08-14 03:17:35.557 548-3023/system_process I/ShutdownThread: Performing low-level shutdown...
08-14 03:17:35.616 548-630/system_process W/System.err: java.io.IOException: write failed: EROFS (Read-only file system)
08-14 03:17:35.616 548-630/system_process W/System.err:     at libcore.io.IoBridge.write(IoBridge.java:498)
08-14 03:17:35.616 548-630/system_process W/System.err:     at java.io.FileOutputStream.write(FileOutputStream.java:186)
08-14 03:17:35.616 548-630/system_process W/System.err:     at android.graphics.Bitmap.nativeCompress(Native Method)
08-14 03:17:35.616 548-630/system_process W/System.err:     at android.graphics.Bitmap.compress(Bitmap.java:1027)
08-14 03:17:35.616 548-630/system_process W/System.err:     at com.android.server.am.TaskPersister$LazyTaskWriterThread.run(TaskPersister.java:557)
08-14 03:17:35.616 548-630/system_process W/System.err: Caused by: android.system.ErrnoException: write failed: EROFS (Read-only file system)
08-14 03:17:35.616 548-630/system_process W/System.err:     at libcore.io.Posix.writeBytes(Native Method)
08-14 03:17:35.616 548-630/system_process W/System.err:     at libcore.io.Posix.write(Posix.java:271)
08-14 03:17:35.616 548-630/system_process W/System.err:     at libcore.io.BlockGuardOs.write(BlockGuardOs.java:313)
08-14 03:17:35.616 548-630/system_process W/System.err:     at libcore.io.IoBridge.write(IoBridge.java:493)
08-14 03:17:35.616 548-630/system_process W/System.err: 	... 4 more
08-14 03:17:35.616 548-630/system_process D/skia: ------- write threw an exception