I I have a fresh install of linux mint 20, which is based on ubuntu 20.04, I think. I tried the AMD driver automatically installed, and BOINC doesn't see it. So then I tried adding the ppaibaf/graphics-drivers repository. BOINC still does not see the GPU. Next I tried installing the latest driver directly from AMD. Still nothing. I then tried adding the OpenCL dev packages. Failure.

What is the secret in getting the latest linux, with the latest AMD driver, and the latest version of BOINC to work for GPU crunching? What am I missing?