High CPU usage on Tegra TX2

[lipigl]

Running NoMachine Server 6.6.8 on an NVIDIA Tegra TX2 module (arm64) running Ubuntu 16.04.6 LTS (Linux4Tegra R28 (release), REVISION: 2.1). The same version is running on the client machine, on Kubuntu 18.10. The Tegra board has no display connected, it’s showing a virtual display.

Right after booting the server, NoMachine+XOrg CPU usage seems normal (around 10%). However, after some minutes it starts growing (nxnode.bin takes around 60%, nxcodec.bin takes 88%, Xorg around 30%).

Is there any additional information I could provide to help find the cause of such high CPU usage?

 

[kroy]

Can you check if the problem still appears if you disable Xserver and allow NoMachine to create its own virtual frame buffer?

To do that – stop the running Desktop Manager (open terminal or connect there via SSH and execute command:sudo service lightdm) and restart nxserver (sudo /usr/NX/bin/nxserver --restart). Now you should be able to connect there via NoMachine and create a session.

[lipigl]

Hi kroy,

Sorry for my late answer, I was expecting to get an email when I got a message, so I didn’t read yours until I checked the forums!

If I kill the Desktop Manager and restart NoMachine, when I try to connect again I shortly get a black screen and then get kicked back to the ¨Recent connections¨ screen on the client (no matter how many times I try to connect). Rebooting the server board allows me to connect once again, with the original Desktop Manager session.

[kroy]

What desktop environment do you have there? Is it Unity? Please check DefaultDesktopCommand key in the /usr/NX/etc/node.cfg. It should be:

DefaultDesktopCommand "/usr/bin/dbus-launch --exit-with-session /usr/bin/gnome-session --session=ubuntu"

If you disable again Xserver and would be still black screen please collect logs sudo /usr/NX/bin/nxserver --debug --collect and send them and .xserver-errors file (should be in the home directory) to forum[at]nomachine[dot]com.

[Author]

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