I just experienced the issue again. I have attached the same Xorg Log after applying the workaround mentioned in the original post.
** Attachment added: "Post Issue Xorg Log File" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1175279/+attachment/3661731/+files/Xorg.0.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1175279 Title: Focus gets stuck on the current application To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1175279/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs