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The Raspberry Pi 3b+ runs my OpenGL 2.1 program very slowly, with a frame rate of around 2 fps. How is this possible, when Python/Pyglet can render (using OpenGL, I suppose) much faster than this? And how may I fix it? The OpenGL 2.1 program I speak of is a little app I made using a 2d game library that utilizes OpenGL 2.1 written in Go.

user96931
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For accelerated OpenGL 2.x support, you need to enable the (non-default-on-raspbian) open source graphics driver. Look for "experimental GL driver" in raspi-config.

Emma Anholt
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