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I use a good deal of the default Ubuntu shortcuts as shortcuts in Emacs (Alt-Space being the most important). I obviously have disabled these shortcuts in the keyboard shortcuts dialog, but for whatever reason they sometimes "come back", generally after I've installed/uninstalled certain packages, or upgraded Ubuntu.

My question therefore is: how do I keep these shortcuts disabled? I don't want shortcuts like Alt-Space restored for any reason.

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No one? :( I did a software update (no new installed packages) and again Alt-Space as well Ctrl-Alt-Arrows have reappeared. So annoying. – Christopher Monsanto Feb 4 '13 at 9:16
Agreed! Maybe you can add something to your login script. – Jay Bazuzi Feb 7 '13 at 18:32
That is one of the reasons that I use fluxbox as my window manager. There, the keyboard shortcuts can be edited in a text file and moved around different machines. – rvf0068 Feb 7 '13 at 23:07

There are several ubuntu bugs in launchpad about keyboard shortcuts settings being reset to default.

It seems that when you switch the 'Backend' setting to 'Flat-file Configuration Backend' in CompizConfig Settings Manager under 'Preferences', the keyboard shortcuts changes seem persistent. You'll have to do a unity --replace for the changes to take affect.

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Thanks for pointing out this 'Backend' option. Can you please edit your answer to tell us where the 'flat files' are stored? – Lambart Oct 2 '13 at 21:19

Try gconf-editor then search for the keybinding under Edit -> Find search also in key values
You should be able to find your keybinding here, then unset it or change it to something else

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this does not answer the question – Lambart Oct 2 '13 at 21:24

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