Hello, I'm looking to setup a simple Linux-based media center PC, as I really can't stand ad ridden TV interfaces, using an old tiny Lenovo Thinkcentre with a Ryzen 5 2400GE or something similar.
Does anyone have any experience with rendering 4K video on such a weak iGPU? All the information I seem to find is Windows only.
The important thing you want to look out for is hardware decoding.
This iGPU supports h264 and h265, so you should be fine with pretty much everything you throw at it. It does not support AV1, but adoption will take quite some time so I wouldn't bother.
When AV1 eventually gets mainstream you can just put a cheap (non-"gaming") GPU in there for 50$ or so.