Ubuntu 20.04.4 LTS NoMachine client crashes and hangs

[Jerry Tunin]

I have an odd issue where randomly the NoMachine client will crash X and hang the computer.  The client computer is running Ubuntu 20.04.4 LTS.  The video card is an AMD but there is also an NVIDIA card that I pass-through to local KVM VMs.  I almost seems like a video driver hangs and then locks up the machine.

[Britgirl]

Hi, it could be a problem with drivers. Have you tried separate NoMachine sessions for AMD and nvidia cards? What happens?

Can you try disabling hardware decoding on the client side? To do that, please edit the $HOME/.nx/config/player.cfg and change the ‘Enable hardware accelerated decoding’ key to:

option key=”Enable hardware accelerated decoding” value=”disabled” 

What’s the result?

[Jerry Tunin]

The Nvidia card is headless and doesn’t have a display attached.  I just tried disabling the hardware decoding and will see if we get another crash.

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