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libgl_EmuELEC: use LIBGL_FB=0 when SDL2 runs on kmsdrm - #351
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Added a check for SDL2 kmsdrm to set LIBGL_FB.
Cebion
approved these changes
Oct 20, 2026
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On EmuELEC builds where SDL2 uses the kmsdrm video driver, gl4es with LIBGL_FB=4 opens /dev/dri/card0 itself and becomes DRM master before SDL does. SDL then fails with SET_MASTER: EBUSY / page flip EACCES and the port shows a black screen (e.g. Blobby Volley 2). With LIBGL_FB=0, gl4es renders into SDL’s window. Devices without kmsdrm are unaffected.