Comment 23 for bug 1854183
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35a32c5
(Get the code!)
Not sure if related. Came here because of the "infinite surface size not supported" warning.
I had the similar issues (cinnamon freezes but can move mouse) with a personal python3 (3.6) project using Gtk (3.26.1) in Ubuntu 18.04 (64bit) and there was the same warning. Project was not related to LibreOffice.
I found (my) problem: I had a Gtk.TextView in a Gtk.Box directly and not inside a Gtk.ScrolledWindow. There was no problem for small text, but in big texts the whole system freezes although I could move the mouse.
After I inserted the Gtk.TextView inside a Gtk.ScrolledWindow the problem solved.
Since the report is about a Gtk 3 environment probably there exists something similar. Example: a textview-like widget that tries to occupy more surface than it "can". Or the order in which the widgets "realize" themselves.
(The problem does not exists in my Calc (LO 6.0.7.3). But I also do not use Compiz So this is not a declaration that the problem does not really exist.