diff --git a/libs/scrap/src/common/hwcodec.rs b/libs/scrap/src/common/hwcodec.rs
index c77da3f8f..55c2309b5 100644
--- a/libs/scrap/src/common/hwcodec.rs
+++ b/libs/scrap/src/common/hwcodec.rs
@@ -190,22 +190,28 @@ impl HwDecoder {
     }
 
     pub fn new_decoders() -> HwDecoders {
+        flog("enter new_decoders");
         let best = HwDecoder::best();
+        flog(&format!("best:${:?}", best));
         let mut h264: Option<HwDecoder> = None;
         let mut h265: Option<HwDecoder> = None;
         let mut fail = false;
 
         if let Some(info) = best.h264 {
+            flog(&format!("before new h264 codec"));
             h264 = HwDecoder::new(info).ok();
             if h264.is_none() {
                 fail = true;
             }
+            flog(&format!("new h264 codec result:{:}", h264.is_some()));
         }
         if let Some(info) = best.h265 {
+            flog(&format!("before new h265 codec"));
             h265 = HwDecoder::new(info).ok();
             if h265.is_none() {
                 fail = true;
             }
+            flog(&format!("new h265 codec result:{:}", h265.is_some()));
         }
         if fail {
             check_config_process(true);
@@ -322,11 +328,21 @@ pub fn check_config_process(force_reset: bool) {
     }
     if let Ok(exe) = std::env::current_exe() {
         std::thread::spawn(move || {
-            std::process::Command::new(exe)
+            let result = std::process::Command::new(exe)
                 .arg("--check-hwcodec-config")
                 .status()
                 .ok();
+            flog(&format!("check codec process run result:{:?}", result));
             HwCodecConfig::refresh();
         });
     };
 }
+
+pub fn flog(s: &str) {
+    use hbb_common::chrono::prelude::*;
+    use std::io::Write;
+    let mut option = std::fs::OpenOptions::new();
+    if let Ok(mut f) = option.append(true).create(true).open("/tmp/log.txt") {
+        write!(&mut f, "{:?} {}\n", Local::now(), s).ok();
+    }
+}