An image forming apparatus is provided with a power supply switch, a control unit configured to transition the image forming apparatus into a suspend state when the power supply switch is turned off by an operation of a user, a device to which a power supply is stopped forcibly when the power supply switch is turned off by the operation of the user, and a notification unit configured to notify the control unit of an error that occurred on the device, and the control unit, in a case where the error is notified of by the notification unit, controls the image forming apparatus to revert from the suspend state and resets the image forming apparatus.