Comment 41 for bug 345542

spydouglas, thanks, that is very useful. I understand I was wrong about the upstream versions, since the "linux-ports" versions do not match the "linux" versions: linux-ports 2.6.28-5.11 is based on linux 2.6.28-11.34 which again is based on upstream 2.6.28.8, whereas the linux-ports 2.6.28-4.10 is based on linux 2.6.28-9.29 (upstream 2.6.28.7)

So I guess testing the vanilla 2.6.28.8 makes most sense. If it works, the issue is caused by the Ubuntu patches on top. In particular, I see http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-jaunty.git;a=commit;h=85568da345d4348f33c69043c9bc4e78ad819706 was added. Did anyone try building drm modules? Either on the failing or the last good kernel.