  Taking advantage of the unparallel quantity and quality of high cadence
Kepler light curves of several dwarf novae, the strength of the flickering and
the high frequency spectral index of their power spectra are investigated as a
function of magnitude around the outburst cycle of these systems. Previous work
suggesting that the flickering strength (on a magnitude scale) is practically
constant above a given brightness threshold and only rises at fainter
magnitudes is confirmed for most of the investigated systems. As a new feature,
a hysteresis in the flickering strength is seen in the sense that at the same
magnitude level flickering is stronger during decline from outburst than during
the rise. A similar hysteresis is also seen in the spectral index. In both
cases, it can qualitatively be explained under plausible assumptions within the
DIM model for dwarf nova outbursts.
