Comment 171 for bug 397617

I haven't done extensive regression testing to prove it was the specific patch above but the issue was resolved between Lucid alpha-3 and beta-1. I suspect it was in the commit for bug 511965 in kernel 2.6.32-19.28. That patch may need to be expanded upon to include support for additional Macbook models or it may be another issue entirely for the 1,1 models. Since I only have a (working) 2,1 now I really can't confirm the issue with the 1,1s. Best to follow Steffen's instructions and keep reporting on bug 511965 with your hardware information until more information turns up.