Comment # 5 on bug 1000386 from Wolfgang Bauer

(In reply to John Shand from comment #4)
> when i pressed ESC nothing happened

Then try to boot without the boot splash please:
(In reply to Wolfgang Bauer from comment #3)
> Or if that has no effect, add "plymouth.enable=0" to the boot options (press
> 'e' at the boot menu and append that to the line starting with "linux" or
> "linuxefi", or add it in YaST->System->Boot Loader->Kernel Parameters.

Hopefully you will get boot messages then, that should show at what point in
the boot process it "hangs".

As this "long pause" happens even before the login screen shows, it can't be a
problem of the KDE desktop.
It may be the login screen that takes long to start though.
So please also try to set DISPLAYMANAGER="xdm" in
/etc/sysconfig/displaymanager, to use a simpler one, and see if that helps.

If not, it must be a problem on some lower level, like e.g. a failing mount or
similar.
Maybe the top lines of "systemd-analyze blame" will give a clue.