RetroPie v4.8, SDL 2.0.20: EmulationStation unable to create window

FranceMSR

Hi all, installed RetroPie v4.8 from scratch on Raspberry Pi v4. For my emulator I need to use SDL 2.0.20 for a good support of OpenGLES and GLSL.

So I removed installed SDL2 with

sudo apt remove --purge libsdl2-2.0-0 libsdl2-dev

then built SDL2 from source code. My emulator works as expected (it runs from terminal without X11) but EmulationStation won't start.

SDL built with

../configure

and also with

../configure --enable-video-kmsdrm --enable-video-opengles --enable-video-opengl

and also with

../configure --enable-video-kmsdrm --enable-video-opengles --enable-video-opengl --enable-video-rpi --enable-video-x11

but nothing changes. The error is this:

Can't load EGL/GL library on window creation

With SDL 2.0.20 GL and GLSL versions are these:

GL: OpenGL ES 3.1 Mesa 19.3.2
GLSL: OpenGL ES GLSL ES 3.10

So, why EmulationStation won't start and why don't you pre-install SDL 2.0.20 that has a big improvement on KMSDRM?

UPDATE:
Tried to remove then build EmulationStation from source, nothing changes

BuZz

@FranceMSR There are issues with SDL 2.0.20 which is why we haven't switched to it. We have a number of fixes against the code in our fork also. We also do some changes during the building in regards to dependencies and some workarounds - you can apply the changes from this and build it from our fork if you like https://github.com/RetroPie/RetroPie-Setup/pull/3390/files

Some software (eg darkplaces quake) won't work though due to issues with the kmsdrm backend - https://github.com/libsdl-org/SDL/issues/5399

This is another issue (But we have a fix for this in our repo) https://github.com/libsdl-org/SDL/issues/5348

FranceMSR

@BuZz said in RetroPie v4.8, SDL 2.0.20: EmulationStation unable to create window:

@FranceMSR There are issues with SDL 2.0.20 which is why we haven't switched to it. We have a number of fixes against the code in our fork also. We also do some changes during the building in regards to dependencies and some workarounds - you can apply the changes from this and build it from our fork if you like https://github.com/RetroPie/RetroPie-Setup/pull/3390/files

Some software (eg darkplaces quake) won't work though due to issues with the kmsdrm backend - https://github.com/libsdl-org/SDL/issues/5399

This is another issue (But we have a fix for this in our repo) https://github.com/libsdl-org/SDL/issues/5348

Ok I made those changes in

/home/pi/RetroPie-Setup/scriptmodules/supplementary/sdl2.sh

then executed

sudo /home/pi/RetroPie-Setup/retropie_packages.sh sdl2 install_bin

Now both EmulationStation and my emulator work. Info about GL and GLSL show these values instead the previous reported ones:

GL: 2.1 Mesa 19.3.2
GLSL: 1.20

I hope that I won't have problem in the future with OpenGL Shaders

FranceMSR

@BuZz said in RetroPie v4.8, SDL 2.0.20: EmulationStation unable to create window:
...you can apply the changes from this and build it from our fork if you like https://github.com/RetroPie/RetroPie-Setup/pull/3390/files

Hi, here again. I made the same changes for a Raspberry Pi v3 and enabled fkms on config.txt (otherwise my emulator runs at 20 FPS). Now EmulationStation won't start with

* failed to add service - already in use?

Any tips? Thank you!

FranceMSR

@FranceMSR after the update of EmulationStation (from binary), followed by another installation of SDL 2.0.20 from RetroPie branch, now also my emulator runs slow (with or without fkms enabled in config.txt).

What's wrong with Raspberry Pi 3?

FranceMSR

For who is interested, I have build Mesa 22.0.1, SDL 2.0.20 and EmulationStation from source code on latest Raspberry Pi OS Lite and all work as expected (Full KMS and other stuff)