Do AMDGPU Drivers exist for this APU? I am trying to get Davinci Resolve to work in Ubuntu and of course it's giving a no GPU detected message. Davinci Resolve works perfect on Windows 10 so I would assume it can be made to work on Linux. Any advice would be much appreciated.
Not experience in Linux.
I went to AMD Download page for your Ryzen 7 Pro 4750g and there are no Linux Drivers to download. Only Windows 10 which seems to indicate that Linux is not compatible with drivers for that processor yet: https://www.amd.com/en/support/apu/amd-ryzen-pro-processors/amd-ryzen-7-pro-4000-series-desktop-proc...
Try posting your question at Phoronix.com which is a very good Linux Website. Maybe someone there can tell you how to get your Ubuntu to work with the Integrated Graphics from here: https://www.phoronix.com/forums/forum/linux-graphics-x-org-drivers/open-source-amd-linux
Also open a thread at Davinci Resolve Forums or Support and see if they are aware of any Linux drivers for the Pro 4750g Integrated Graphics.
Here is the latest AMDGPU Pro driver and it doesn't mention any Integrated Graphics as being compatible: https://www.amd.com/es/support/kb/release-notes/rn-amdgpu-unified-linux-20-10
Not sure if this will work in Linux but this previous thread in Davinci Resolve Forum mentioned to increase the vRAM to maximum to get it to work correctly in BIOS: https://forum.blackmagicdesign.com/viewtopic.php?f=21&t=122565
So the processor works fine on my Ubuntu 20.04 Linux System. The Linux Kernel comes baked in with excellent support for AMD Processors and Graphics but Davinci Resolve specifically looks for a qualified GPU. The 4750G is essentially an iGPU and isn't noticed by Resolve in Linux without using AMD's AMDGPU drivers. Unfortunately I had already went to the AMD driver page for the Ryzen 7 Pro 4750G and saw no Linux driver. I thought the RX Vega Series portion of the AMDGPU driver might mean it would work since this processor has Vega 8 Graphics built in but no joy. I will look at some of those other sites you suggested and see if I can come up with anything.
From this link showing the Davinci Resolve Minimum System Requirements, you need a GPU with at least 4 GB of vRAM to work: https://www.richardlackey.com/davinci-resolve-system-requirements/
But reading further in the article it mentions that you can use a GPU with 2GB or less but you won't be able to do as much with the software.
EDIT: Have you checked to see if in Linux the GPU is recognized (Not in Davinci Resolve)?
If it is then the problem is strictly with Davinci Resolve and whatever driver that is installed in linux is working.
Does Davinci Resolve need OpenCL working? Can you check to see if Linux shows OpenCL enabled for your IGPU?
I believe it does need openCL and that's why I was trying the AMDGPU drivers. I know it can work because it works on Windows 10, which I have installed on a second SSD. I can boot Windows or Ubuntu and both work perfectly for everything except Ubuntu doesn't allow Resolve to start and work whereas Windows does.