I have a Dell Inspiron 6400 and I am seeing the same symptoms. When I upgraded from Dapper to Edgy, I could never get it to hibernate. (I am seeing the same problem with a much older Sony Vaio PCG-XG19 on feisty Herd 5).
-- Wont suspend (or hibernate), won't say why, and is annoying. https://launchpad.net/bugs/50785 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs