Again this is Asus GL752 so it not regular hardware setup.
After installing MGA 6, on reboot there was correct login screen but after entering password noting happened, disabling nouveau and making intel xdriver worked.
Since this is dual video card laptop I have installed mageia-prime, after that I have very secure login screen. When you boot you may see Mageia logo, but for the moment you normally getting KDM screen gets blank (it looks same when driver is grabbing output) and stays that way, since I have already changed settings to bring focus to password I can actually log in and plasma is starting fine with all software reporting NVidia card working and it feels that way- is much faster than before on intel.
It would be nice to see login screen though.