Comment # 4 on bug 968826 from Takashi Iwai

(In reply to Petr Vanek from comment #3)
> actually there are no such options in welcome screen in leap/tumbleweed
> installed (I remember them from 13.2)

So 13.2 worked in the past on your system?

> also bios disabled wifi won't help.
> 
> can I access boot logs somehow?

If it's not WiFi, the next possible problem is the graphics.  But, I thought
nouveau KMS isn't enabled during boot.  In anyway, you can try "nomodeset" boot
option, too.