todxx,
So far, I only have 1 RX570 working in my server / workstation hardware. (BTW, previous version with lyra2z worked fine. 3.1, I think) Other RX570's in my celeron 6 card rig working great. Here is dmesg from a failing machine. FYI it's the whole thing since I don't know what parts will be helpful to you. Also, these machines boot up from PXE and xmr-stak starts by default. I went in and manually stopped it and started teamredminer before capturing the log. (Same workflow for working and non-working rigs)
https://pastebin.com/eVszbM85There's a few errors reported by the amdgpu driver. Some of these I remember seeing in older drivers that I thought were now fixed.
Is this the 18.30 driver or the 17.30 driver?
That log was Ubuntu 16.04, kernel 4.4, amdgpu-pro 17.30. I'll try and find time to spin up the other PXE server with 18.30 tomorrow and put up the log. Thanks for all the work!