Carla: error: XDG_RUNTIME_DIR not set in the environment. in WSL Ubuntu 18.04

[jportella91]

When I run ./CarlaUE4.sh in the WSL, I obtain the following error:

4.22.3-0+++UE4+Release-4.22 517 0
Disabling core dumps.
error: XDG_RUNTIME_DIR not set in the environment.
CarlaUE4-Linux-Shipping: ../nptl/pthread_mutex_lock.c:434: __pthread_mutex_lock_full: Assertion `robust || (oldval & FUTEX_OWNER_DIED) == 0' failed.
Signal 6 caught.
Malloc Size=65538 LargeMemoryPoolOffset=65554
CommonUnixCrashHandler: Signal=6
Malloc Size=65535 LargeMemoryPoolOffset=131119
Malloc Size=99968 LargeMemoryPoolOffset=231104
Engine crash handling finished; re-raising signal 6 for the default handler. Good bye.
Aborted (core dumped)

I am new to WSL and Ubuntu. So I would appreciate a lot if you can explain me why is this error happening and how to fix it please. It is Carla 09.7 version

[nuomizai]

Hey, @jportella91 . I met the same problem when I ran CarlaUE4.sh in a server without ubuntu destop. The system is Ubuntu16.04. Unfortunately, I didn't fix that problem. But I ran the CarlaUE4.sh successfully in a destop computer. So I guess CarlaUE4.sh can not run in a headless system without a destop. So I installed carla in the docker and it works well with the server. You can look that in https://carla.readthedocs.io/en/latest/build_docker/. Or you can try to install ubuntu-desktop. But I found it not easy to install a ubuntu-desktop and I failed. If you had to try the second instruction, then good luck :)

[germanros1987]

@nuomizai @jportella91 CARLA can run headless in some configurations, but it seems that WSL is not one of them.
We have never testes a WSL setup...so chances are that this will not work. Could you try with the docker option, and check if that works?

[blackliner]

Hi, with WSL2 being able to run nvidia-docker2 with GPU support, I tried to get carla running. Unfortunately, I get an error message and directly thrown out of the docker again:

$ docker run --gpus=all -it carlasim/carla
4.24.3-0+++UE4+Release-4.24 518 0
Disabling core dumps.
sh: 1: xdg-user-dir: not found
$

[perseus784]

I too am facing the same issue as of @blackliner. Please let us know if you have found a solution to run it on wsl.

[AN-Ahmed]

Have anyone reached a solution regarding that?