Whenever you ask how to undo anything,
You first have to describe what you began with, and then describe exactly what you did since.
From your prior posts in this thread, pls verify
- You originally installed your system with the XFCE Desktop.
- You installed a custom theme into your XFCE Desktop.
- You later installed KDE and Mate. It <may> be important to know which order they were installed, maybe not.
Currently, before you do any Desktop removal, I’d think that it’s important to verify what your DM and WM settings are, if they aren’t the defaults of your XFCE Desktop (which you’re trying to return to), I doubt that your original settings would be restored automatically.
To inspect your current DM and WM,
YAST > System > /etc/sysconfig settings > Display Manager > DISPLAYMANAGER
YAST > System > /etc/sysconfig settings > Window Manager > DEFAULT_WM
On my default XFCE,
DISPLAYMANAGER is blank but currently set to lightdm (possibly to support remote X)(I wouldn’t thought should be gdm)
DEFAULT_WM is set to xfce although curiously clicking the “Default” button sets to kde-plasma
After the above, I should think that you should be able to remove both the mate and kde Desktops(the following is untried), accept the default options
zypper rm mate kde
I would guess that you’ll still be left with all the applications which were installed by each Desktop, and likely more… Most of which would then be removable individually.
As for your non-working theme, I can only guess that it is the result in in a Display Manager or Window Manager change, but could caused by something else.
Remember that uninstalling anything/everything is always a “best effort” by the Package Manager, will never remove custom files created by any app and won’t likely remove configuration files for the app being removed.
This means that if you ever want to return to a state prior to installing something, in almost all cases that won’t be possible unless you create a backup prior to changes which you can restore.