I got this exact same problem with another machine after upgrading to edgy, when connecting via the same modem. The same solution works. I'm guessing from Jarmo's comments that it's the router, not the machine, that matters, so I won't post any details about this machine.
-- Network unreachable with Edgy https://launchpad.net/bugs/58927 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs