diff --git a/hal/phydm/phydm_adc_sampling.c b/hal/phydm/phydm_adc_sampling.c
index ea9d0c0..d227856 100644
--- a/hal/phydm/phydm_adc_sampling.c
+++ b/hal/phydm/phydm_adc_sampling.c
@@ -1075,7 +1075,7 @@ void phydm_la_set_buff_mode(void *dm_void, enum la_buff_mode mode)
 		end_pos_tmp = 0x8000;
 		break;
 	default:
-		pr_debug("[%s] Warning!", __func__);
+		//pr_debug("[%s] Warning!", __func__);
 		break;
 	}
 
diff --git a/os_dep/linux/os_intfs.c b/os_dep/linux/os_intfs.c
index 293d88c..ef370be 100644
--- a/os_dep/linux/os_intfs.c
+++ b/os_dep/linux/os_intfs.c
@@ -39,7 +39,7 @@ int rtw_vrtl_carrier_sense = AUTO_VCS;
 int rtw_vcs_type = RTS_CTS;
 int rtw_rts_thresh = 2347;
 int rtw_frag_thresh = 2346;
-int rtw_preamble = PREAMBLE_LONG;/* long, short, auto */
+int rtw_preamble = PREAMBLE_AUTO;/* long, short, auto */
 int rtw_scan_mode = 1;/* active, passive */
 /* int smart_ps = 1; */
 #ifdef CONFIG_POWER_SAVING
@@ -84,22 +84,22 @@ MODULE_PARM_DESC(rtw_lps_level, "The default LPS level");
 
 module_param(rtw_lps_chk_by_tp, int, 0644);
 
-/* LPS: 
+/* LPS:
  * rtw_smart_ps = 0 => TX: pwr bit = 1, RX: PS_Poll
  * rtw_smart_ps = 1 => TX: pwr bit = 0, RX: PS_Poll
  * rtw_smart_ps = 2 => TX: pwr bit = 0, RX: NullData with pwr bit = 0
 */
-int rtw_smart_ps = 2;
+int rtw_smart_ps = 0;
 
 int rtw_max_bss_cnt = 0;
 module_param(rtw_max_bss_cnt, int, 0644);
-#ifdef CONFIG_WMMPS_STA	
-/* WMMPS: 
+#ifdef CONFIG_WMMPS_STA
+/* WMMPS:
  * rtw_smart_ps = 0 => Only for fw test
  * rtw_smart_ps = 1 => Refer to Beacon's TIM Bitmap
  * rtw_smart_ps = 2 => Don't refer to Beacon's TIM Bitmap
 */
-int rtw_wmm_smart_ps = 2;
+int rtw_wmm_smart_ps = 1;
 #endif /* CONFIG_WMMPS_STA */
 
 int rtw_check_fw_ps = 1;
@@ -292,7 +292,7 @@ But Softap must be SHUT DOWN once P2P decide to set up connection and become a G
 #endif
 
 #ifdef CONFIG_BT_COEXIST
-int rtw_btcoex_enable = 2;
+int rtw_btcoex_enable = 0;
 module_param(rtw_btcoex_enable, int, 0644);
 MODULE_PARM_DESC(rtw_btcoex_enable, "BT co-existence on/off, 0:off, 1:on, 2:by efuse");