diff --git a/backend/src/api/handler.rs b/backend/src/api/handler.rs
index 5058eab..dfc065a 100644
--- a/backend/src/api/handler.rs
+++ b/backend/src/api/handler.rs
@@ -32,6 +32,30 @@ pub enum ApiMessage {
     UploadCurrentVariant(String, String), // SteamID, Steam username
 }
 
+impl core::fmt::Display for ApiMessage {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Battery(x) => write!(f, "Battery;{}", x),
+            Self::Cpu(x) => write!(f, "Cpu;{}", x),
+            Self::Gpu(x) => write!(f, "Gpu;{}", x),
+            Self::General(x) => write!(f, "General;{}", x),
+            Self::OnResume => write!(f, "OnResume"),
+            Self::OnPluggedIn => write!(f, "OnPluggedIn"),
+            Self::OnUnplugged => write!(f, "OnUnplugged"),
+            Self::OnChargeChange(x) => write!(f, "OnChargeChange({:?})", x),
+            Self::PowerVibeCheck => write!(f, "PowerVibeCheck"),
+            Self::WaitForEmptyQueue(_) => write!(f, "WaitForEmptyQueue"),
+            Self::LoadSettings(path, name, variant, variant_name) => write!(f, "LoadSettings({}, {}, {}, {})", path, name, variant, variant_name),
+            Self::LoadVariant(variant, variant_name) => write!(f, "LoadVariant({}, {})", variant, variant_name),
+            Self::LoadMainSettings => write!(f, "LoadMainSettings"),
+            Self::LoadSystemSettings => write!(f, "LoadSystemSettings"),
+            Self::GetLimits(_) => write!(f, "GetLimits"),
+            Self::GetProvider(s, _) => write!(f, "GetProvider({})", s),
+            Self::UploadCurrentVariant(id, user) => write!(f, "UploadCurrentVariant(id: {}, user: {})", id, user),
+        }
+    }
+}
+
 pub enum BatteryMessage {
     SetChargeRate(Option<u64>),
     GetChargeRate(Callback<Option<u64>>),
@@ -46,6 +70,24 @@ pub enum BatteryMessage {
     GetChargeLimit(Callback<Option<f64>>),
 }
 
+impl core::fmt::Display for BatteryMessage {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::SetChargeRate(x) => write!(f, "SetChargeRate({:?})", x),
+            Self::GetChargeRate(_) => write!(f, "GetChargeRate"),
+            Self::SetChargeMode(x) => write!(f, "SetChargeMode({:?})", x),
+            Self::GetChargeMode(_) => write!(f, "GetChargeMode"),
+            Self::ReadChargeFull(_) => write!(f, "ReadChargeFull"),
+            Self::ReadChargeNow(_) => write!(f, "ReadChargeNow"),
+            Self::ReadChargeDesign(_) => write!(f, "ReadChargeDesign"),
+            Self::ReadCurrentNow(_) => write!(f, "ReadCurrentNow"),
+            Self::ReadChargePower(_) => write!(f, "ReadChargePower"),
+            Self::SetChargeLimit(x) => write!(f, "SetChargeLimit({:?})", x),
+            Self::GetChargeLimit(_) => write!(f, "GetChargeLimit"),
+        }
+    }
+}
+
 impl BatteryMessage {
     fn process(self, settings: &mut dyn TBattery) -> bool {
         let dirty = self.is_modify();
@@ -87,6 +129,23 @@ pub enum CpuMessage {
     GetCpusGovernor(Callback<Vec<String>>),
 }
 
+impl core::fmt::Display for CpuMessage {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::SetCpuOnline(i, x) => write!(f, "SetCpuOnline({}, {})", i, x),
+            Self::SetCpusOnline(x) => write!(f, "SetCpusOnline({:?})", x),
+            Self::SetSmt(x, _) => write!(f, "SetChargeMode({})", x),
+            Self::GetSmt(_) => write!(f, "GetSmt"),
+            Self::GetCpusOnline(_) => write!(f, "GetCpusOnline"),
+            Self::SetClockLimits(x, y) => write!(f, "SetClockLimits({}, {:?})", x, y),
+            Self::GetClockLimits(x, _) => write!(f, "GetClockLimits({})", x),
+            Self::SetCpuGovernor(i, x) => write!(f, "SetCpuGovernor({}, {})", i, x),
+            Self::SetCpusGovernor(x) => write!(f, "SetCpusGovernor({:?})", x),
+            Self::GetCpusGovernor(_) => write!(f, "GetCpusGovernor"),
+        }
+    }
+}
+
 impl CpuMessage {
     fn process(self, settings: &mut dyn TCpus) -> bool {
         let dirty = self.is_modify();
@@ -206,6 +265,19 @@ pub enum GpuMessage {
     GetMemoryClock(Callback<Option<u64>>),
 }
 
+impl core::fmt::Display for GpuMessage {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::SetPpt(x, y) => write!(f, "SetPpt(fast {:?}, slow {:?})", x, y),
+            Self::GetPpt(_) => write!(f, "GetPpt"),
+            Self::SetClockLimits(x) => write!(f, "SetClockLimits({:?})", x),
+            Self::GetClockLimits(_) => write!(f, "GetClockLimits"),
+            Self::SetMemoryClock(x) => write!(f, "SetMemoryClock({:?})", x),
+            Self::GetMemoryClock(_) => write!(f, "GetMemoryClock"),
+        }
+    }
+}
+
 impl GpuMessage {
     fn process(self, settings: &mut dyn TGpu) -> bool {
         let dirty = self.is_modify();
@@ -242,6 +314,21 @@ pub enum GeneralMessage {
     ApplyNow,
 }
 
+impl core::fmt::Display for GeneralMessage {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::SetPersistent(x) => write!(f, "SetPersistent({})", x),
+            Self::GetPersistent(_) => write!(f, "GetPersistent"),
+            Self::GetCurrentProfileName(_) => write!(f, "GetCurrentProfileName"),
+            Self::GetPath(_) => write!(f, "GetPath"),
+            Self::GetCurrentVariant(_) => write!(f, "GetCurrentVariant"),
+            Self::GetAllVariants(_) => write!(f, "GetAllVariants"),
+            Self::AddVariant(variant, _) => write!(f, "AddVariant(name: `{}` [...])", variant.name),
+            Self::ApplyNow => write!(f, "ApplyNow"),
+        }
+    }
+}
+
 impl GeneralMessage {
     fn process(self, settings: &mut dyn TGeneral) -> bool {
         let dirty = self.is_modify();
@@ -285,20 +372,31 @@ fn print_errors(call_name: &str, errors: Vec<crate::settings::SettingError>) {
     log::error!("Settings {}() err:\n{}", call_name, err_list);
 }
 
+fn print_messages(msgs: &Vec<String>) {
+    let mut log_msg = String::new();
+    for msg in msgs.iter() {
+        //use core::fmt::Write;
+        write!(log_msg, "{}, ", msg).unwrap();
+    }
+    log::info!("Processed messages: [{}]", log_msg);
+}
+
 impl ApiMessageHandler {
     pub fn process_forever(&mut self, settings: &mut Settings) {
         crate::utility::ioperm_power_ec();
         //let mut dirty_echo = true; // set everything twice, to make sure PowerTools wins on race conditions
         while let Ok(msg) = self.intake.recv() {
+            let mut messages = vec![msg.to_string()]; // keep messages for logging
             let mut dirty = self.process(settings, msg);
             while let Ok(msg) = self.intake.try_recv() {
+                messages.push(msg.to_string());
                 dirty |= self.process(settings, msg);
             }
             if dirty
             /*|| dirty_echo */
             {
                 //dirty_echo = dirty; // echo only once
-
+                print_messages(&messages);
                 // run on_set
                 if let Err(e) = settings.on_set() {
                     print_errors("on_set", e);