android 4.2.1上模拟器无法启动

W/MountService(  287): getVolumeState(/mnt/sdcard): Unknown volume^M
W/dalvikvm(  287): threadid=33: thread exiting with uncaught exception (group=0x40a70930)^M
I/SystemServer(  287): NetworkStats Service^M
E/AndroidRuntime(  287): *** FATAL EXCEPTION IN SYSTEM PROCESS: MountService#onDaemonConnected^M
E/AndroidRuntime(  287): java.lang.IllegalArgumentException^M
E/AndroidRuntime(  287):        at com.android.server.MountService.getVolumeState(MountService.java:1503)^M
E/AndroidRuntime(  287):        at com.android.server.MountService.warnOnNotMounted(MountService.java:1583)^M
E/AndroidRuntime(  287):        at com.android.server.MountService.getSecureContainerList(MountService.java:1596)^M
E/AndroidRuntime(  287):        at com.android.internal.content.PackageHelper.getSecureContainerList(PackageHelper.java:193)^M
E/AndroidRuntime(  287):        at com.android.server.pm.PackageManagerService.updateExternalMediaStatusInner(PackageManagerService.java:9557)^M
E/AndroidRuntime(  287):        at com.android.server.pm.PackageManagerService.scanAvailableAsecs(PackageManagerService.java:9539)^M
E/AndroidRuntime(  287):        at com.android.server.MountService$3.run(MountService.java:744)^M
I/Process (  287): Sending signal. PID: 287 SIG: 9^M
I/Zygote  (   37): Exit zygote because system server (287) has terminated^M
E/installd(   40): eof^M
E/installd(   40): failed to read size^M
I/installd(   40): closing connection^M

I/ServiceManager(   30): service 'power' died^M

操作：

1、source ./build/envsetup.sh

2、在第二步选择generic

3、编译完成后执行emulator -kernel kernel/goldfish/arch/arm/boot/zImage -sysdir out/target/product/generic -system system.img -data userdata.img &

4、模拟器无法启动，出现上述错误，导致systemserver挂掉

解决办法:在第2步选择full，再运行模拟器

原因：未知

附：编译出的kernel一定要是arm-v7，而不是arm，否则还是无法启动。