RetroArch Black Screen in OpenGL since latest release

[boohyaka]

Hi there,

I just upgraded my RetroArch install from 1.7.1 to 1.7.3 by decompressing redist.7z and _RetroArch.7z onto my existing folder. My config file was therefore untouched. 

Since then and while it worked fine just before the update, and even running RetroArch from the .exe directly, will only provide me with a black screen. If I open an actual ROM, emulation is running as I can hear the sound including menu sounds on input, only the video is missing.

My retroarch.cfg contains the following (hopefully relevant) info:

 

video_driver = "gl"

video_shader_enable = "true"

video_shader = "nul"

 

If I switch the video_driver to d3d, it works. If I leave it to gl, but set video_shader_enable to false, it works as well. So I do have workarounds as I never really played with shaders so far.

The interesting bit of info I believe is if I run the debug exe with --menu --verbose, I find this error in the log:

 

[INFO] [GL]: Using resolution 2560x1080
[INFO] [GL]: Default shader backend found: glsl.
[ERROR] [GL]: Not loading any shader, or couldn't find valid shader backend. Continuing without shaders.

Looks like something is wrong or corrupted with the default glsl shader? Or simply, a bug?

When it works if I set video_shader_enable to false, here is what I get at the same location:

[INFO] [GL]: Using resolution 2560x1080
[INFO] [GL]: Default shader backend found: glsl.
[INFO] [Shader driver]: Using GLSL shader backend.

 

Anybody has a clue what is happening? 

For reference I am on Windows 10 64bits, running RA 64bits, NVidia GTX 980 Ti with latest drivers 398.36.

 

Edit: added full log. No other error in there..

 

Thanks!

 

 

retroarch-log.txt

Edited July 13, 2018 by boohyaka
log added

[DOS76]

You should probably post this over at the Libretro forums. Some one may be able to help you here but they would be the guys to ask

[boohyaka]

Thanks for the answer - I wish I could, I created a new account but apparently I'm not allowed to post. I followed the bot 'new user tutorial' but still no obvious 'create topic' button. Nothing in the FAQ. By searching I found a topic where someone mentioned you need 5 posts to be allowed to create your own, is that correct? Thank you for confirming if you can otherwise I'll just look around some more. 

[Lordmonkus]

Black screen with sound is usually caused by an incompatible shader being loaded with with the core which is indicated by your log.

I have usually experienced this with the Mupen64 core and trying to use a CG shader.