Comment # 3 on bug 1222345 from Takashi Iwai

You can find in my OBS repo, e.g.
  http://download.opensuse.org/repositories/home:/tiwai:/kernel:/6.7/backport/

Also, try Leap 15.6 kernel.
  http://download.opensuse.org/repositories/Kernel:/SLE15-SP6/pool/

This should work stably without surprises.