Hardware encoding not work with AMD GPU on HP T620 and Linux Mint 21.3

[kermu]

Hello,

I’m using NoMachine on an HP T620 thin client running Linux Mint 21.3 with kernel version 5.15.0-144-generic. I’ve noticed that hardware encoding is not working — the server always falls back to software encoding.

I’ve reviewed the article [AR02U01190](https://kb.nomachine.com/AR02U01190), which suggests installing AMD GPU drivers from the official AMD repository (https://repo.radeon.com/amdgpu/).

Currently, I’m using the open-source drivers provided by the distribution:

`bash
$ dpkg -l | grep -i xorg | grep -i radeon
ii  xserver-xorg-video-radeon  1:19.1.0-2ubuntu1  amd64  X.Org X server — AMD/ATI Radeon display driver
`

Could you please confirm whether the proprietary AMD GPU drivers from repo.radeon.com are still required to enable hardware-accelerated encoding in NoMachine on AMD GPUs? Or is hardware encoding expected to work with the open-source radeon or amdgpu drivers from the distribution?

Thanks in advance for your support!

Best regards,
Krzysztof

[Author]

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