NoMachine not using hardware encoding in physical desktop connection

[MM_Texas]

On two Fedora 44 machines with NVENC-capable NVIDIA GPUs, NoMachine 9.8.2 never uses the hardware encoder for physical-desktop connections. nvidia-smi reports the encoder engine at 0% and 0 encoder sessions at all times, while nxcodec.bin consistently burns 15-32% of a CPU core doing software encoding. NVENC on the same machine is verifiably functional — ffmpeg drives the encoder engine to 88% on demand. This appears to contradict KB article AR01T01151, which states GPU-accelerated video encoding is “always used, where available, when connecting to the physical display… This is the typical case of connections to the Enterprise Desktop or to the free edition of NoMachine.” I’m running latest Fedora kde x11 on both and NoMachine (server) 9.8.2-2 x86_64, built Wed Jul 8 2026. Pls see attached md file for all the details. It looks like whether I use 1 monitor (1920×1080) or dual (3840×1080) the HW Encoder doesn’t work and thus consumes excessive CPU.

Attachments:

1. nomachine-nvenc-report.txt

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