  We suggest new evolutionary scenarios for non-magnetic short orbital period
CVs. The first model is the analogy of the `hibernation scenario' or the
`modern hibernation scenario'. The second one is an extension of Mukai and
Naylor (1995) ideas. All models imply a tight connection between permanent
superhump systems and classical novae. We highlight the significance of the
observed evolution of V1974 Cyg, which might pose a major problem to Mukai and
Naylor concept.
