A method comprising: rendering and transmitting, by an application processor , display data to a display , the display data being display data for a frame, wherein the display data is stored in a frame buffer of the display for presentation as visual content; causing, by a display manager based on a computing device entering a state of low graphical activity, the application processor to write data to control registers of a low-power processor , wherein the control registers are utilized to coordinate low-power operation of the display between the application processor and the low-power processor , the low-processor has lower processing capabilities than the application processor, wherein said state of low-graphical activity is a mode in which a display refresh-frequency of visual content is decreased; causing, by the display manager based on the computing device entering the state of low graphical activity, the application processor to enter a low-power state; once data is written to the control registers of the low-power processor , transferring, by the display manager , control of the display from the application processor to the low-power processor ; and generating and sending to the display , by the low-power processor based on the computing device entering the state of low graphical activity and based on the data stored in the control registers by the application processor , additional display data which is not sufficient to over-write an entire frame of the frame buffer but comprises an updated version of a portion of the visual content, and wherein said additional display data is over-written into the display data of the frame buffer of the display to alter said portion of the visual content of the display. rendering and transmitting, by an application processor , display data to a display , the display data being display data for a frame, wherein the display data is stored in a frame buffer of the display for presentation as visual content; causing, by a display manager based on a computing device entering a state of low graphical activity, the application processor to write data to control registers of a low-power processor , wherein the control registers are utilized to coordinate low-power operation of the display between the application processor and the low-power processor , the low-processor has lower processing capabilities than the application processor, wherein said state of low-graphical activity is a mode in which a display refresh-frequency of visual content is decreased; causing, by the display manager based on the computing device entering the state of low graphical activity, the application processor to enter a low-power state; once data is written to the control registers of the low-power processor , transferring, by the display manager , control of the display from the application processor to the low-power processor ; and generating and sending to the display , by the low-power processor based on the computing device entering the state of low graphical activity and based on the data stored in the control registers by the application processor , additional display data which is not sufficient to over-write an entire frame of the frame buffer but comprises an updated version of a portion of the visual content, and wherein said additional display data is over-written into the display data of the frame buffer of the display to alter said portion of the visual content of the display. <EOS>