lightdm-settings is not opening (neither with GUI nor with Terminal)

[yamanidev]

Hello,
I am having an issue with starting lightdm-settings also known as Login Window (GUI) on my Linux Mint OS. So resorted to the terminal way using sudo lightdm-settings which gave me this output:

lightdm version: 1.30.0

(lightdm-settings:5797): GLib-GIO-ERROR **: 00:14:11.995: Settings schema 'x.dm.slick-greeter' does not contain a key named 'clock-format'

I've also tried using dconf-editor as suggested in this issue), but I did not find the "clock-format" key. Any ideas?

I'd appreciate any help I can get. Have a nice day.

[ghost]

I am currently getting the same issue.

[link0ff]

A workaround is to ensure that the file /etc/lightdm/slick-greeter.conf contains at least these lines:

[Greeter]
clock-format=%H:%M

[yamanidev]

@link0ff that works like a charm thank you!
Though this displays Could not load /etc/lightdm/lightdm.conf.

[MobiZaman]

I am having the same issue. I have tried all the solutions mentioned on the web, but to no avail.
I don't even have a file of the name "slick-greeter.conf". But I do have these:
lightdm.conf
lightdm.conf.d
lightdm-gtk-greeter.conf.d
users.conf
I added the clock-format line in lightdm.conf, but that didn't work as well.

[MobiZaman]

I am having the same issue. I have tried all the solutions mentioned on the web, but to no avail. I don't even have a file of the name "slick-greeter.conf". But I do have these: lightdm.conf lightdm.conf.d lightdm-gtk-greeter.conf.d users.conf I added the clock-format line in lightdm.conf, but that didn't work as well.

Actually I realized that I needed to create a new file named slick-greeter.conf. So I created it with this:
sudo xed /etc/lightdm/slick-greeter.conf
and pasted the following lines into it:

[Greeter]
clock-format=%H:%M

After this, the sudo lightdm-settings command worked and opened the Login Window.

[clefebvre]

Make sure you have slick-greeter 1.5.0 or newer installed.

linuxmint/slick-greeter@3970708

[clefebvre]

This was an issue on our side, triggered by a backport of lightdm-settings in Mint 20. It's fixed now. We backported slick-greeter 1.5.2 into Mint 20 today.