B757-200
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Flight Crew Returned To Departure Airport
Aircraft
Received cabin altitude warning at 10;000 feet. Returned to [departure airport] and landed uneventfully overweight. Cabin auto 1 on MEL placard. Auto 2 failed to pressurize aircraft.
B757 Captain reported returning to departure airport after the aircraft failed to pressurize.