diff --git a/Makefile b/Makefile
index b4324ad..2c557d7 100755
--- a/Makefile
+++ b/Makefile
@@ -1037,7 +1037,7 @@ SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ | sed -e s/aarch64/arm64/ )
 ARCH ?= $(SUBARCH)
 CROSS_COMPILE ?=
 KVER := $(shell uname -r)
-KSRC := /lib/modules/$(KVER)/build
+KSRC ?= /lib/modules/$(KVER)/build
 MODDESTDIR := /lib/modules/$(KVER)/kernel/drivers/net/wireless/
 INSTALL_PREFIX :=
 STAGINGMODDIR := /lib/modules/$(KVER)/kernel/drivers/staging
diff --git a/README.md b/README.md
index c0a632d..7839c69 100644
--- a/README.md
+++ b/README.md
@@ -1,25 +1,25 @@
-# RTL8812AU/21AU and RTL8814AU drivers
-# with monitor mode and frame injection
+## RTL8812AU/21AU and RTL8814AU drivers
+## with monitor mode and frame injection
 
-## DKMS
+### DKMS
 This driver can be installed using [DKMS]. This is a system which will automatically recompile and install a kernel module when a new kernel gets installed or updated. To make use of DKMS, install the `dkms` package, which on Debian (based) systems is done like this:
 ```
 sudo apt install dkms
 ```
 
-## Installation of Driver
+### Installation of Driver
 In order to install the driver open a terminal in the directory with the source code and execute the following command:
 ```
 sudo ./dkms-install.sh
 ```
 
-## Removal of Driver
+### Removal of Driver
 In order to remove the driver from your system open a terminal in the directory with the source code and execute the following command:
 ```
 sudo ./dkms-remove.sh
 ```
 
-## Make
+### Make
 For building & installing the rtl8812au/rtl8821au driver with 'make' use
 ```
 make
@@ -31,7 +31,7 @@ make RTL8814=1
 make install RTL8814=1
 ```
 
-## Notes
+### Notes
 Download
 ```
 git clone -b v5.2.20 https://github.com/aircrack-ng/rtl8812au.git
@@ -72,15 +72,36 @@ For setting TX power
 sudo iw wlan0 set txpower fixed 3000
 ```
 
-## LED Parameter
-```
-We've added the "realtek-leds.conf" in build directory, 
-with this you may change the leds to 
-"2: Allways On", "1: Normal" or "0: Allways Off" with placing the file in "/etc/modprobe.d/
+### LED control
 
-Manual modprobe will override this file if option value also included at the command line, e.g.,
-$ sudo modprobe -r 8812au
-$ sudo modprobe 8812au rtw_led_ctrl=1
+#### You can now control LED behaviour statically by Makefile, for example:
+
+```sh
+CONFIG_LED_ENABLE = n
+```
+value can be y or n
+
+#### statically by module parameter in /etc/modprobe.d/8812au.conf or wherever, for example:
+
+```sh
+options 8812au rtw_led_enable=0
+```
+value can be 0 or 1
+
+#### or dynamically by writing to /proc/net/rtl8812au/$(your interface name)/led_enable, for example:
+
+```sh
+$ echo "0" > /proc/net/rtl8812au/$(your interface name)/led_enable
+```
+value can be 0 or 1
+
+#### check current value:
+
+```sh
+$ cat /proc/net/rtl8812au/$(your interface name)/led_enable
+```
+
+### NetworkManager
 
 Newer versions of NetworkManager switches to random MAC address. Some users would prefer to use a fixed address. 
 Simply add these lines below
diff --git a/hal/rtl8814a/rtl8814a_hal_init.c b/hal/rtl8814a/rtl8814a_hal_init.c
index c026546..6c2f471 100644
--- a/hal/rtl8814a/rtl8814a_hal_init.c
+++ b/hal/rtl8814a/rtl8814a_hal_init.c
@@ -6535,7 +6535,7 @@ u8 GetHalDefVar8814A(PADAPTER padapter, HAL_DEF_VARIABLE variable, void *pval)
 			break;
 
 		case HAL_DEF_RX_STBC:
-			*(u8*)pval = 1;
+			*(u8*)pval = 4;
 			break;
 
 		case HAL_DEF_EXPLICIT_BEAMFORMER:
diff --git a/hal/rtl8814a/usb/usb_halinit.c b/hal/rtl8814a/usb/usb_halinit.c
index a9c7e71..15c21ea 100644
--- a/hal/rtl8814a/usb/usb_halinit.c
+++ b/hal/rtl8814a/usb/usb_halinit.c
@@ -2004,16 +2004,14 @@ hal_ReadUsbModeSwitch_8814AU(
 	IN	BOOLEAN		AutoloadFail
 	)
 {
-#if 0
-	if(AutoloadFail)
-	{
-		UsbModeSwitch_SetUsbModeMechOn(Adapter, _FALSE);
-	}
+
+  	HAL_DATA_TYPE *pHalData = GET_HAL_DATA(Adapter);
+
+	if (AutoloadFail)
+		pHalData->EEPROMUsbSwitch = _FALSE;
 	else
-	{
-		UsbModeSwitch_SetUsbModeMechOn(Adapter, ((PROMContent[8]&BIT1)>>1));
-	}
-#endif
+		/* check efuse 0x0E bit2 */
+		pHalData->EEPROMUsbSwitch = (PROMContent[EEPROM_USB_MODE_8814A] & BIT1) >> 1;
 }
 
 static VOID
diff --git a/os_dep/linux/ioctl_cfg80211.c b/os_dep/linux/ioctl_cfg80211.c
index 0f0adc9..156aa2c 100644
--- a/os_dep/linux/ioctl_cfg80211.c
+++ b/os_dep/linux/ioctl_cfg80211.c
@@ -4162,6 +4162,11 @@ static int rtw_cfg80211_add_monitor_if(_adapter *padapter, char *name, struct ne
 	mon_ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 	strncpy(mon_ndev->name, name, IFNAMSIZ);
 	mon_ndev->name[IFNAMSIZ - 1] = 0;
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12 ,0))
+	mon_ndev->needs_free_netdev = true;
+#else
+	mon_ndev->destructor = rtw_ndev_destructor;
+#endif
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(4, 11, 8))
 	mon_ndev->priv_destructor = rtw_ndev_destructor;
 #else