[Galaxy S II Android Development] rqmok:
Hey there!

I flashed v2.6 with hotfix over v2.5 without wipe. Then I flashed v2.8 over v2.6 with hotfix. Now, whenever I try to open Settings -> Device -> Advanced Lock Screen the screen freezes and goes back to the home screen, saying that Settings has stopped.

I believe this part of the logcat is the problem:

[ 05-06 19:35:26.404 2134: 2214 I/InputReader ]
Touch event's action is 0x1 (deviceType=0) [pCnt=1, s=]

[ 05-06 19:35:26.404 2134: 2213 I/InputDispatcher ]
Delivering touch to current input target: action: 0x1

[ 05-06 19:35:26.404 2134: 2213 I/InputDispatcher ]
Delivering touch to current input target: action: 0x1

[ 05-06 19:35:26.404 2134: 2213 I/InputDispatcher ]
Delivering touch to current input target: action: 0x1

[ 05-06 19:35:26.484 2134: 2535 D/PowerManagerService ]
acquireDVFSLockLocked : type : DVFS_MIN_LIMIT frequency : 1000000 uid : 1000 pid : 2134 tag : ActivityManager

[ 05-06 19:35:26.489 2134: 2535 I/power ]
*** acquire_dvfs_lock : lockType : 1 freq : 1000000

[ 05-06 19:35:26.489 4225: 4225 D/AndroidRuntime ]
Shutting down VM

[ 05-06 19:35:26.489 4225: 4225 W/dalvikvm ]
threadid=1: thread exiting with uncaught exception (group=0x4129c2a0)

[ 05-06 19:35:26.489 2134: 2535 W/ActivityManager ]
mDVFSLock.acquire()

[ 05-06 19:35:26.494 4225: 4225 E/AndroidRuntime ]
FATAL EXCEPTION: main
android.content.ActivityNotFoundException: Unable to find explicit activity class {com.lockscreen.galaxy/com.lockscreen.galaxy.ConfigActivity}; have you declared this activity in your AndroidManifest.xml?
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1556)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1431)
at android.app.Activity.startActivityFromChild(Activity.java:3894)
at android.app.Activity.startActivityFromChild(Activity.java:3870)
at android.app.Activity.startActivityForResult(Activity.java:3471)
at android.app.Activity.startActivityForResult(Activity.java:3407)
at android.app.Activity.startActivity(Activity.java:3617)
at android.app.Activity.startActivity(Activity.java:3585)
at android.preference.Preference.performClick(Preference.java:967)
at android.preference.PreferenceScreen.onItemClick(PreferenceScreen.java:229)
at android.widget.AdapterView.performItemClick(AdapterView.java:301)
at android.widget.AbsListView.performItemClick(AbsListView.java:1280)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:3071)
at android.widget.AbsListView$1.run(AbsListView.java:3973)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4921)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
at dalvik.system.NativeStart.main(Native Method)

[ 05-06 19:35:26.529 2134: 2169 E/android.os.Debug ]
!@Dumpstate > dumpstate -k -t -z -d -o /data/log/dumpstate_app_error

[ 05-06 19:35:26.534 4939: 4939 I/dumpstate ]
begin

[ 05-06 19:35:27.809 2134: 2202 W/PowerManagerService ]
Timer 0x3->0x3|0x0

[ 05-06 19:35:31.154 4843: 4843 D/MTPRx ]
DRIVER_TIME_OUT 60s lapsed

[ 05-06 19:35:31.509 2134: 2204 D/KeyguardViewMediator ]
setHidden false

[ 05-06 19:35:31.509 2134: 2204 D/WindowManager ]
PhoneWindowManager: focusChangedLw

[ 05-06 19:35:31.509 2134: 2204 D/WindowManager ]
mInputFocus is not null.

[ 05-06 19:35:31.514 2134: 2204 D/KeyguardViewMediator ]
setHidden false

---------------------------------------------EDIT----------------------------------------------------

I fixed the above problem by installing Galaxy Locker from Play Store.