I was delighted to see the update for the beta version 5.8b above however with a fresh install of ubuntu 20.04.3 kernel 5.11 and driver 21.30 promised working in PM post above but clinfo doesnt even see a single card just the IGFX which obv isnt used for mining. Using chipset B550 and the only way i have ever been able to get pm working under ubuntu on driver later than 20.40 is single GPU only long ago. Maybe its a bios thing im not used to such modern mobo, currently got pci set to gen 1 - Any ideas? And in my defence i wil state that without touching a bios setting i can boot into Manjaro and mine with 6 x RX6800XT although stale shares are running around 20% using driver 20.40 and opencl as per this info:
https://community.amd.com/t5/drivers-software/6900xt-and-opencl-on-linux/td-p/439474/page/2