Nonnormality of remainders of some topological groups

It is known that every remainder of a topological group is Lindelof or pseudocompact. Motivated by this result, we study in this paper when a topological group G has a normal remainder. In a previous paper we showed that under mild conditions on G, the Continuum Hypothesis implies that if the Ccch-Stone remainder G* of G is normal, then it is Lindelof. Here we continue this line of investigation, mainly for the case of precompact groups. We show that no pseudocompact group, whose weight is uncountable but less than c, has a normal remainder under MA+inverted left perpendicular CH. We also show that if a precompact group with a countable network has a normal remainder, then this group is metrizable. We finally show that if C-p(X) has a normal remainder, then X is countable (Corollary 4.10) This result provides us with many natural examples of topological groups all remainders of which are nonnormal.