Re: how to totally get rid of nvidia-settings configurations on login
Thanks. I think this conclusively shows that the X server starts up in the correct configuration just fine, and that something in your desktop environment is turning your VGA device off when you log in as your normal user. The VGA-0 device is listed as connected, so it's not that the driver is incorrectly reporting it as disconnected.
At this point, I would recommend checking the KDE configuration pages to see if you can find a display settings option that lets you turn on both displays, or contact your distribution's support community to see if other people have had similar problems.