Add logic to adjust minPWM on fan stop

app/src/App.cxx

@@ -5,10 +5,10 @@
 using namespace std;
 
 void App::Init() {
-  auto fans = mSerializer.DeserializeFans(mSensorManager.RPMSensors());
+  mFans = mSerializer.DeserializeFans(mSensorManager.RPMSensors());
 
   auto fanCurves = mSerializer.DeserializeFanCurves(
-      mSensorManager.TemperatureSensors(), fans);
+      mSensorManager.TemperatureSensors(), mFans);
 
   mController = make_unique<Controller>(fanCurves);
 }
@@ -23,6 +23,8 @@ void App::InitialSetup() {
   mFanLabeler.RunFanLabelInteraction(fans);
 
   mSerializer.SerializeFans(fans);
+
+  mFans = fans;
 }
 
 void App::NormalOperation() {
@@ -30,4 +32,7 @@ void App::NormalOperation() {
     mController->StartFanControlLoop();
 }
 
-void App::Shutdown() { mController.reset(); }
+void App::Shutdown() {
+  mController.reset();
+  mSerializer.SerializeFans(mFans);
+}

app/src/fan/FanCurve.cxx

@@ -16,6 +16,7 @@ FanCurve::FanCurve(std::vector<FanStep> steps,
 
 void FanCurve::DoFanControl() {
   BOOST_LOG_FUNCTION();
+
   int temp = AggregateTemperature();
 
   int t0, t1, p0, p1;
@@ -43,8 +44,12 @@ void FanCurve::DoFanControl() {
     if (f->RPM() <= 0) {
       BOOST_LOG_TRIVIAL(warning) << "Fan stopped completely!";
       f->PWM(f->StartPWM());
+
+      BOOST_LOG_TRIVIAL(info) << "Adjusting minPWM of fan " << f->toString();
+      f->MinPWM(f->MinPWM() + 2);
+    } else {
+      f->PWM(targetFanPower);
     }
-    f->PWM(targetFanPower);
   }
 }
 

app/src/fan/HwmonFan.cxx

@@ -47,9 +47,7 @@ void HwmonFan::FindPWMLimits() {
     PWM(curPWM);
     this_thread::sleep_for(chrono::seconds(TIMEOUT));
 
-    int curRPM = RPM();
-
-    if (curRPM <= 0) {
+    if (RPM() <= 0) {
       minPWM = curPWM + 5;
       break;
     }
@@ -68,9 +66,7 @@ void HwmonFan::FindPWMLimits() {
       PWM(curPWM);
       this_thread::sleep_for(chrono::seconds(TIMEOUT));
 
-      int curRPM = RPM();
-
-      if (curRPM > 0) {
+      if (RPM() > 0) {
         cout << "Setting start PWM: " << startPWM << endl;
         startPWM = curPWM;
         break;