New answers tagged input
At least on Debian-based systems such as Ubuntu there is a utility called xtrlock (1) available through the package repositories. This utility locks the keyboard and mouse until the password is entered while leaving windows visible. I find it useful for computers running information displays and the like.
First use xinput list to get the device ID for your mouse, and then use xinput --set-prop [ID#] "Device Enabled" "0" and xinput --set-prop [ID#] "Device Enabled" "1" to disable and enable the mouse. Source
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