Abstract: A head-mounted device is provided that includes one or more cameras configured to acquire a raw video feed and one or more displays configured to present a passthrough video feed to a user. Generation of the passthrough video feed can involve processing the raw video feed using an image signal processor and auxiliary compute blocks. One or more of the auxiliary compute blocks can be bypassed in response to detecting one or more failures associated with the auxiliary compute blocks. Configured and operated in this way, the head-mounted device can fall back to a more reliable passthrough video feed without having to power cycle the head-mounted device when a failure occurs.

Abstract: A request to transition a computing system from a first state to a second state is received, and a respective manifest is compiled for each of a plurality of processors of the computing system. Each manifest comprises a transition identifier representing a command to transition from the first state to the second state and an action time for executing one or more operations associated with the transition identifier. The respective manifests are dispatched to the plurality of processors, and status reports are received from the plurality of processors regarding the transition from the first state to the second state.