2 files changed, 12 insertions, 6 deletions
diff --git a/apex/jobscheduler/service/java/com/android/server/alarm/AlarmManagerService.java b/apex/jobscheduler/service/java/com/android/server/alarm/AlarmManagerService.java
index dfa72069c28a..ee03e4b2ccd1 100644
--- a/apex/jobscheduler/service/java/com/android/server/alarm/AlarmManagerService.java
+++ b/apex/jobscheduler/service/java/com/android/server/alarm/AlarmManagerService.java
@@ -120,6 +120,7 @@ import android.os.SystemProperties;
 import android.os.ThreadLocalWorkSource;
 import android.os.Trace;
 import android.os.UserHandle;
+import android.os.UserManager;
 import android.os.WorkSource;
 import android.provider.DeviceConfig;
 import android.provider.Settings;
@@ -1794,7 +1795,8 @@ public class AlarmManagerService extends SystemService {
         mActivityManagerInternal = LocalServices.getService(ActivityManagerInternal.class);
 
         mUseFrozenStateToDropListenerAlarms = Flags.useFrozenStateToDropListenerAlarms();
-        mStartUserBeforeScheduledAlarms = Flags.startUserBeforeScheduledAlarms();
+        mStartUserBeforeScheduledAlarms = Flags.startUserBeforeScheduledAlarms()
+                && UserManager.supportsMultipleUsers();
         if (mStartUserBeforeScheduledAlarms) {
             mUserWakeupStore = new UserWakeupStore();
             mUserWakeupStore.init();
@@ -3015,7 +3017,7 @@ public class AlarmManagerService extends SystemService {
                     mUseFrozenStateToDropListenerAlarms);
             pw.println();
             pw.print(Flags.FLAG_START_USER_BEFORE_SCHEDULED_ALARMS,
-                    mStartUserBeforeScheduledAlarms);
+                    Flags.startUserBeforeScheduledAlarms());
             pw.decreaseIndent();
             pw.println();
             pw.println();
diff --git a/apex/jobscheduler/service/java/com/android/server/alarm/UserWakeupStore.java b/apex/jobscheduler/service/java/com/android/server/alarm/UserWakeupStore.java
index dc5e3414a819..93904a773ed5 100644
--- a/apex/jobscheduler/service/java/com/android/server/alarm/UserWakeupStore.java
+++ b/apex/jobscheduler/service/java/com/android/server/alarm/UserWakeupStore.java
@@ -20,6 +20,7 @@ package com.android.server.alarm;
 import android.annotation.Nullable;
 import android.os.Environment;
 import android.os.SystemClock;
+import android.os.UserHandle;
 import android.util.AtomicFile;
 import android.util.IndentingPrintWriter;
 import android.util.Pair;
@@ -113,15 +114,18 @@ public class UserWakeupStore {
     }
 
     /**
-     * Add user wakeup for the alarm.
+     * Add user wakeup for the alarm if needed.
      * @param userId Id of the user that scheduled alarm.
      * @param alarmTime time when alarm is expected to trigger.
      */
     public void addUserWakeup(int userId, long alarmTime) {
-        synchronized (mUserWakeupLock) {
-            mUserStarts.put(userId, alarmTime - BUFFER_TIME_MS + getUserWakeupOffset());
+        // SYSTEM user is always running, so no need to schedule wakeup for it.
+        if (userId != UserHandle.USER_SYSTEM) {
+            synchronized (mUserWakeupLock) {
+                mUserStarts.put(userId, alarmTime - BUFFER_TIME_MS + getUserWakeupOffset());
+            }
+            updateUserListFile();
         }
-        updateUserListFile();
     }
 
     /**