I upgraded one of 4 machines here from Leap 4.2 to 4.3; te least imporant asI wated to test first. It seems OK but two oddities strike me
1: After boot ad log in my initial xterm has a black bar behind/above the top of the window frame. Moving the xterm it goes away but can come back on change of focus. Why? What is it telling me? This is running fwm as WM ad no gnome or KDE
2. On booting i jst see a bright spot and no animation or picture, but on shutdown it looks like 42.2 did. What is happening? Does it matter?
Is “drm-kmp-default-4.9.79_4-5.2” installed? I was guessing that this would fix your problems. But you might have a different issue.
Looking more closely at the boot screen there are 3 light question marks with no animation.
The “animation” is these question marks showing up one at a time. This is the text version of the plymouth splash screen. It shows up when plymouth doesn’t like something about your graphics.
I had that happen a lot, mostly in Tumbleweed. So I turned it off (removed “splash=silent” from the grub boot line). Now I see the boot messages instead. But I don’t think seeing those question marks is any reason for concern.