(made new account to unify usernames across various places I have accounts, previously @rtwx)
So I spent last night and this morning getting opencl support enabled in darktable; I added opencl-mesa from manjaro repo, but when I ran darktable -d opencl I got the following:
So… no good. worked out I needed ocl-icd by reading the Arch Wiki, but same result still.
I found some guides for adding the opencl bits from the amdgpu-pro package to the opensource driver in Ubuntu and Fedora, but not Manjaro.
I figured the AUR would be the answer, and eventually took a guess and installed opencl-amd and it worked!
Noticeable increase in speed, much closer to the speed of Lightroom on Windows. I usually process a few hundred images at a time from events, so loading time matters a lot to me.
Here are the packages installed on my system for reference: