I’m doing a brand new blank install of 12.1 with KDE and am running into an error.
I did the install wiping out the previous OS, set KDE as the desktop, selected Winbind for the authentication mechanism and joined the machine to AD.
When the machine reboots and KDE loads, I get the error message “Theme not usable with authentication method ‘Winbind / Samba’.”
If I click through the error, I get two username/password menus. One in the top left corner of the screen that also has the Domain dropdown that is populated with the AD domains for my network and then the standard KDE username/password menu in the center of the screen.
It is useless to hang your new problem/question at the end of a years old thread. Almost nobody will be subscribed to it anymore. And it will never show in the list of new threads where people will browse for new problems to help with.
Also you problem is about a very different version of all software involved.
So, please start a new thread in the Install/Boot/Login forum and make a good title with describes in short keywords what your problem is.
This thread will be CLOSED to avoid further littering.