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badp
Asked: 2016-02-26 07:41:17 +0800 CST

How can I enable the lockscreen on a livecd ubuntu test session?

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I am running Ubuntu from a live session in order to see if I can reproduce this bug. Since though I'm still supposed to get stuff done, I'm trying to also do that. As a result I have to log onto corporate resources, and lock my screen while I'm not at my desktop.

I set a password on the default ubuntu/999 user account, but Ctrl-Alt-L still does not lock the screen, it merely blacks out the monitor.

How can I have a proper screen lock? Maybe I should just install xscreensaver...

live-usb

2 Answers

  1. On Ubuntu 12.04 & above with Unity/GNOME, you can enable locking the screen with the following command:

    gsettings set org.gnome.desktop.lockdown disable-lock-screen false

    However without a password it may not even work or be able to login i would recommend adding a user as well first just in case.

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  2. Probably not optimal, but it worked.

    1. Set up a password from the terminal (the graphical interface didn't work for me, but ymmv).

      passwd

    2. Open Software & Updates and enable all repositories.

    3. Install xscreensaver.

      sudo apt-get update
sudo apt-get install xscreensaver

    4. Launch the xscreensaver demon. This also opens up a window.

      xscreensaver

    5. Click on Settings and tick Lock Screen After. Set your timeout.

    6. Open System Settings → Keyboard → Shortcuts, and add this shortcut:

      xscreensaver-command -lock

      Assign to it the key combination of your choice; it's fine to override ctrl-alt-l.

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