Blank/Black screen on RPi 5 headless

[nguyen-v]

Hello all,

I’ve been having a lot of trouble connecting to a headless Raspberry Pi 5 running Ubuntu 24.04.2 LTS. If I plug in a screen in the Pi, I can connect to it with no issue. If a screen is not connected, I get a blank screen, and after a few minutes:

Here’s what I’ve tried so far:

1) Setting hdmi_force_hotplug=1 in /boot/firmware/config.txt

2) Reinstalling NoMachine both on the client and host. Currently running 8.16.1_1_x64 on windows, and8.16.1_1_arm64 on the Pi.

3) Disabling hardware decoding on Windows with

4) Trying the steps here NoMachine – Connecting To Linux Headless Machines With NoMachine – Knowledge Base

sudo systemctl stop display-manager

sudo /etc/NX/nxserver --restart

5) Disabling Wayland on the Pi in /etc/gdm3/custom.conf

WaylandEnable=false

6) Disabling hardware encoding in Server->Performance->Use hardware encoding on the Pi

I’m out of ideas, so I would be grateful if there is anything I can do to make it work.. Thanks for your help!

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