Carla: Help requested: Runnign carla on brand new headless UBUNTU server

[gilamid]

Just installed a brand new UBUNTU 16.04 server, headless, but with an NVIDIA GTX 1050Ti GPU
Trying to run CARLA using a remote sessions ( ssh -X It looks like I am missing some packages in the installation, but I can not figure out which
any help will be appreciated.

These are the issues I see in the log file:

LogPluginManager: Mounting plugin Carla
LogFileManager: Warning: ReadFile failed: Count=0 Length=4096 Error=errno=21 (Is a directory) for file
Init: Using libcurl 7.48.0-DEV

And then:

2018.03.15-11.49.52:907][  0]LogInit: Initializing SDL.
[2018.03.15-11.49.52:907][  0]LogInit: Using SDL_WINDOW_OPENGL
[2018.03.15-11.49.52:997][  0]LogInit: Warning: Could not initialize SDL: XRandR support is required but not available
[2018.03.15-11.49.52:997][  0]LogInit: Warning: FDisplayMetrics::GetDisplayMetrics: PlatformInitMultimedia() failed, cannot get display metrics
[2018.03.15-11.49.52:997][  0]LogLinux: Selected Device Profile: [LinuxNoEditor]

and then , the grand finale:

LinuxApplication::CreateLinuxApplication() : PlatformInitMultimedia() failed, cannot create application instance.
[2018.03.15-11.47.54:543][  0]LogLinux: Error: appError called: Assertion failed: Assertion failed:  [File:/home/nsubiron/UnrealEngine_4.17/Engine/Source/Runtime/Core/Private/Linux/LinuxApplication.cpp] [Line: 36] 
FLinuxApplication::CreateLinuxApplication() : PlatformInitMultimedia() failed, cannot create application instance.

Signal 11 caught.

[nsubiron]

Hi @gilamid,

Can you do the ssh connect without the -X flag? That causes Unreal to detect the X display and it tries to render to it usually crashing.

[nsubiron]

@felipecode Please add this to your tutorial to run headless as it's a common issue

[gilamid]

Thanks, indeed without the -X , the server runs with no warnings. This bring up a different question: you mention that it crashes when it tries to render to the Xdisplay. what is the way to redirect the rendering to a remote display ?

[nsubiron]

I am not aware of any way of redirecting to a remote display. Maybe with VirtualGL and TurboVNC you can achieve something like that, but we have never tried it.

[ciumonk]

x11vnc perhaps?

[liangbright]

For remote display on linux with GPU, I suggest to use https://www.realvnc.com/en/connect/download/vnc/ which is free for personal use. You need to launch a desktop on the server, then run the vncserver.