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So I work at a university using active directory, and in my office there are a few computers that I've set up, in Ubuntu 11.10, to log as an AD user.

In order to log in a person just needs to use the "other" user at login and use their university ID and Password. I've installed 12.04LTS on my personal computer, and I see that the "other" option no longer exists.

If I upgrade those computers who need AD login capabilities, will they have them?

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I also join my test machine to the domain with likewise, and in terminal doing "su - <user>" it works fine, but still don't have the "other" in X login. –  Pipe Apr 12 '12 at 13:08

3 Answers 3

up vote 18 down vote accepted

Edit /etc/lightdm/lightdm.conf and add the following line :


Then restart lightdm :

sudo service lightdm restart
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Works perfectly for me. –  Gerald Schneider Sep 17 '12 at 13:04
For later versions of Ubuntu (14.04) add this line to: /usr/share/lightdm/lightdm.conf.d/50-unity-greeter.conf –  L. D. James Jul 2 at 15:40

You can also hide all users so that you enter whatever name you want by editing /etc/lightdm/lightdm.conf adding :


This is particularly useful if you use NIS or LDAP services.

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From the Ubuntu wiki:

"LightDM configuration is governed by the lightdm.conf file, however it's not suppose to be directly edited, instead use:


All the answers suggesting you edit the conf file /are wrong/.

I found the file at /usr/lib/lightdm/lightdm-set-defaults

At the terminal you would enter:

sudo /usr/lib/lightdm/lightdm-set-defaults -m true

Please upvote the /canonical/ way to do this, rather than the incotrect manually editing conf files (which might get autogenerated and your settings overwritten). The internet would appreciate it.

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This utility (lightdm-set-defaults) does not exist on my system, and I can't figure out how to install it.… did not help, either. –  foobarbecue Apr 14 '14 at 16:10
@foobarbecue, check that topic again. It appears things have changed with v14.04, and lightdm-set-defaults has been deprecated. –  matt wilkie Jun 13 '14 at 20:20
Not just deprecated, removed, according to… –  armb Jan 23 at 10:17

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