  For one-mode light described by the Wigner function of generic Gaussian form
the photon distribution function is obtained explicitly and expressed in terms
of Hermite polynomials of two variables.The mean values and dispersions of
photon numbers are obtained for this generic %mixed state.Generating function
for photon distribution is discussed.Known partial cases of thermal
state,correlated state,squeezed state and coherent state are considered.The
connection of Schrodinger uncertainty relation for quadratures with photon
distribution is demonstrated explicitly.
