tl;dr Install the libXtest package, which on Debian is libxtst-dev. Wasn’t it obvious that test is spelled with no e? Not to me atleast.

This is done on a Debian Jessie (aka Testing) machine.

Following will assume you have managed to get KeePassX compile happy. But then when you go in to settings you can’t find where to define the global Auto-Typ key.

You might have noticed that during the cmake run libXtest was listed as a optional dependency. If you didn’t happen to have it installed KeePassX will compile with Auto-Type functionality disabled. To be able to compile with Auto-Type support install libxtst-dev like so;

sudo apt-get install libxtst-dev

Then you just run cmake and make again to compile with Auto-Type enabled.