Comment 101 for bug 1181666

I first noticed this issue when I was running Ubuntu GNOME 15.04 with GNOME 3.16, but even now that I have upgraded to Ubuntu GNOME 15.10 with GNOME 3.18 I still experience the issue (though I have not yet experienced this on Ubuntu GNOME 16.04 with GNOME 3.19 - but that may be due to the fact that this issue only comes up every so often (a few times a week at the moment) and I haven't used it that much). The issue being that for some reason suddenly for seemingly no reason unless I interact with the top bar in terms of clicking on an option on it (e.g.: the calender or Activities Overview buttons), I am unable to click on any application, or even drag some files on the desktop, though if I go to the bottom of my screen Docky does should which is on autohide so it does allow some interaction, though interestingly not all as buttons don't change colour that normally would when I go over them when my machine is doing this funny thing.

Some have even said though that they have to completely restart gnome-shell to temporarily get rid of the problem. I also experienced the problem a lot on 3.16, but in 3.18, it is periodic in the week that I experience it and it is several times, but not as much, and not as blocking.

I initially reported this issue here, but thought I should also do so upstream: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1482397