Changing GDM Login Screen Behavior: No gdm.d directory

I am running Fedora 28 and am attempting to disable the user list in GDM (as the machine is domain joined, this is undesirable). In CentOS 7 this is as simple as putting a file named "00-login-screen" in "/etc/dconf/db/gdm.d/" with the contents:

[org/gnome/login-screen]
disable-user-list=true

In this case, there is no "gdm.d" directory. Creating it, and then putting the file in the directory does not work. I've seen elsewhere that a file needs to be created in "/etc/dconf/profile" called "gdm", but I have created this file with the contents:

user-db:user
system-db:gdm
file-db:/usr/share/gdm/greeter-dconf-defaults

and it makes no difference.

Has the procedure changed that substantially in Gnome 3.28.2 compared to 3.22.2?

EDIT: This problem now occurs in CentOS 7 as well, likely due to a Gnome update.

thunderbird32

Posted 2018-05-17T18:17:44.383

Reputation: 1

Sincere apologies for going totally off-topic, but 'No GDM' [Gina X Performance] was a huge underground euro dance floor hit in the early 80's... & now I can't stop singing it ;-) – Tetsujin – 2018-05-17T19:20:01.150

1@Tetsujin, yes it's making it rather harder to Google this than it should be. :P – thunderbird32 – 2018-05-17T20:03:36.857

Answers

Navigate to /usr/share/gdm/dconf , where you'll find a file called 00-upstream-settings ; Make a copy of it and give it a higher numbered prefix (e.g. from 00 to 90). The settings are pretty self-explanatory.

If I'm not mistaken, it could be that the name of the corresponding setting has changed in the meantime, but adding disable-user-list and setting it to false should work anyway. Don't forget to run dconf update from your terminal to make the changes take effect.

Greets

Joey

Posted 2018-05-17T18:17:44.383

Reputation: 101

The directory /usr/share/gdm/dconf also does not exist. The only directories I have in the /usr/share/gdm directory is: autostart,greeter, and env.d. 00-upstream-settings only exists in the directory /etc/dconf/db/ibus.d/. – thunderbird32 – 2018-05-17T19:50:52.863

@thunderbird32 I'm sorry, I've just realized that we have different Gnome versions (I have 3.28.1-1) so on my machine it worked ... Some time ago I had some problems logging in with 'light-dm', after which I switched to 'gdm'. In the worst case, another login manager maybe could also be an option ;-) good luck – Joey – 2018-05-17T21:52:38.210

su -
mkdir /etc/dconf/db/gdm.d && chmod 0755 /etc/dconf/db/gdm.d
cat > /etc/dconf/db/gdm.d/00-login-screen <<EOF
[org/gnome/login-screen]
disable-user-list=true
EOF
touch /etc/dconf/db/gdm && chmod 0644 /etc/dconf/db/gdm
dconf update

Sparsile

Posted 2018-05-17T18:17:44.383

Reputation: 1

Welcome to Super User! Although this may help to solve the problem, it doesn't explain why and/or how it addresses the issue. Providing this additional context would significantly improve its long-term educational value. Please edit your answer to add explanation, including what limitations and assumptions apply. Thanks. – fixer1234 – 2018-12-28T22:23:00.217

This does not fix the issue either, and in fact the only difference in this from what I did, is creating a blank /etc/dconf/db/gdm. It current versions this file already exists, so this isn't particularly helpful. – thunderbird32 – 2019-01-04T14:33:24.013