https://bugs.freedesktop.org/show_bug.cgi?id=91656
Nicolai Hähnle nhaehnle@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|NEW |RESOLVED
--- Comment #16 from Nicolai Hähnle nhaehnle@gmail.com --- For what it's worth, a comment in the hack posted on the forum says
"PoE tries to read from and render to a texture at the same time when rendering the minimap. This happens directly after clearing the fbo to (0, 0, 0, 0) so bind a dummy texture with that value instead."
So this was either a PoE bug (so-called "feedback loop") or possibly a driver bug related to clearing a currently bound texture that was fixed recently. In any case, this seems to be fixed now, so closing this report.