Cracking failed on Radeon Pro WX5100

[dfns]

To narrow down whether this is a driver issue, or an issue with Hashcat with the new AMD GPUs, please test without KVM.

You are right, on bare-metal with Ubuntu LTS (kernel 4.8.0-36-generic), booted from LiveCD, it does crack examples without problem.
It does crash during benchmark on scrypt, with segfault in libamdocl64.so, so I'm assuming it's a bug in amd library.