GPU not detected

[ableeker]

People in this forum said to modify FAHClient (it's text). Open /etc/init.d/FAHClient, and change USER at the top of the file from fahclient to root. It seems to be a permission thing, this did the trick for me. FAHControl now says this:

GPUs 1
GPU 0 Bus: 3 Slot: 0 Func: 0 AMD: 5 Vega 10 XL/XT [Radeon RX Vega 56/64]
OpenCL Device 0 Platform: 0 Device:Bus: 3 Slot:0 Compute:2.0 Driver: 3019.0

Admittedly, it's still not crunching GPU WU's, but that's to be expected at this time.

[bruce]

The install script is supposed to create a user named fahclient with restricted permissions and give its files the right permissions and then run the FAHClient daemon as that user. Debugging that installation failure is a bigger challenge than simply running as root ... and the added risk is minimal.

[tkoeller]

The client attempts to load libOpenCL.so, which I consider to be a bug. That link is part of the development package, which no program should depend upon at runtime. The correct thing to do would be to load libOpenCL.so.1 instead.

[ableeker]

The GPU is detected, and FAH has downloaded a WU today. But then it started on it, stopped, and complained about a BAD_WORK_UNIT. That's another topic I guess.

[ableeker]

I caved, I admit it. I was running Ubuntu 19.10 with ROCm 2.10 OpenCL, but in the end I just couldn't get FAH to work on GPU WU's. Even when FAH started to recognise the GPU, and OpenCL, it stopped with bad WU's. So today I decided to try AMD's OpenCL. Unfortunately, that's next to impossible to get working on anything but Ubuntu 18.04 LTS. So I did a clean install of 18.04, and have installed AMD OpenCL (part of amdgpu-pro, that's only supported on 18.04). This time this worked great, and I was able to install FAHClient. I could even install FAHControl without work-arounds, because can you just install python-gnome2 on 18.04. I still had trouble because FAH at first didn't recognise the GPU, and then couldn't find OpenCL. To fix this I had to add user fahclient to the video group, and modify FAHClient to start as root. Even when that was done, it didn't work straight away, I had to resort to stuff like setting GPU=true, restarting service FAHClient, and even restarting the computer. That took a while, but right now it's working on a CPU WU, and is halfway through a GPU WU! So I got there in the end.

[Frogging101]

I caved, I admit it. I was running Ubuntu 19.10 with ROCm 2.10 OpenCL, but in the end I just couldn't get FAH to work on GPU WU's. Even when FAH started to recognise the GPU, and OpenCL, it stopped with bad WU's. So today I decided to try AMD's OpenCL. Unfortunately, that's next to impossible to get working on anything but Ubuntu 18.04 LTS. So I did a clean install of 18.04, and have installed AMD OpenCL (part of amdgpu-pro, that's only supported on 18.04). This time this worked great, and I was able to install FAHClient. I could even install FAHControl without work-arounds, because can you just install python-gnome2 on 18.04. I still had trouble because FAH at first didn't recognise the GPU, and then couldn't find OpenCL. To fix this I had to add user fahclient to the video group, and modify FAHClient to start as root. Even when that was done, it didn't work straight away, I had to resort to stuff like setting GPU=true, restarting service FAHClient, and even restarting the computer. That took a while, but right now it's working on a CPU WU, and is halfway through a GPU WU! So I got there in the end.

I'm glad that you managed to get it working. In case you're interested, I have some more information about the OpenCL and permissions issues in my thread here: viewtopic.php?f=81&t=33353

[ableeker]

Frogging101, I've seen a number of install scripts, but your method looks quite interesting. I've tried these scripts, but none have worked for me so far on Ubuntu 19.10. That's why I've installed 18.04, you don't have to use a script. I was able to install OpenCL using the command 'amdgpu-pro-install --no-dkms --opencl=pal --headless', that's supposed to install OpenCL only. So far it has been working great, even allowing me to crunch FAH WU's. FAHClient, and FAHControl are content only to use OpenCL when it's installed just so, while other programs are quite happy to run any old OpenCL.

[Rainmaker]

Huh, I tell a lie... Earlier it was finally working, but i just checked again, and it's back to 'Not detected: clGetDeviceIDs() returned -1'. And, yes, fahclient is a member of the video group...

See this thread for the fix.

Edit: With this method (replacing the systemd service file) you don't need to run as root or do anything but add a GPU (with amdgpu-pro opencl installed) and run normally.