An information processing apparatus includes a first controller and a second controller. The first controller is configured to control an operation of the overall information processing apparatus. The second controller is configured to control an operation of a device. When detecting a trigger of resumption from a power saving mode, the second controller notifies the first controller of the detection of the trigger, and starts to initialize a function corresponding to the trigger.

According to an embodiment, an image forming apparatus supplies, in a normal mode, electric power to an image forming device, and limits, in a power saving mode, power supplying to the image forming device to be less than that in the normal mode. The image forming apparatus communicates, in the normal mode, with a germicidal lamp apparatus via a communication interface such that the germicidal lamp apparatus generates no germicidal light, and communicates, in the power saving mode, with the germicidal lamp apparatus via the communication interface such that the germicidal lamp apparatus generates germicidal light.

A printer, according to an example, includes a sensor circuit to sense a position of an element of the printer, wherein the sensor circuit includes a comparison circuit to compare a sensed signal to a threshold signal and generate an output signal based on the comparison. The printer includes a controller to: repeatedly power on and power off the sensor circuit; receive the output signal of the comparison circuit when the sensor circuit is powered on, thereby receiving a plurality of output signals over time; and adjust the threshold signal based on at least one of the plurality of output signals.

An information processing apparatus includes a processor and a first device. The processor executes an operating system and a power control application, which operates on the operating system and controls a power mode of the information processing apparatus. The first device is connected to the processor to communicate with the processor, and notifies the operating system of a return time. The power control application notifies the first device of information indicating the power mode of the information processing apparatus. Based on the information notified by the power control application, the first device determines a return time of which the operating system is to be notified, and notifies the operating system of the determined return time. Based on the return time notified by the first device, the operating system determines a power saving state to which the processor is to shift, and shifts the processor to the determined power saving state.

A communication apparatus includes a connection unit, a storage unit, first and second processing units, and a control unit. The storage unit operates in one of a first state where a memory keeping process to keep information stored in the storage unit is executed in response to accepting an outside instruction, and a second state in which the memory keeping process is executed without accepting an outside instruction. The first processing unit performs a first process based on network received information and the stored information. The second processing unit performs a second process different from the first process and based on the stored information. The control unit forces the storage unit to transit from the first to the second state where the first and second processing units are not accessing the storage unit. Consumption power consumed in the first state is larger than consumption power consumed in the second state.

An information processing apparatus includes a first processor and a second processor. The first processor is operable to perform first processing and second processing in one of a plurality of operating states. The operating states includes a normal state and a power-saving state. The power-saving state is a state in which the first processor consumes less power than the normal state. The second processor is operable to perform the second processing while consuming less power than the first processor does. The second processor detects the first processing that the second processor is not able to perform. The second processor also causes the first processor to transition from the sleep state to the power-saving state to perform the first processing when the first processor is in a sleep state in which a power supply is stopped.

A method for controlling an image forming system includes a shifting process in which a wireless operation unit from a sleep state to a ready state; a connection process in which the wireless operation unit connects individually to each of a first image forming apparatus and a second image forming apparatus via wireless communication without a wireless LAN router in response to the shift of the wireless operation unit to the ready state in the shifting process; and a display process in which the touch panel display displays, side by side, a first return icon to return the first image forming apparatus to a ready state and a second return icon to return the second image forming apparatus to a ready state in response to the execution of wireless communication in the connection process.

According to an embodiment, an information processing apparatus includes an operation device and a controller. The operation device receives an instruction to turn off a power supply from a power supply device. when the operation device receives the instruction to turn off the power supply from the power supply device, the controller transmits a request of disconnection of the communication to the external apparatus. Further, the controller turns off the power supply from the power supply device after waiting for a predetermined time period after the transmission of the disconnection request.

A document processing system includes a power scheduling server configured to receive time-based usage data from a multifunction device. In response to receiving the usage data from the multifunction device, the power scheduling server analyzes the usage data and determines a power saving policy for the multifunction device. The power scheduling server transmits the power saving policy to the multifunction device. The multifunction device performs changes of operational state based on usage and in accordance with the received power saving policy.

It is an object to enable a request received from an outside to be automatically processed immediately before shifting to a power saving state such as a suspend state. On the way of a shift from a normal state to the suspend state and in a state where the shift cannot be interrupted, when a predetermined request such as a print job is received from an external interface, an MFP reserves a return to the normal state by turning on a wake-up reservation flag and continues a suspend process. When shifting to the suspend state, if the wake-up reservation flag is ON, a power supply control unit performs a return (resume) to the normal state even if no wake-up factor occurs.