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How can I tell if the Pause key is working in Ubuntu?

The tilde (~) key is not working without holding the Right Alt key. Maybe something similar works for the Pause key.

It seems to work in System SettingsKeyboardShortcuts, but when I'm playing a game which needs this specific key, it does nothing.

How should I proceed?

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The tild (~) key is also working in System Settings -> Keyboard -> Shortcuts without holding right-alt key. – empec Dec 14 '12 at 14:11
@snoop: You know the drill by now... ;-) – Fabby Oct 2 '15 at 20:34
up vote 21 down vote accepted

You can test that any key is working with the xev command.

Press Ctrl + Alt + T to open a terminal window, then type xev. Another popup window opens but you can ignore that (it displays mouse activity). Watch the terminal output while pressing the Pause/Break key and see if there is any output. Here's mine:

xev output in terminal

Note that the window created by xev will need to be the window in focus, otherwise, the utility won't capture the key press.

For how to use this data, or to remap the key, see this similar question.

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@Flimm thanks for the edit. I didn't know about the focus. – Tom Brossman Dec 14 '12 at 15:19

I've written an in-browser test, so you can test this without having to open the terminal.

Simply press the Pause/Break key and see if it's working.

Pause/Break key test

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