@contrapicado
For clarity, ref dusx's post re usb adaptors, all monitors in the set up I referred to were ran from the native DP/HDMI and DVI outputs on the custom PC graphics card.
The DVI may have had a HDMI-DVI adaptor; it has been a while. The science gallery (dublin) has since closed down- a casualty of covid related funding amongst other reasons.
The set up ran pretty well for the duration.
With respect to your set up, I am not sure how many monitors you have etc.
- Try your set up 1-2 monitors at a time to see where the offender may be.
- Try the monitors individually and then start doubling up till you encounter the open GL issue.
- I assume you are on the latest version of Isadora etc.
- As Dusx said, remove any usb adaptors and see if that is a solution.
Eamon