Cannot start UE4 in Ubuntu 20.04 due to SDL( it cant initialize SDL)

Development Programming & Scripting UI
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Hello Community,

I am really new to Linux and Unreal Engine but I thought it is never to late… Ubuntu 20.04 is running in WSL2 on Windows 10.

I have followed the documention (Linux Quick Start | Unreal Engine Documentation ) and got the the last step! Unfortunetly, I do get this message:

``[2021.03.12-06.46.34:704] 0]LogInit: Warning: Could not initialize SDL: X11 not available
[2021.03.12-06.46.34:704] 0]LogInit: - Physical RAM available (not considering process quota): 25 GB (25594 MB, 26208420 KB, 26837422080 bytes)
[2021.03.12-06.46.34:704] 0]LogInit: - VirtualMemoryAllocator pools will grow at scale 1.4
[2021.03.12-06.46.34:704] 0]LogInit: - MemoryRangeDecommit() will be a no-op (re-run with -vmapoolevict to change)
[2021.03.12-06.46.34:728] 0]LogInit: Physics initialised using underlying interface: PhysX
[2021.03.12-06.46.34:748] 0]LogInit: Using OS detected language (en-US-POSIX).
[2021.03.12-06.46.34:748] 0]LogInit: Using OS detected locale (en-US-POSIX).
[2021.03.12-06.46.34:749] 0]LogTextLocalizationManager: No specific localization for ‘en-US-POSIX’ exists, so the ‘en’ localization will be used.
[2021.03.12-06.46.34:898] 0]LogInit: Initializing SDL.
[2021.03.12-06.46.34:902] 0]LogInit: Warning: Could not initialize SDL: X11 not available
[2021.03.12-06.46.34:902] 0]LogInit: Warning: FLinuxSplashState::InitSplashResources() : InitSDL() failed, there will be no splash.
[2021.03.12-06.46.34:902] 0]LogInit: Initializing SDL.
[2021.03.12-06.46.34:906] 0]LogInit: Warning: Could not initialize SDL: X11 not available
[2021.03.12-06.46.34:906] 0]LogInit: Error: FLinuxApplication::CreateLinuxApplication() : InitSDL() failed, cannot create application instance.
[2021.03.12-06.46.34:906] 0]LogCore: FUnixPlatformMisc::RequestExit(bForce=true, ReturnCode=1)
[2021.03.12-06.46.34:906] 0]LogCore: FUnixPlatformMisc::RequestExit(1)
`

I did install the latest release of lib sdl with

`sudo apt-get install -y libsdl2-2.0-0`

But it did not work… What do I do wrong??

Many thanks in advance!
type or paste code here

2

If you’re running it under WSL on Windows—and you’ve never run any other Linux GUI software under WSL—I suspect you’re missing the WSL GPU drivers; they are not installed by default, and the GUI support layer of WSL is disabled unless you have them. Which means there’s indeed nothing for SDL to represent graphics on.

There’s a Microsoft support page detailing how to get GUI support under WSL 2.

Hopefully that helps!

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