Are you all on gnome-shell? I have the same transparency issue in gnome-session-flashback / lightdm, but only when using theme Ambiance. I moved to theme Adwaita and the transparency issues are gone.
Are you all on gnome-shell? I have the same transparency issue in gnome-session- flashback / lightdm, but only when using theme Ambiance. I moved to theme Adwaita and the transparency issues are gone.