leap 42.1 unreadable login screen

After fresh install leap 42.1 on hp compaq nw8440 the login screen is unreadable, only upper and bottom part of the screen are visible. Maybe wrong screen resolution. No such problem 13.1, 13.2

Video card, driver and what is setting in Yast-boot loader- Kernel parameters - Console resolution? if Current value not working try something else

I’ve changed boot loader resolution - effect is the same. Open radeon is the only suitable driver because the ATI Mobile FireGL5200 is no more supported by AMD. I suppose KDM screen resolution is wrong, but how to change it. Regards !