系统电源，休眠状态程序求助！

  各位高手有没有关于usb camera的
restorestate
setDevicepowerstate
请高手指点，贴些程序让小弟学学。我是在做hct测试的时候遇到过不了这个问题的。
提示说
ERROR: PMTE_CheckForMustSupportedSleepStates(): System doesn't support sleep state S3
ERROR:     Work item completed with Error Code: -1073721810
ERROR:     The system does not support the S3 and the S4 system power states required.
ERROR:     PMTE_CheckForMustSupportedSleepStates(): System doesn't support sleep state S3
不支持s3,s4的系统状态，我修改了
restorestate
setDevicepowerstate
程序但是没有什么效果，也不知道怎么改。请高手们指点哦！