I had a similar problem on a T400s with KDE 5.13.3 (KDE neon, based on Ubuntu 16.04; everything that should be blurred was black, e.g. Latte Dock or Konsole) and your PPA helped! Now everything looks fine again.
I had a similar problem on a T400s with KDE 5.13.3 (KDE neon, based on Ubuntu 16.04; everything that should be blurred was black, e.g. Latte Dock or Konsole) and your PPA helped! Now everything looks fine again.