Could you check also 4.12.14-lp150.12.19? We need to narrow down the possible regression range. Also, you can try the latest KOTD http://download.opensuse.org/repositories/Kernel:/openSUSE-15.0/standard/ And, you're using Nvidia binary-only driver, or using nouveau? Last but not least, since the bug appears on a real hardware, please give the hardware details. At least, attach the output from hwinfo to Bugzilla, as well as the output of dmesg from both working and non-working kernels.