This is related the the bug in AMD drivers 17.12.2 where the reporting of bus ID of OpenCL devices is completely broken (somebody already reported the bug to AMD: https://community.amd.com/thread/224200, but it won't be fixed before the next driver release). We have implemented a workaround in PhoenixMiner 2.3 but it appears that it doesn't fix the problem in your case (the second log you've send shows that you were running the beta version of PhoenixMiner 2.3).

Even so, the worst effect should be incorrect or entirely missing GPU monitoring information (temperature and fan speed), not a crash. We've tried tried to reproduce the problem on similar setup (with RX580 and RX570) but without success. Maybe try to go back to PhoenixMiner 2.2b, or install the blockchain drivers - the latest drivers doesn't appear to be any faster than the blockchain drivers anyway and we've had some issues with controlling GPU/memory clocks under them.


This seems about right as (according to Wikipedia) K2100M has 48 GB/s memory bandwidth so even if it is entirely memory bandwidth constrained it should be making 4-5 MH/s max. Still even if the laptop consumes 100W, you are making 0.3 USD per day (assuming electricity costs 0.1 USD per KWh)!   Just make sure that it is cooled very well or else it could broke down quite fast.