Source: mate-terminal Version: 1.16.2-1 Severity: important Tags: stretch sid upstream fixed-upstream Control: forwarded -1 https://github.com/mate-desktop/mate-terminal/issues/171
Quick double-clicking with right mouse button can freeze Xorg in a way that keyboard and mouse input will be blocked for the whole MATE session. To get things back to normal, you'll have to switch to system console via Ctrl-Alt-F1, log in and kill the mate-terminal process. See the linked upstream bug for more info and reports from the users. This isn't always reproducible on the first try, sometimes you'll need several tries in a row, but eventually it happens. This issue had been fixed upstream in version 1.16.3. Please upload it.
