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I have my RasPi connected to my TV and was wondering how I could lock and unlock the gui via SSH.

I disabled the autlogin on boot with purpose and I would like to be forced to connect an Keyboard for the Login.

When I tried google, I found the xset s off and xset s on commands but this seem to have no effect.

Also I installed xscreensaver but I am not sure how I can login in the beginning.

I am using the RP3 with Raspbian and Pixel.

Hope, some of you might help

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Are you trying to kick a user who has a GUI session open, using SSH? In that case

sudo pkill -f lxsession

should do the trick. It will forcibly close the current session and display a new GUI login dialog.

If you want to prevent anyone from logging back on, you could (for example) unload the keyboard driver and disable HDMI after you have killed lxsession.

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  • Thank you, that was what I am looking for. Do you also know how I start a new session logging another user in over ssh?
    – maltere
    Commented Jan 18, 2017 at 13:24
  • I guess that would be sudo -u username startlxde
    – Dmitry Grigoryev
    Commented Jan 18, 2017 at 13:45
  • yes that seems to do something but it throws an error Invalid MIT-MAGIC-COOKIE-1 key** Message: main.vala:99: Session is LXDE ** Message: main.vala:100: DE is LXDE Invalid MIT-MAGIC-COOKIE-1 key (lxsession:4454): Gtk-WARNING **: cannot open display: :0 I tried export DISPLAY=:0; sudo -u pi startlxde
    – maltere
    Commented Jan 18, 2017 at 14:46
  • @MalteReddig You should be able to generate a new key with xauth, however this really begs for a separate question: comments are intentionally short and lack many formatting features.
    – Dmitry Grigoryev
    Commented Jan 18, 2017 at 15:08

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