Comment # 2 on bug 1138357 from Takashi Iwai

Is it with a Nvidia graphics card?  There was a known regression in the last
Leap 15.1 kernel update and it has already fixed in git repo.
In anyway, please try the latest kernel in OBS Kernel:openSUSE-15.1 repo
  http://download.opensuse.org/repositories/Kernel:/openSUSE-15.1/standard/
It contains the latest build.