How can I map the keyboard shortcut to locking a session in KDE 4?

  • 3
    did you notice it defaults to ctrl+alt+l ? Jan 18, 2010 at 14:08
  • @CapiEtheriel -- Some of us work on more than one OS and would like to unify the keyboard shortcuts so we can be more productive.
    – Josh M.
    Mar 20, 2019 at 13:58

8 Answers 8


Here's what you could do to remap session locking from default Ctrl+Alt+L (tested with KDE4.3) :

  1. Go to "System Settings" (KDE menu).
  2. Choose "Keyboard & mouse" (on "General" tab).
  3. Choose "Global Keyboard Shortcuts" on the left.
  4. Choose "Run Command Interface" from "KDE component" dropdown list.
  5. Choose "Lock session".
  6. Select "Custom".
  7. Click on "None" (button changes to "Input...").
  8. Compose your desired sequence by pressing appropriate buttons on your keyboard.
  9. Click "Apply".
  • 2
    Keep in mind that this implies that SUPER is registered as a modifier key and not a key of it's own.
    – MiffTheFox
    Nov 17, 2009 at 16:29
  • 8
    As of KDE 4.10.2 (Kubuntu 13.04): System Settings -> Shortcuts and Gestures -> Global Keyboard Shortcuts -> The KDE Session Manager -> Lock Session.
    – preds
    May 3, 2013 at 0:25
  • You can also get to the Global Keyboard Shortcuts window by opening up the application launcher (kickoff) and typing "global keyboard shortcuts" into the search box.
    – rmiesen
    Jun 20, 2013 at 19:08

In Kubuntu 14.04 it's

  • System Settings (from the Kickoff "Start" menu)
  • Shortcuts and Gestures
  • Global Keyboard Shortcuts
  • KDE Component: The KDE Session Manager (at the bottom of the list, scroll down)
  • Lock Session

Kubuntu 18.10:

  1. System settings
  2. Search for "shortcuts"
  3. Global shortcuts
  4. ksmserver
  5. Lock session

I imagine that man xmodmap will help with the keybinding part of it.

I don't know enough of KDE to help with what keysequence already locks the screen.


default Ctrl+Alt+l did not work for me, maybe overshadowed by some other app - I had to explicitly set the shortcut as mentioned in the selected answer.

Also beware not to select "kscreenlocker", but the KDE session manager. Win/Meta+L worked fine here.

  • Users coming from Windows expect Winkey+L to work.
    – Rich
    Sep 19, 2018 at 19:25
  1. System Settings
  2. Shortcuts and Gestures
  3. Global Keyboard Shortcuts
  4. KDE Component: ksmserver
  5. Lock Session
  1. Go to "System Settings" (KDE menu).
  2. Workspace>Workspace Behavior>Screen Locking>Activation>Keyboard shortcut or search "lock"

In Debian 10 KDE Plasma it's:

  • System Settings (from menu)
  • Shortcuts
  • Global Keyboard Shortcuts
  • ksmserver
  • Lock Session

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