Comment # 1 on bug 1177541 from Wolfgang Bauer

Might be related to/the same as bug#1159882...

Btw, I experienced similar problems here after upgrading to 15.2.
I then installed the latest kernel from
http://download.opensuse.org/repositories/Kernel:/stable/standard and things
are *much* improved now. (I'd say it wokrs even better than previous Leap
kernels...) ;-)