https://bugs.kde.org/show_bug.cgi?id=488860
--- Comment #2 from Vlad Zahorodnii <vlad.zahorod...@kde.org> --- The show fps effect is not a proper profiling tool and it can report sometimes lower refresh rates if the screen is not being repainted actively. Regarding GL_INVALID_OPERATION, it's a Qt issue. -- You are receiving this mail because: You are watching all bug changes.