I've seen this problem when I installed dapper on a friend's machine and then upgraded it to edgy. 2.6.15 boots, 2.6.17 doesn't as this bug earlier describes.
** Attachment added: "dmesg" http://librarian.launchpad.net/6609414/uname-a.log -- Linux hangs at boot after upgrade from Dapper to Edgy https://launchpad.net/bugs/85149 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
