Comment 3 for bug 1851807

After upgrading from Ubuntu 19.04 into 19.10 the other day I have noticed the same thing (among with csgo in full screen no longer works (alt+tab once is ok, alt+tab twice and the fullscreen rendering ends up in the bottom of the screen) and sometimes trying to close the terminal window (and perhaps other windows too) will hang the gui - the later might be related to this issue).

That is the system log is being spammed with these messages (noone at Canonical or the maintainers who looks into "journalctl -b" to clean broken things up every now and then?).

1) Gooling on this topic it seems like xdg-desktop-portal-gtk might have this fixed in 1.5.0.something, question then is if this will be backported into the version used by Ubuntu 19.10 unless 19.10 would take the leap and upgrade the minor version into fixed one?

2) Possible manual workaround in the meantime might be to use something like dconf-editor and enable "introspect" which is a setting placed within /org/gnome/shell (scrolldown and you should see it).

However little through Google can be found what this setting really does and if its bad or not (I guess there is a reason for why it was disabled to begin with?).