[Bug 110635] briefly flashing corruption when playing various OGL games

https://bugs.freedesktop.org/show_bug.cgi?id=110635

--- Comment #6 from Andrew Sheldon asheldon55@gmail.com --- I get similar symptoms with Assassins Creed: Unity run under DXVK (with RADV). The issue doesn't occur with LLVM8, and seems to be a regression in LLVM9 since it worked fine with the last compile of LLVM9 I used (early May).

The workarounds don't work in my case (nodma, zerovram) so it might be a separate issue.

Here's a screenshot of the glitch: https://imgur.com/aUgSjW1 See top left for most obvious example of it, although you can see blockiness across the image.