This white paper introduces the complexity of power management at the software level for mobile devices by means of Linux and Android. The complexity of hardware power management is mirrored in software. A single defect in the power management scheme can have a catastrophic impact on the standby time of a mobile device. We outline how Synopsys Virtual Prototypes address major challenges in the bring-up and validation of power management software. Furthermore, we introduce how virtual prototypes can be used for software-centric power estimation and analysis.