Android开机启动app导致电源管理无法启动

一、问题现象：

      公司app在开机的时候自启，但是屏幕超时后不会灭屏。如果返回主界面后，屏幕就能灭屏。

二、问题分析和问题解决：

     利用usb打印调试log，对比装了app和不装app的区别，不装app会提示“android.intent.action.BOOT_COMPLETED”

     开启WindowManager 里的调试模式可以看到更多的信息：

10-26 11:58:29.360: I/WindowManager(1563): enableScreenIfNeededLocked: mDisplayEnabled=true mForceDisplayEnabled=false mShowingBootMessages=false mSystemBooted=true
10-26 11:58:30.570: D/AlertReceiver(2215): onReceive: a=android.intent.action.BOOT_COMPLETED Intent { act=android.intent.action.BOOT_COMPLETED flg=0x8000010 cmp=com.android.calendar/.alerts.AlertReceiver (has extras) }
10-26 11:58:30.580: D/AlertService(2215): 0 Action = android.intent.action.BOOT_COMPLETED
10-26 11:58:30.905: V/AlarmClock(2235): AlarmInitReceiver android.intent.action.BOOT_COMPLETED
10-26 11:58:31.425: I/LauncherIconVisibilityManager(1706): Boot has been completed
10-26 11:58:31.475: I/ActivityManager(1563): Start proc com.googlecode.eyesfree.setorientation for broadcast com.googlecode.eyesfree.setorientation/.BootReceiver: pid=2285 uid=10047 gids={50047}

<receiver android:name=".StartReceiver">
    <intent-filter>
          <!--<action android:name="android.intent.action.BOOT_COMPLETED" />-->
    </intent-filter></receiver>

2.通过usb设备接入检测，来达到自动启动的目的。我把BOOT_COMPLETED自启部分代码屏蔽掉，app还是可以自启；那么把usb接入检测屏蔽掉，app应该不会自启了吧

<intent-filter>
    <!--<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />-->
</intent-filter>

果然如此，原来app在系统启动的时候检测到有usb设备接入，就立即启动了app，然后没阻塞了系统BOOT_COMPLETED广播的传播，导致安卓系统一些服务没有正常的启动，电源管理也没启动，最终使得系统无法自动待机。

正常待机的调试信息如下：

10-23 15:51:50.031 1559-1584/system_process I/PowerManagerService: Going to sleep due to screen timeout...
10-23 15:51:59.836 1559-1588/system_process I/PowerManagerService: Waking up from sleep...
10-23 15:51:59.901 1559-1584/system_process D/DisplayPowerController: Unblocked screen on after 12375 ms
10-23 15:52:00.736 1559-1625/system_process D/PowerManagerService-JNI: Excessive delay in autosuspend_disable() while turning screen on: 8ms