[SOLVED] No login screen after changing default theme

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[SOLVED] No login screen after changing default theme

Postby leoyoshiyang » Feb 17th, '21, 18:03

Good afternoon.

Using Mageia 8 beta KDE (and, before that, Mageia 7 with no problems whatsoever). I haven't applied updates in a while.

Yesterday I changed the default login theme in KDE system settings (Workspace --> Startup and Shutdown --> Login Screen (SDDM)) from default Mageia theme to some other. It asked for root password, I successfully applied it and closed settings.

Today, as I turned on the computer, it succesfully boots but there's no login screen, only a black screen with cursor. This is the only change I've done recently. Apart from that, everything has been very stable.

How can I restore default login theme and, hopefully, solve this problem? I can access Ctrl+Alt-F2.

Many thanks. Mageia is my favorite distro.
Last edited by leoyoshiyang on Feb 19th, '21, 19:09, edited 2 times in total.
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Re: No login screen after changing default theme

Postby doktor5000 » Feb 17th, '21, 22:06

The login screen theme for sddm is configured in /etc/sddm.conf in [Theme] section, you can comment the theme there and then it should use the default.
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Re: No login screen after changing default theme

Postby morgano » Feb 17th, '21, 23:24

It may be Bug 27601 - Blackscreen after an update of sddm
Referenced in Errata
So try changing the hostname to something else than localhost.
Mandriva since 2006, then Mageia since 2011 at home & work. Thinkpad T43 & T400, Dell M4400, Acer Aspire 7. Workstation using LVM, LUKS, VirtualBox, BOINC
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Re: No login screen after changing default theme

Postby leoyoshiyang » Feb 18th, '21, 22:01

After trying to edit "/etc/sddm.conf" and other related files with nano, with me realizing these files were about merely 5 lines long and seemed quite empty compared to what they should be, and after turning off and on about 6 times after searching and typing a lot but fixing nothing... the login screen suddenly appeared (after boot 6, I think). With the new theme...

Because I'm a basic user, I don't know what the bug was but it seems solved. Now I already updated everything to the latest. Thanks doktor5000 and morgano for the quick replies! Mageia is so good the problem solves itself! :lol:
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Re: No login screen after changing default theme

Postby doktor5000 » Feb 19th, '21, 18:55

Please mark the thread as solved by editing the subject of the first post and prefix it with [SOLVED], thanks in advance.
Cauldron is not for the faint of heart!
Caution: Hot, bubbling magic inside. May explode or cook your kittens!
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