sure though if I'm now using GTK3. Any way to verify that?
It very much looks like I'm running GTK3 when using the separate run-script (I hit nug #427480). Unfortunately there's no change, Alt+Tab is still not functional while splash and workspace chooser are active.
I cannot reproduce this issue on GTK3.22, 4.8 M6, and Fedora 27.
