diff -r 99ac58eee195 -r 5371d84c7ef2 src/dev/mc146818.hh
--- a/src/dev/mc146818.hh	Thu Dec 04 11:08:23 2014 -0700
+++ b/src/dev/mc146818.hh	Thu Dec 04 11:08:23 2014 -0700
@@ -51,6 +51,7 @@
     {
         MC146818 * parent;
         Tick interval;
+        Tick offset;
 
         RTCEvent(MC146818 * _parent, Tick i);
 
@@ -68,11 +69,11 @@
     struct RTCTickEvent : public Event
     {
         MC146818 * parent;
+        Tick offset;
 
-        RTCTickEvent(MC146818 * _parent) : parent(_parent)
-        {
-            parent->schedule(this, curTick() + SimClock::Int::s);
-        }
+        RTCTickEvent(MC146818 * _parent) :
+            parent(_parent), offset(SimClock::Int::s)
+        {}
 
         /** Event process to occur at interrupt*/
         void process();
@@ -153,6 +154,9 @@
             bool bcd, Tick frequency);
     virtual ~MC146818();
 
+    /** Start ticking */
+    virtual void startup();
+
     /** RTC write data */
     void writeData(const uint8_t addr, const uint8_t data);
 
diff -r 99ac58eee195 -r 5371d84c7ef2 src/dev/mc146818.cc
--- a/src/dev/mc146818.cc	Thu Dec 04 11:08:23 2014 -0700
+++ b/src/dev/mc146818.cc	Thu Dec 04 11:08:23 2014 -0700
@@ -123,6 +123,15 @@
 }
 
 void
+MC146818::startup()
+{
+    assert(!event.scheduled());
+    assert(!tickEvent.scheduled());
+    schedule(event, curTick() + event.offset);
+    schedule(tickEvent, curTick() + tickEvent.offset);
+}
+
+void
 MC146818::writeData(const uint8_t addr, const uint8_t data)
 {
     bool panic_unsupported(false);
@@ -291,17 +300,16 @@
     //
     Tick rtcTimerInterruptTickOffset;
     UNSERIALIZE_SCALAR(rtcTimerInterruptTickOffset);
-    reschedule(event, curTick() + rtcTimerInterruptTickOffset);
+    event.offset = rtcTimerInterruptTickOffset;
     Tick rtcClockTickOffset;
     UNSERIALIZE_SCALAR(rtcClockTickOffset);
-    reschedule(tickEvent, curTick() + rtcClockTickOffset);
+    tickEvent.offset = rtcClockTickOffset;
 }
 
 MC146818::RTCEvent::RTCEvent(MC146818 * _parent, Tick i)
-    : parent(_parent), interval(i)
+    : parent(_parent), interval(i), offset(i)
 {
     DPRINTF(MC146818, "RTC Event Initilizing\n");
-    parent->schedule(this, curTick() + interval);
 }
 
 void

diff -r 99ac58eee195 -r 5371d84c7ef2 src/dev/x86/cmos.hh
--- a/src/dev/x86/cmos.hh	Thu Dec 04 11:08:23 2014 -0700
+++ b/src/dev/x86/cmos.hh	Thu Dec 04 11:08:23 2014 -0700
@@ -82,6 +82,7 @@
 
     Tick write(PacketPtr pkt);
 
+    virtual void startup();
     virtual void serialize(std::ostream &os);
     virtual void unserialize(Checkpoint *cp, const std::string &section);
 
diff -r 99ac58eee195 -r 5371d84c7ef2 src/dev/x86/cmos.cc
--- a/src/dev/x86/cmos.cc	Thu Dec 04 11:08:23 2014 -0700
+++ b/src/dev/x86/cmos.cc	Thu Dec 04 11:08:23 2014 -0700
@@ -113,6 +113,12 @@
 }
 
 void
+X86ISA::Cmos::startup()
+{
+    rtc.startup();
+}
+
+void
 X86ISA::Cmos::serialize(std::ostream &os)
 {
     SERIALIZE_SCALAR(address);