[Galaxy Ace II Android Development] mcguolo:
I catched the log for systemui crash. As my battery level reached 20% my phone started to lock te screen repeatedly (I heard the lock sound multiple times). I don't know if this happens with latest rom by poppmensa, as I am currently downloading it, but to try to reproduce the error should be sufficient to let your phone discharge till 20%.

(Log attached)

The useful part - I think - it's below:

E/AndroidRuntime( 1156): FATAL EXCEPTION: main
E/AndroidRuntime( 1156): Process: com.android.systemui, PID: 1156
E/AndroidRuntime( 1156): android.view.InflateException: Binary XML file line #21: Error inflating class com.android.keyguard.KeyguardMessageArea
E/AndroidRuntime( 1156):	at android.view.LayoutInflater.createView(LayoutInflater.java:620)
E/AndroidRuntime( 1156):	at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
E/AndroidRuntime( 1156):	at android.view.LayoutInflater.parseInclude(LayoutInflater.java:816)
E/AndroidRuntime( 1156):	at android.view.LayoutInflater.rInflate(LayoutInflater.java:745)
E/AndroidRuntime( 1156):	at android.view.LayoutInflater.rInflate(LayoutInflater.java:758)
E/AndroidRuntime( 1156):	at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
E/AndroidRuntime( 1156):	at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardHostView.getSecurityView(KeyguardHostView.java:996)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardHostView.showSecurityScreen(KeyguardHostView.java:1035)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardHostView.showPrimarySecurityScreen(KeyguardHostView.java:789)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardHostView.onFinishInflate(KeyguardHostView.java:425)
E/AndroidRuntime( 1156):	at android.view.LayoutInflater.rInflate(LayoutInflater.java:763)
E/AndroidRuntime( 1156):	at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
E/AndroidRuntime( 1156):	at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardViewManager.inflateKeyguardView(KeyguardViewManager.java:651)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardViewManager.maybeCreateKeyguardLocked(KeyguardViewManager.java:631)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardViewManager.show(KeyguardViewManager.java:187)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardViewMediator.handleShow(KeyguardViewMediator.java:1284)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardViewMediator.access$1800(KeyguardViewMediator.java:107)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardViewMediator$4.handleMessage(KeyguardViewMediator.java:1101)
E/AndroidRuntime( 1156):	at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime( 1156):	at android.os.Looper.loop(Looper.java:136)
E/AndroidRuntime( 1156):	at android.app.ActivityThread.main(ActivityThread.java:5146)
E/AndroidRuntime( 1156):	at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 1156):	at java.lang.reflect.Method.invoke(Method.java:515)
E/AndroidRuntime( 1156):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:732)
E/AndroidRuntime( 1156):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)
E/AndroidRuntime( 1156):	at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime( 1156): Caused by: java.lang.reflect.InvocationTargetException
E/AndroidRuntime( 1156):	at java.lang.reflect.Constructor.constructNative(Native Method)
E/AndroidRuntime( 1156):	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
E/AndroidRuntime( 1156):	at android.view.LayoutInflater.createView(LayoutInflater.java:594)
E/AndroidRuntime( 1156):	... 27 more
E/AndroidRuntime( 1156): Caused by: java.util.UnknownFormatConversionException: Conversion:
E/AndroidRuntime( 1156):	at java.util.Formatter$FormatSpecifierParser.unknownFormatConversionException(Formatter.java:2306)
E/AndroidRuntime( 1156):	at java.util.Formatter$FormatSpecifierParser.advance(Formatter.java:2300)
E/AndroidRuntime( 1156):	at java.util.Formatter$FormatSpecifierParser.parseConversionType(Formatter.java:2379)
E/AndroidRuntime( 1156):	at java.util.Formatter$FormatSpecifierParser.parseArgumentIndexAndFlags(Formatter.java:2350)
E/AndroidRuntime( 1156):	at java.util.Formatter$FormatSpecifierParser.parseFormatToken(Formatter.java:2283)
E/AndroidRuntime( 1156):	at java.util.Formatter.doFormat(Formatter.java:1071)
E/AndroidRuntime( 1156):	at java.util.Formatter.format(Formatter.java:1042)
E/AndroidRuntime( 1156):	at java.util.Formatter.format(Formatter.java:1011)
E/AndroidRuntime( 1156):	at java.lang.String.format(String.java:1999)
E/AndroidRuntime( 1156):	at android.content.res.Resources.getString(Resources.java:380)
E/AndroidRuntime( 1156):	at android.content.Context.getString(Context.java:358)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardMessageArea.getChargeInfo(KeyguardMessageArea.java:280)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardMessageArea.update(KeyguardMessageArea.java:232)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardMessageArea$2.onRefreshBatteryInfo(KeyguardMessageArea.java:174)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardUpdateMonitor.sendUpdates(KeyguardUpdateMonitor.java:1006)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardUpdateMonitor.registerCallback(KeyguardUpdateMonitor.java:1001)
E/AndroidRuntime( 1156):	at com.android.keyguard.KeyguardMessageArea.<init>(KeyguardMessageArea.java:196)
E/AndroidRuntime( 1156):	... 30 more
W/ActivityManager( 2225): Process com.android.systemui has crashed too many times: killing!