diff --git a/reactos/boot/bootdata/txtsetup.sif b/reactos/boot/bootdata/txtsetup.sif
index 3b9d25cb692..0f6bc673e67 100644
--- a/reactos/boot/bootdata/txtsetup.sif
+++ b/reactos/boot/bootdata/txtsetup.sif
@@ -40,7 +40,7 @@ Cabinet=reactos.cab
 [SetupData]
 DefaultPath = \ReactOS
 ;OsLoadOptions = "/NOGUIBOOT /NODEBUG"
-OsLoadOptions = "/NOGUIBOOT"
+OsLoadOptions = "/NOGUIBOOT /DEBUGPORT=COM1"
 ;OsLoadOptions = "/NOGUIBOOT /DEBUGPORT=SCREEN"
 ;OsLoadOptions = "/NOGUIBOOT /DEBUGPORT=BOCHS"
 
diff --git a/reactos/ntoskrnl/dbgk/dbgkobj.c b/reactos/ntoskrnl/dbgk/dbgkobj.c
index eeb87ea6132..6ee27f8b582 100644
--- a/reactos/ntoskrnl/dbgk/dbgkobj.c
+++ b/reactos/ntoskrnl/dbgk/dbgkobj.c
@@ -14,7 +14,7 @@
 
 POBJECT_TYPE DbgkDebugObjectType;
 FAST_MUTEX DbgkpProcessDebugPortMutex;
-ULONG DbgkpTraceLevel = 0; //-1;
+ULONG DbgkpTraceLevel = 0;
 
 GENERIC_MAPPING DbgkDebugObjectMapping =
 {
diff --git a/reactos/ntoskrnl/include/internal/ob.h b/reactos/ntoskrnl/include/internal/ob.h
index 176cb1df99f..1e21e1f0b12 100644
--- a/reactos/ntoskrnl/include/internal/ob.h
+++ b/reactos/ntoskrnl/include/internal/ob.h
@@ -9,7 +9,7 @@
 //
 // Define this if you want debugging support
 //
-#define _OB_DEBUG_                                      0x00
+#define _OB_DEBUG_                                      0x01
 
 //
 // These define the Debug Masks Supported
diff --git a/reactos/ntoskrnl/io/iomgr/iomgr.c b/reactos/ntoskrnl/io/iomgr/iomgr.c
index fae9d31c2ba..907dc8596b9 100644
--- a/reactos/ntoskrnl/io/iomgr/iomgr.c
+++ b/reactos/ntoskrnl/io/iomgr/iomgr.c
@@ -13,7 +13,7 @@
 #define NDEBUG
 #include <internal/debug.h>
 
-ULONG IopTraceLevel = 0; //IO_API_DEBUG | IO_FILE_DEBUG;
+ULONG IopTraceLevel = 0;
 
 // should go into a proper header
 VOID
diff --git a/reactos/ntoskrnl/ke/i386/trap.s b/reactos/ntoskrnl/ke/i386/trap.s
index f01225ab4f2..c29b0512e64 100644
--- a/reactos/ntoskrnl/ke/i386/trap.s
+++ b/reactos/ntoskrnl/ke/i386/trap.s
@@ -2379,3 +2379,31 @@ IsrTimeout:
     /* Cleanup verification */
     VERIFY_INT_END kid, 0
 .endfunc
+
+.globl _KeSynchronizeExecution@12
+.func KeSynchronizeExecution@12
+_KeSynchronizeExecution@12:
+
+    /* Save EBX and put the interrupt object in it */
+    push ebx
+    mov ebx, [esp+8]
+
+    /* Go to DIRQL */
+    mov cl, [ebx+KINTERRUPT_SYNCHRONIZE_IRQL]
+    call @KfRaiseIrql@4
+
+    /* Call the routine */
+    push eax
+    push [esp+20]
+    call [esp+20]
+
+    /* Lower IRQL */
+    mov ebx, eax
+    pop ecx
+    call @KfLowerIrql@4
+
+    /* Return status */
+    mov eax, ebx
+    pop ebx
+    ret 12
+.endfunc
diff --git a/reactos/ntoskrnl/ke/spinlock.c b/reactos/ntoskrnl/ke/spinlock.c
index 00a910b31f4..0b10ef07d14 100644
--- a/reactos/ntoskrnl/ke/spinlock.c
+++ b/reactos/ntoskrnl/ke/spinlock.c
@@ -247,31 +247,6 @@ KeAcquireInterruptSpinLock(IN PKINTERRUPT Interrupt)
     return OldIrql;
 }
 
-/*
- * @implemented
- */
-BOOLEAN
-NTAPI
-KeSynchronizeExecution(IN PKINTERRUPT Interrupt,
-                       IN PKSYNCHRONIZE_ROUTINE SynchronizeRoutine,
-                       IN PVOID SynchronizeContext)
-{
-    KIRQL OldIrql;
-    BOOLEAN Status;
-
-    /* Raise IRQL and acquire lock on MP */
-    OldIrql = KeAcquireInterruptSpinLock(Interrupt);
-
-    /* Call the routine */
-    Status = SynchronizeRoutine(SynchronizeContext);
-
-    /* Release lock and lower IRQL */
-    KeReleaseInterruptSpinLock(Interrupt, OldIrql);
-
-    /* Return routine status */
-    return Status;
-}
-
 /*
  * @implemented
  */
diff --git a/reactos/ntoskrnl/ob/obinit.c b/reactos/ntoskrnl/ob/obinit.c
index 89fb834189a..d248516a29c 100644
--- a/reactos/ntoskrnl/ob/obinit.c
+++ b/reactos/ntoskrnl/ob/obinit.c
@@ -44,7 +44,7 @@ GENERIC_MAPPING ObpSymbolicLinkMapping =
 };
 
 PDEVICE_MAP ObSystemDeviceMap = NULL;
-ULONG ObpTraceLevel = OB_HANDLE_DEBUG | OB_REFERENCE_DEBUG;
+ULONG ObpTraceLevel = 0;
 
 VOID
 NTAPI
diff --git a/reactos/ntoskrnl/ps/query.c b/reactos/ntoskrnl/ps/query.c
index c95de551bd2..6d5fbcb420f 100644
--- a/reactos/ntoskrnl/ps/query.c
+++ b/reactos/ntoskrnl/ps/query.c
@@ -17,7 +17,7 @@
 #include "internal/ps_i.h"
 
 /* Debugging Level */
-ULONG PspTraceLevel = 0;//PS_KILL_DEBUG | PS_REF_DEBUG;
+ULONG PspTraceLevel = 0;
 
 /* PRIVATE FUNCTIONS *********************************************************/