Flatpak and OpenCL

Software darktable
1

A short while ago, I updated to Kubuntu 20.04. And with the OBS distribution not supporting 20.04, yet, I installed the flatpak version instead.

Initially, I had some issues with the lensfun database being out of date, but we found a workaround for that.

Also, my OpenCL stack (rocm) would not compile in the beginning, but this has since been resolved. But when starting a development version of Darktable for a different reason, I noticed that the Flatpak version does not seem to pick up my OpenCL stack, whereas the development version and the stock-Ubuntu version does.

Does anyone know why the Darktable Flatpak does not find the rocm OpenCL library?

2

Not sure if there is an AMD driver, but the nvidia driver installs like this:

flatpak install flathub org.freedesktop.Platform.GL.nvidia-390.116

1 Like
3

Note that nvidia-390 is the driver for older cards

4

Yes that is just an example… You need to find the correct one for your hardware.

5

I see. Being that rocm is still very much in-development and Ubuntu-LTS only, there is probably little chance for there being a flatpak yet.

Oh well, thank you for your help. I can stick with Ubuntu’s 3.0.1 until the OBS adds support for 20.04.

6

Hi,

not sure what 20.04 version you are looking for.
Looking at Install package graphics:darktable / darktable :slight_smile:

OBS provides in the “Latest Release” section darktable 3.0.2 package for xUbuntu 20.04 : https://download.opensuse.org/repositories/graphics:/darktable/xUbuntu_20.04/amd64/darktable_3.0.2-1.1_amd64.deb

7

Oh happy day! Many thanks for the heads-up!

8

Thanks for this. I’ve been looking forward to seeing opencl working with flatpaks for a while - great to see that at least with nvidia this is already supported.
I’ve used AMD/rocm opencl for years until recently and this was unsupported. I guess this is another side benefit of moving to nvidia.

9

Very side benefit :wink: I’m not sure what it’d take to get the and.opencl working for flatpak… But could it be harder than nvidia? No clue!