As a graduate student, you are making a commitment to devote the time and energy needed to complete your program requirements and/or engage in research and write a thesis. Your supervisor has a right to expect substantial effort, initiative, respect and receptiveness to suggestions and criticism.
The principal role of the supervisor is to help students achieve their scholastic potential. They will provide reasonable commitment, accessibility, professionalism, stimulation, guidance, respect and consistent encouragement to the student.
For research students, the supervisory committee should be in place by the end of the first academic year. Details on graduate student-supervisor relationships and expectations can be found in the Handbook of Graduate Supervision.