I have just installed Matlab R2019a on my Ubuntu 16.04LTS. When I run it from a terminal, I get the following GTK message:
Gtk-Message: 18:16:10.235: Failed to load module "overlay-scrollbar"
Gtk-Message: 18:16:10.236: Failed to load module "unity-gtk-module"
Gtk-Message: 18:16:10.247: Failed to load module "canberra-gtk-module"
but, the modules are already installed. How can I fix it, even though Matlab runs normally? Thanks.
Re the overlay scrollbar message, you have 3 options:
Ignore it, as it is harmless; you'll just get normal scrollbars.
Install overlay-scrollbar-gtk2 so you have the overlay scrollbar module for GTK2 applications.
Set the env variable GTK_OVERLAY_SCROLLING=0 to inhibit trying to load the module.