On Thu, 19 May 2016 12:22:23 -0400, Steve Litt wrote:
> On Wed, 18 May 2016 14:13:31 -1000
> Joel Roth <joelz@???> wrote:
<snip>
>> 2) Terminate X via Ctrl-Alt-Backspace
>>

>>    Seems like an easy, useful, historic way to kill a malfunctioning
>> X.

>
> Yeah, I remember fondly the days when this worked. Someone mentioned a
> magic sysreq substitute, but if you get the WRONG sysreq key sequence,
> you can reboot your whole computer. It's almost impossible to hit
> Ctrl+Alt+Backspace by accident, so I think it's a wonderful thing to
> have it do the right thing and blow me out of X.
<snip>

You might want to try this:

setxkbmap -option terminate:ctrl_alt_bksp

Regards
Urban