Operating system: Linux-5.0.0-32-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: AMD Radeon VII ATI Technologies Inc. 4.5.13572 Core Profile Context 5.0.73
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-11-06 20:48, hash: rB85637311c28f
Radeon VII with linux/openCL/cycles is extremely slow, even with correct driver. I have been trying different driver/OS stacks for weeks, and have asked for tech support on both Blender Artists and AMD's community tech support forum.
Please, I want to help get to this bottom of this problem. This is an expensive, mainstream card which was advertised as compute focused and open source friendly. I created a very nice bug report T71400 after spending weeks trying different things and coming to the end of my rope. This bug report was closed as invalid because the day before i filed it I installed steam which caused Mesa to show up in the top of the report. (even though i explained this in the report itself). Please don't just close this as invalid. I want to help...