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I have re installed ubuntu-desktop. After that Ctrl+Alt+L and Ctrl+Alt+Del shortcuts are not working.

If I click on the button on the top right side of the desktop (where things like logout, switch user and shutdown appear) I can see that lock screen has Alt+L next to it, but its colored grey. If I am clicking from there screen lock and logout are working. But the shortcuts are not working.

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  • Are you using Unity? What is the output of gsettings get org.gnome.settings-daemon.plugins.media-keys screensaver?
    – Seth
    Apr 16, 2015 at 18:19
  • I am getting the following output: '<Primary><Alt>l' Apr 20, 2015 at 9:27

2 Answers 2

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As a workaround you could create a shortcut (System Settings -> Keyboard -> Shortcuts tab) and assign it to command gnome-screensaver-command -l

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  • 2
    I tried creating custom shortcut as mentioned above. Even then it is not working. Apr 20, 2015 at 9:32
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On Ubuntu 16.04:

System settings > Keyboard > Shortcuts tab > System Change Lock Screen from Ctrl+Alt+L to whatever you want (for example Super+L).

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