I tried installing this light-locker and logging out and in: http://www.webupd8.org/2013/08/lightdm-session-locker-light-locker.html
Thereafter Ctrl-Alt-F7 will not bypass the greeter anymore, no mater whether you use "light-locker-command -l" or "dm-tool lock" or "dm-tool switch-to-greeter" to bring on the greeter (or whatever it is) which is strange, since "dm-tool switch-to-greeter" does not activate lock according to #17.
I tried installing this light-locker and logging out and in: www.webupd8. org/2013/ 08/lightdm- session- locker- light-locker. html locker- command -l" or "dm-tool lock" or "dm-tool switch-to-greeter" to bring on the greeter (or whatever it is) which is strange, since "dm-tool switch-to-greeter" does not activate lock according to #17.
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Thereafter Ctrl-Alt-F7 will not bypass the greeter anymore, no mater whether you use "light-