libGL error / X Error of failed request: GLXBadContext

[alexanderadam]

Running simple2d applications on Ubuntu 20.04.2 (focal) doesn't work for me.
I'm getting this error:

libGL error: MESA-LOADER: failed to open iris (search paths /usr/lib/x86_64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
libGL error: failed to load driver: iris
libGL error: MESA-LOADER: failed to open iris (search paths /usr/lib/x86_64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
libGL error: failed to load driver: iris
libGL error: MESA-LOADER: failed to open swrast (search paths /usr/lib/x86_64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
libGL error: failed to load driver: swrast
X Error of failed request:  GLXBadContext
  Major opcode of failed request:  152 (GLX)
  Minor opcode of failed request:  6 (X_GLXIsDirect)
  Serial number of failed request:  112
  Current serial number in output stream:  111

I'm not claiming that this is simple2d's 'fault' but I guess here might be some people who know the answer and i guess it would be nice to document the fix somewhere.

PS: Thank you so much for creating simple2d! 🙏

PPS: There's no nVidia card involved, only a simple Intel Iris Plus Graphics G7 in case that's somehow relevant