In Ubuntu 13.10 and 14.04 the "hibernate" option will always be displayed in the system dropdown menu, even if there is no active swap partition. Click the hibernate option will perform the hibernate operation but will fail during the process.
As a contrast, in Ubuntu 13.04 and earlier releases the "hibernate" option is visible only if there is active swap partition.
In Ubuntu 13.10 and 14.04 the "hibernate" option will always be displayed in the system dropdown menu, even if there is no active swap partition. Click the hibernate option will perform the hibernate operation but will fail during the process.
As a contrast, in Ubuntu 13.04 and earlier releases the "hibernate" option is visible only if there is active swap partition.