One more thing: I noticed that the UUID put into /etc/fstab was indeed correct - still "swapon -a" did not work. This seems to imply that there are some incompatibilites between the swap signature used in dapper and edgy, possibly related to hibernation (hence the remarks above about swap space being corrupted).
** Summary changed: - Hibernation stops working after upgrade to edgy - "no valid swap signature, try swapon -a" + After upgrade from dapper to edgy, swap space is discarded, system fails to hibernate (invalid swap signature) ** Tags added: edgy hibernate regression swap swapon uuid -- After upgrade from dapper to edgy, swap space is discarded, system fails to hibernate (invalid swap signature) https://launchpad.net/bugs/66637 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
