Comment 88 for bug 881830

The closest "Ubuntu" type kernel beyond the branch point is ecdd48d07f19ea63f8834c4a8cad328bab4f4d3b
The attached file shows how I got to this conclusion.
I.E. to continue with bisection and always get "Ubuntu" kernels (ones with ./debain/rules and such) the start point would be:

git bisect start Ubuntu-2.6.38-8.40 ecdd48d07f19ea63f8834c4a8cad328bab4f4d3b
Bisecting: 279 revisions left to test after this (roughly 8 steps)
[460ca35eb850250cb04416eef94c19b1fb818705] UBUNTU: [Config] build in CONFIG_AGP_AMD

Observation: The word "UBUNTU" will only be there if it is an Ubuntu kernel.

Of course, there no way to know for sure, until it is built and tested, if ecdd48d07f19ea63f8834c4a8cad328bab4f4d3b is actually a "good" starting point.

Now, if it would just compile.