Abstract: A method for power-efficient touch input, in which touch sensor data from a touch input is obtained by touch circuitry. Touch sensor data is obtained from touch input at touch circuitry included in a device that also includes a system-on-a-chip (SOC) and a display controller stack outside of the SOC. The touch sensor data is stored in a buffer. When the SOC is in a low-power state, the touch sensor data is communicated to the display controller stack for immediate display.

Abstract: A computer system may be powered up or awakened from a power-saving state with one single user action. An authentication device may be used to detect a user action and to collect data from the user action. An authentication module may be used to authenticate a user based on the data collected by the authentication device. A controller may enable a user to access a non-volatile storage medium for user credentials necessary to power up or awaken the computer system.