Comment 6 for bug 1467695

Hello, a workaround that I have discovered is to disable framebuffer objects in the Compiz OpenGL plugin:

gsettings set org.compiz.opengl:/org/compiz/profiles/unity/plugins/opengl/ framebuffer-object false

Enter that in the terminal and it would take effect immediately; no logout required. Of course, we can expect that other desktop features that absolutely need OpenGL framebuffer objects might glitch or be affected in some way.

And again, this is just a workaround to make the unsightly behaviour go away, and by no means a fix. It does give a clue, though, that it's related to the use of framebuffer objects by whatever it is that renders shadows and glow effects.