[One (M7) Android Development] j to the 4n:
It's xposed/gravitybox causing the issues....

12-20 13:18:53.355 E/EmbeddedLogger(1031): App crashed! Process: com.android.systemui
12-20 13:18:53.355 E/EmbeddedLogger(1031): App crashed! Package: com.android.systemui v18 (4.3-eng..20131004.162605)
12-20 13:18:53.355 E/EmbeddedLogger(1031): Application Label: System UI
12-20 13:18:53.355 E/AndroidRuntime(6524): FATAL EXCEPTION: main
12-20 13:18:53.355 E/AndroidRuntime(6524): java.lang.RuntimeException: Error receiving broadcast Intent { act=android.media.RINGER_MODE_CHANGED flg=0x28000010 (has extras) } in[COLOR="Red"] com.ceco.gm2.gravitybox[/COLOR].ModQuickSettings$1@4860b690
12-20 13:18:53.355 E/AndroidRuntime(6524):	at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java)
12-20 13:18:53.355 E/AndroidRuntime(6524):	at android.os.Handler.handleCallback(Handler.java)
12-20 13:18:53.355 E/AndroidRuntime(6524):	at android.os.Handler.dispatchMessage(Handler.java)
12-20 13:18:53.355 E/AndroidRuntime(6524):	at android.os.Looper.loop(Looper.java)
12-20 13:18:53.355 E/AndroidRuntime(6524):	at android.app.ActivityThread.main(ActivityThread.java)
12-20 13:18:53.355 E/AndroidRuntime(6524):	at java.lang.reflect.Method.invokeNative(Native Method)
12-20 13:18:53.355 E/AndroidRuntime(6524):	at java.lang.reflect.Method.invoke(Method.java:525)
12-20 13:18:53.355 E/AndroidRuntime(6524):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
12-20 13:18:53.355 E/AndroidRuntime(6524):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)
12-20 13:18:53.355 E/AndroidRuntime(6524):	at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:126)
12-20 13:18:53.355 E/AndroidRuntime(6524):	at dalvik.system.NativeStart.main(Native Method)
12-20 13:18:53.355 E/AndroidRuntime(6524): Caused by: java.lang.NullPointerException
12-20 13:18:53.355 E/AndroidRuntime(6524):	at com.ceco.gm2.gravitybox.ModQuickSettings$1.onReceive(ModQuickSettings.java:209)
12-20 13:18:53.355 E/AndroidRuntime(6524):	... 11 more
12-20 13:18:53.355 W/ActivityManager(1031): Process com.android.systemui has crashed too many times: killing!

12-20 13:18:55.006 I/[B]Xposed [/B](6615): java.lang.NoSuchMethodError: com.android.systemui.power.PowerUI#playLowBatterySound()#exact
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.XposedHelpers.findMethodExact(XposedHelpers.java:208)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.XposedHelpers.findMethodExact(XposedHelpers.java:155)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.XposedHelpers.findAndHookMethod(XposedHelpers.java:167)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at com.ceco.gm2.gravitybox.ModLowBatteryWarning.init(ModLowBatteryWarning.java:127)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at com.ceco.gm2.gravitybox.GravityBox.handleLoadPackage(GravityBox.java:186)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.IXposedHookLoadPackage$Wrapper.handleLoadPackage(IXposedHookLoadPackage.java:20)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.callbacks.XC_LoadPackage.call(XC_LoadPackage.java:34)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.callbacks.XCallback.callAll(XCallback.java:70)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.XposedBridge$2.beforeHookedMethod(XposedBridge.java:202)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.XposedBridge.handleHookedMethod(XposedBridge.java:527)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at android.app.ActivityThread.handleBindApplication(Native Method)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at android.app.ActivityThread.access$1300(ActivityThread.java)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at android.app.ActivityThread$H.handleMessage(ActivityThread.java)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at android.os.Handler.dispatchMessage(Handler.java)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at android.os.Looper.loop(Looper.java)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at android.app.ActivityThread.main(ActivityThread.java)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at java.lang.reflect.Method.invokeNative(Native Method)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at java.lang.reflect.Method.invoke(Method.java:525)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:126)
12-20 13:18:55.006 I/[B]Xposed [/B](6615):	at dalvik.system.NativeStart.main(Native Method)
12-20 13:18:55.026 W/InputMethodManagerService(1031): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@4959d7e0 attribute=null, token = android.os.BinderProxy@491a1580, client pid=6470, inputType=0x(null)
12-20 13:18:55.036 W/FingerprintManager(6615): No such file: /sys/module/vfsSpiDrv/parameters/fp_mount
12-20 13:18:55.036 I/QuickSettings(6615): support_finger_print:false
12-20 13:18:55.046 I/[B]Xposed [/B](6615): java.lang.NoSuchMethodError: com.android.systemui.statusbar.phone.QuickSettings#addSystemTiles(android.view.ViewGroup,android.view.LayoutInflater)#exact
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.XposedHelpers.findMethodExact(XposedHelpers.java:208)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.XposedHelpers.findMethodExact(XposedHelpers.java:155)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.XposedHelpers.findAndHookMethod(XposedHelpers.java:167)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at com.ceco.gm2.gravitybox.ModQuickSettings.init(ModQuickSettings.java:438)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at com.ceco.gm2.gravitybox.GravityBox.handleLoadPackage(GravityBox.java:203)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.IXposedHookLoadPackage$Wrapper.handleLoadPackage(IXposedHookLoadPackage.java:20)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.callbacks.XC_LoadPackage.call(XC_LoadPackage.java:34)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.callbacks.XCallback.callAll(XCallback.java:70)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.XposedBridge$2.beforeHookedMethod(XposedBridge.java:202)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.XposedBridge.handleHookedMethod(XposedBridge.java:527)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at android.app.ActivityThread.handleBindApplication(Native Method)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at android.app.ActivityThread.access$1300(ActivityThread.java)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at android.app.ActivityThread$H.handleMessage(ActivityThread.java)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at android.os.Handler.dispatchMessage(Handler.java)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at android.os.Looper.loop(Looper.java)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at android.app.ActivityThread.main(ActivityThread.java)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at java.lang.reflect.Method.invokeNative(Native Method)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at java.lang.reflect.Method.invoke(Method.java:525)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:126)
12-20 13:18:55.046 I/[B]Xposed [/B](6615):	at dalvik.system.NativeStart.main(Native Method)t.main(Native Method)