Comment 21 for bug 2004533

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Daniel van Vugt (vanvugt) wrote : Re: Gtk-WARNING ... drawing failure for widget ... invalid value (typically too big)

I think this is a consequence of your desktop being 18432 pixels wide. Each 4K monitor is 6144 logical pixels wide because of a custom Xrandr scaling factor of 1.6.

Turning off screens wouldn't fix it, only unplugging them might. But still this sounds like a GTK bug because modern Nvidia GPUs like yours should be fine with an 18K desktop.