  We consider finite-temperature $SU(2)$ gauge theory in the continuum
formulation. Choosing the Landau gauge, the existing gauge copies are taken
into account by means of the Gribov-Zwanziger quantization scheme, which
entails the introduction of a dynamical mass scale (Gribov mass) directly
influencing the Green functions of the theory. Here, we determine
simultaneously the Polyakov loop (vacuum expectation value) and Gribov mass in
terms of temperature, by minimizing the vacuum energy with respect to the
Polyakov-loop parameter and solving the Gribov gap equation. The main result is
that the Gribov mass directly feels the deconfinement transition, visible from
a cusp occurring at the same temperature where the Polyakov loop becomes
nonzero. Finally, problems for the pressure at low temperatures are reported.
