escape key bindings with or without modifiers do not work

[Gerry]

All the bugs that are related to older versions of compiz are being closed.
Since the bug still exists and it was closed due to it being old, then I need to re-create it.

If it isn't going to be fixed for some philosophical reason, I'd like to see it posted here and that's fine.

The bug is that no binding in compiz that includes the Escape key will work. Evidently that is by design at some level, but Alt-Ctrl-Esc is a handy binding to have.

Simply put, if you try to bind any function to the Escape key by itself or with Shift/Alt/Super/Ctrl, the 'Grab' button will allow you to assign it, but the assignment will not work and there is no error reported.
Not in the interface, nor in a logfile (that I can see yet).

cf. older reports and comments:
   https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/176195
   https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/158855
   http://forums.linuxmint.com/viewtopic.php?f=47&t=24397
   http://ubuntu.5.x6.nabble.com/No-Ctrl-Alt-Esc-with-Compiz-td892450.html

Ubuntu 15.04 Vivid
Compiz Version: 1:0.9.12.1+15.04.20150410.1-0ubuntu1

[Gerry (gsker)]

To make a suggestion, if binding the Escape key is not going to produce any result, then the interface should be configured to disallow it and a log message should be produced for any time it is set and/or used.

So if I Click 'Grab' and Press <ctrl>Escape, then the binding should not be set and a error box should popup.

This would make me sad, but not as sad as setting a binding and having the setting accepted but have nothing happen when I try to use it.

[Lysenko Denis (pharmasolin)]

Confirmed in 15.10, if escape binded to close window for example, it didn't works.
http://i.imgur.com/mZz8Yue.png

[Naman Dixit (ndixit26)]

Confirmed in 16.04, can not bind xkill to Ctrl+Esc, Alt+Esc or Ctrl+Alt+Esc

[Gerry (gsker)]

After re-reading my bug description, it could also be interpreted as a bug in compizconfig-settings-manager so I added it as an "also affects".

compizconfig-settings-manager 1:0.9.12.2+16.04.20160823-0ubuntu1

I just wish I knew what layer was preventing it from being a vlid binding.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.