  We study the link between neutrino oscillations and leptogenesis in the
minimal framework assuming an SO(10) see-saw mechanism with 3 families. Dirac
neutrino masses being fixed, the solar and atmospheric data then generically
induce a large mass-hierarchy and a small mixing between the lightest
right-handed neutrinos, which fails to produce sufficient lepton asymmetry by 5
orders of magnitudes at least. This failure can be attenuated for a very
specific value of the mixing sin^2(2\theta_{e3})=0.1, which interestingly lies
at the boundary of the CHOOZ exclusion region, but will be accessible to future
long baseline experiments.
