I am using Ubuntu 16.04 and Unity 7.4.0 and have been messing around with the screensavers and lock screens. After trying out xscreensaver and a few others, I tried to go back to the default because I decided that that one looked better than all the others, but I couldn't find it. Most people say that gnome-screensaver is the default for Xenial. I don't think that's right because when my screen is locked with gnome-screensaver, it looks nothing like it did before. It shows an ugly white box with buttons that say Switch User and Unlock and asks for my password. How do I revert back to the default lock screen?
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Curtice Gough
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The default display manager is lightdm, which uses unity-greeter as the default lockscreen.
You'reAGitForNotUsingGit
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Umm I think the steps to set it up would improve your answer? – WinEunuuchs2Unix May 02 '17 at 12:14
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@WinEunuuchs2Unix technically...the exact question was answered :/. Perhaps try `sudo dpkg-reconfigure lightdm` – nullmeta May 02 '17 at 13:14
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@nullmeta I ran that command and uninstalled gnome-screensaver. It didn't work. Is there anything else I should try? – Curtice Gough May 02 '17 at 14:50
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@CurticeGough I'm not near a computer but I found an old post [here](https://askubuntu.com/questions/75755/how-to-change-the-lightdm-theme-greeter#75819) that may be a solution, like I said I'm not near a computer to verify. – nullmeta May 02 '17 at 15:11
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@Android Dev Ok I edited /etc/lightdm/lightdm.conf to use unity-greeter and then rebooted, but then it just wouldn't lock at all. – Curtice Gough May 02 '17 at 15:27
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@CurticeGough And this Ubuntu wiki may be helpful as it explains the config location [Ubuntu wiki](https://wiki.ubuntu.com/LightDM) – nullmeta May 02 '17 at 15:37
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1What do you mean it wouldn't lock at all? – nullmeta May 02 '17 at 15:50
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@nullmeta When I pressed `CTRL+ALT+L` the screen would not lock. – Curtice Gough May 02 '17 at 16:07
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@CurticeGough - Try this: https://askubuntu.com/a/75819/518562 – You'reAGitForNotUsingGit May 02 '17 at 18:12
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@AndroidDev I don't see how changing the greeter will fix the lock screen. – Curtice Gough May 02 '17 at 18:59
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@CurticeGough the greeter *is* the lockscreen. – You'reAGitForNotUsingGit May 02 '17 at 20:46
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@AndroidDev oh sorry. Ok I changed it to `unity-greeter` and uninstalled `gnome-screensaver` but it still didn't work. – Curtice Gough May 02 '17 at 21:07
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@CurticeGough - Have you tried to good old reboot? – You'reAGitForNotUsingGit May 02 '17 at 21:23
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@AndroidDev yes. It has been doing this for about a month. – Curtice Gough May 02 '17 at 22:02
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@CurticeGough Have you done `sudo apt-get purge lightdm-gtk-greeter`? – You'reAGitForNotUsingGit May 02 '17 at 22:16
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@AndroidDev yes – Curtice Gough May 02 '17 at 23:10