Zenith Electronics Corp may be irked that 6.1% shareholder Brookhurst Partners LP is not prepared to show up at its next board meeting to explain itself, but a Zenith shareholder is equally irked at both parties, and has named them jointly in a suit seeking more light on their plans: the suit alleges that both are misleading other Zenith holders: the suit seeks to have Brookhurst to disclose all material facts about its efforts to pressure Zenith into selling all or part of the firm and Zenith directors to be enjoined from efforts to entrench themselves as directors of Zenith.