stars/flares when using GPU acceleration

[truls-a]

Why do I get stars and flares in my render instead of sunlight when I turn on GPU acceleration?
I have a NVIDIA Quadro FX 880M CODA and Opel GL card. Everything works fine when i turn GPU acceleration off (maybe except glass...).

[CTZn]

If you are using the GPU, then exit portals should noy be used as of currently (3.0.15). Glass Acceleration may then be recommended for this scene, to test.

edit: the flares are from the aperture diffraction post-process effect reacting to the spare PT rays making their way through the portal. If that's only glass and there's no portals in scene just activate Glass Acceleration as noted above.