Comment 347 for bug 252094

> a) the information about how to fix any issues wasn't included in the release notes. To me, it felt like Ubuntu was ignoring the problem, or worse trying to hide it.

Actually the information was included here:
http://www.ubuntu.com/getubuntu/releasenotes/904#Performance regressions on Intel graphics cards

> b) any changes are so major (new kernel rev., for instance) that they won't ever be back ported into 9.04 from 9.10

Currently the plan is to identify the specific kernel patches from the new kernel version that are felt to help the performance issue, and backport just those fixes. Whether this can be done without causing side effects remains to be seen in testing.