I can confirm this. I have tried the same stuff on 2 identical HP xw8400 workstations with nvidia quadro graphics. One I installed using i386 and the other using amd64. The i386 one worked correctly but not the amd64. And I have reinstalled on both machines and switched i386/amd64 and I would definitely say that it is a problem on the amd64 one.
-- usplash appears black and white (grayscale) on amd64 https://launchpad.net/bugs/67545 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs