No HW encoding after resume from suspend

[Sven]

I’ve installed NoMachine 8.11.3 (free version) on Linux Mint 21.3. The system has a GT 730 GPU. When I connect to the system the connection uses HW encoding:

But after I suspend and wake the system the connection is now downgraded to SW encoding. This is only fixed with rebooting the system.

Any idea how I can debug that?

I’ve installed the nvidia-driver-470 470.239.06-ubuntu0.22.04.1, which are the latest available on Mint.

And I had to add an “exit” 0 at the top of the /usr/bin/nvidia-sleep.sh file, otherwise the system would immediately wake up again and NoMachine wouldn’t work at all until I rebooted.

[Sven]

I have the same problem with an GTX 970 and 535 drivers.

[Sven]

I’ve collected some debug log from NoMachine and saw this after resume:

NvInitCuda: ERROR! Failed to initialize CUDA device.
NvInitCuda: ERROR! Error is: ‘3e7’.

Unfortunately, this seems to be pretty normal with Nvidia…

https://forums.developer.nvidia.com/t/bug-nvidia-uvm-needs-to-be-removed-and-re-inserted-in-order-to-work-after-wakeup-from-suspend/188453/16

[Britgirl]

Hi Sven, thanks for coming back with your findings and the link. This is indeed a bug with the nvidia drivers and not something that we can fix in the NoMachine software.

[Author]

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