Fail to load Gazebo

[Manolo844]

Hi, while launching this command : ~/PX4-Autopilot/build/px4_sitl_default/bin/px4, I always get the same error :

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
ERROR [gz_bridge] Service call timed out. Check GZ_SIM_RESOURCE_PATH is set correctly.
ERROR [gz_bridge] Task start failed (-1)
ERROR [init] gz_bridge failed to start and spawn model
ERROR [px4] Startup script returned with return value: 256

I tried multiple times, but gazebo always launches with a black screen, and then crashes. I also checked the GZ_SIM_RESOURCE_PATH variable and it's empty so i tried to export it with a path that contains worlds models : export GZ_SIM_RESOURCE_PATH=/home/users/PX4-Autopilot_PATCH/Tools/simulation/gz/worlds. But it doesn't change anything.

If you have any clue, thanks in advance

[SathanBERNARD]

Hi, did you run the command immediately after installing? If so, please make sure to open a new terminal before running it. The installation script modifies the ~/.bashrc file, which is executed each time a new terminal is opened.

If it’s still not working, could you let me know if you’re using a VM or if there’s anything unique about your setup that might differ from a fresh Ubuntu installation on a dedicated machine?

[SathanBERNARD]

I can reproduce this error by running the command in a virtual machine with limited hardware resources. The issue appears to be caused by gz_bridge taking too long to initialize.

If you're using a virtual machine, could you try increasing the resources allocated to it?

[Manolo844]

Thanks for the answers, I'm not using a VM, but I do have a dual boot setup. Maybe it's a resource issue because of that. I'll try using another laptop to see if I encounter the same problem. By the way, what is supposed to be modified in the ~/.bashrc file? I can't see any new lines, so maybe the installation didn't go well either

[SathanBERNARD]

The line added to .bashrc is: source /opt/ros/humble/setup.bash (or source /opt/ros/jammy/setup.bash) for the ubuntu24 branch.
It seems that people who are experiencing the same type of issue as you are modifying the timeout in this file: https://github.com/PX4/PX4-Autopilot/blob/81552fc036be687d323339b3f0a861c24a1ffb20/src/modules/simulation/gz_bridge/GZBridge.cpp#L915C34-L915C38