Ancoron: I am seeing this on my Macbook 1,1 (Core Duo), so it's not specific to 64-bit.
I'm running Ubuntu 9.04 beta (radeon 6.12.1, x.org, 1.6.0, kernal 2.6.28) with a radeon M56P (mobility X1600).
I'm also seeing the corruption on both screens, apparently unlike some others. If I disable one screen, or set them to clone rather than left-of/right-of, it clears up, but when it's happening both outputs are affected.
Ancoron: I am seeing this on my Macbook 1,1 (Core Duo), so it's not specific to 64-bit.
I'm running Ubuntu 9.04 beta (radeon 6.12.1, x.org, 1.6.0, kernal 2.6.28) with a radeon M56P (mobility X1600).
I'm also seeing the corruption on both screens, apparently unlike some others. If I disable one screen, or set them to clone rather than left-of/right-of, it clears up, but when it's happening both outputs are affected.