Configure an headless server with Nvidia GPU with option to plug in monitor

[FredRon]

Hi,

I have a scenario where workstations with Nvidia GPUs have to be accessible through NoMachine without any monitor attached.

I know this xorg configuration allows to do just that:

pcibus=$(nvidia-xconfig –query-gpu-info | grep -o ‘PCI:.*’)
sudo nvidia-xconfig -a –allow-empty-initial-configuration –use-display-device=None –virtual=1920×1200 –busid {$pcibus}

However, if I want to revert to using a monitor, I have to undo this configuration and reboot the computer.

I would like to find a way to switch headless mode on and off at will, without rebooting the computer if it can be helped.

Is this the right place to ask this?

[graywolf]

Hello. I think rebooting is not necessary. In order to make changes effective, restarting the display manager is enough: systemctl restart display-manager.

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