Comment # 10 on bug 1087525 from Takashi Iwai

Hrm, so it works now?  That's surprising.  Let's concentrate on the Leap 15.0
kernel, then.

OK, now could you just boot straight without nomodeset but keeping blacklist?
Does it boot with the native graphics?

If yes, try to remove blacklist, mkinitrd, and boot without nomodeset.
Does it break again?