Comment # 24 on bug 111122 from James Le Cuirot

It's hard to tell who's talking about which issue as there seems to be two or
even three different ones going on here.

I believe I'm seeing the originally reported issue as iommu=pt helps on my
2700U. Without it, I get heavy corruption throughout KDE. I'm running OpenSUSE
Leap 15.1 with kernel-default 5.2.10-1.g5878ee6. Going back to 5.1 also works.