I. To demonstrate safety and feasibility of ipilimumab and nivolumab at the standard doses of drug in solid tumor and relapsed refractory HIV-classical Hodgkin lymphoma (cHL) participants with human immunodeficiency virus (HIV) infection given the possibility of increased toxicity based on immune activation, co-morbidity, or interference with highly active antiretroviral therapy (HAART) therapy. (Dose De-escalation and Dose Expansion Cohorts)