diff --git a/supervisor/docker/__init__.py b/supervisor/docker/__init__.py
index 4c1bc984d..471f77f20 100644
--- a/supervisor/docker/__init__.py
+++ b/supervisor/docker/__init__.py
@@ -61,7 +61,7 @@ class DockerInfo:
     @property
     def support_cpu_realtime(self) -> bool:
         """Return true, if CONFIG_RT_GROUP_SCHED is loaded."""
-        if not Path("/sys/fs/cgroup/cpu.rt_runtime_us").exists():
+        if not Path("/sys/fs/cgroup/cpu/cpu.rt_runtime_us").exists():
             return False
         return bool(os.environ.get(ENV_SUPERVISOR_CPU_RT, 0))
 
diff --git a/supervisor/docker/addon.py b/supervisor/docker/addon.py
index 927799e25..4f33fee59 100644
--- a/supervisor/docker/addon.py
+++ b/supervisor/docker/addon.py
@@ -265,8 +265,12 @@ class DockerAddon(DockerInterface):
         limits: List[docker.types.Ulimit] = []
 
         # Need schedule functions
-        if self.addon.with_realtime and self.sys_docker.info.support_cpu_realtime:
-            limits.append(docker.types.Ulimit(name="rtprio", soft=99))
+        if self.addon.with_realtime:
+            limits.append(docker.types.Ulimit(name="rtprio", soft=90, hard=99))
+
+            # Set available memory for memlock to 128MB
+            mem = 128 * 1024 * 1024
+            limits.append(docker.types.Ulimit(name="memlock", soft=mem, hard=mem))
 
         # Return None if no capabilities is present
         if limits:
diff --git a/supervisor/docker/audio.py b/supervisor/docker/audio.py
index 2f9a27454..a7e5198ee 100644
--- a/supervisor/docker/audio.py
+++ b/supervisor/docker/audio.py
@@ -59,9 +59,8 @@ class DockerAudio(DockerInterface, CoreSysAttributes):
     @property
     def ulimits(self) -> List[docker.types.Ulimit]:
         """Generate ulimits for audio."""
-        if not self.sys_docker.info.support_cpu_realtime:
-            return None
-        return [docker.types.Ulimit(name="rtprio", soft=99)]
+        # Pulseaudio by default tries to use real-time scheduling with priority of 5.
+        return [docker.types.Ulimit(name="rtprio", soft=10, hard=10)]
 
     @property
     def cpu_rt_runtime(self) -> Optional[int]: