diff --git a/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp b/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp
index 2dd05f5..5a74a42 100644
--- a/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp
@@ -35,12 +35,10 @@
 MultiTouchInputMapper::~MultiTouchInputMapper() {}
 
 std::list<NotifyArgs> MultiTouchInputMapper::reset(nsecs_t when) {
-    // The evdev multi-touch protocol does not allow userspace applications to query the initial or
-    // current state of the pointers at any time. This means if we clear our accumulated state when
-    // resetting the input mapper, there's no way to rebuild the full initial state of the pointers.
-    // We can only wait for updates to all the pointers and axes. Rather than clearing the state and
-    // rebuilding the state from scratch, we work around this kernel API limitation by never
-    // fully clearing any state specific to the multi-touch protocol.
+    // TODO(b/291626046): Sync the MT state with the kernel using EVIOCGMTSLOTS.
+    mMultiTouchMotionAccumulator.reset(getDeviceContext());
+    mPointerIdBits.clear();
+
     return TouchInputMapper::reset(when);
 }
 
diff --git a/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.cpp b/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.cpp
index b0fc903..d06514a 100644
--- a/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.cpp
+++ b/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.cpp
@@ -30,23 +30,29 @@
                                             size_t slotCount, bool usingSlotsProtocol) {
     mUsingSlotsProtocol = usingSlotsProtocol;
     mSlots = std::vector<Slot>(slotCount);
+    reset(deviceContext);
+}
 
-    mCurrentSlot = -1;
-    if (mUsingSlotsProtocol) {
-        // Query the driver for the current slot index and use it as the initial slot before we
-        // start reading events from the device.  It is possible that the current slot index will
-        // not be the same as it was when the first event was written into the evdev buffer, which
-        // means the input mapper could start out of sync with the initial state of the events in
-        // the evdev buffer. In the extremely unlikely case that this happens, the data from two
-        // slots will be confused until the next ABS_MT_SLOT event is received. This can cause the
-        // touch point to "jump", but at least there will be no stuck touches.
-        int32_t initialSlot;
-        if (const auto status = deviceContext.getAbsoluteAxisValue(ABS_MT_SLOT, &initialSlot);
-            status == OK) {
-            mCurrentSlot = initialSlot;
-        } else {
-            ALOGD("Could not retrieve current multi-touch slot index. status=%d", status);
-        }
+void MultiTouchMotionAccumulator::reset(const InputDeviceContext& deviceContext) {
+    resetSlots();
+
+    if (!mUsingSlotsProtocol) {
+        return;
+    }
+
+    // Query the driver for the current slot index and use it as the initial slot before we
+    // start reading events from the device.  It is possible that the current slot index will
+    // not be the same as it was when the first event was written into the evdev buffer, which
+    // means the input mapper could start out of sync with the initial state of the events in
+    // the evdev buffer. In the extremely unlikely case that this happens, the data from two
+    // slots will be confused until the next ABS_MT_SLOT event is received. This can cause the
+    // touch point to "jump", but at least there will be no stuck touches.
+    int32_t initialSlot;
+    if (const auto status = deviceContext.getAbsoluteAxisValue(ABS_MT_SLOT, &initialSlot);
+        status == OK) {
+        mCurrentSlot = initialSlot;
+    } else {
+        ALOGD("Could not retrieve current multi-touch slot index. status=%d", status);
     }
 }
 
diff --git a/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.h b/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.h
index 0e3e2bb..5b55e3d 100644
--- a/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.h
+++ b/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.h
@@ -83,6 +83,7 @@
         LOG_ALWAYS_FATAL_IF(index < 0 || index >= mSlots.size(), "Invalid index: %zu", index);
         return mSlots[index];
     }
+    void reset(const InputDeviceContext& deviceContext);
 
 private:
     int32_t mCurrentSlot;