diff --git a/apps/setmod3.c b/apps/setmod3.c
index ed3a6f2..302cb09 100644
--- a/apps/setmod3.c
+++ b/apps/setmod3.c
@@ -63,12 +63,18 @@ int main()
 	/* gain 0-255 */
 	get_property(fd, MODULATOR_GAIN, &data);
 	printf("Modulator gain = %u\n", data);
-	set_property(fd, MODULATOR_GAIN, 120);
+	set_property(fd, MODULATOR_GAIN, 100);
+
 	get_property(fd, MODULATOR_GAIN, &data);
 	printf("Modulator gain = %u\n", data);
 
+	get_property(fd, MODULATOR_ATTENUATOR, &data);
+	printf("Modulator attenuator = %u\n", data);
+
+	
 	get_property(fd, MODULATOR_STATUS, &data);
 	printf("Modulator status = %u\n", data);
+	set_property(fd, MODULATOR_STATUS, 2);
 	
 	
 	//set_property(fd, MODULATOR_RESET, 0);
diff --git a/ddbridge/ddbridge-core.c b/ddbridge/ddbridge-core.c
index 27adc79..2517636 100644
--- a/ddbridge/ddbridge-core.c
+++ b/ddbridge/ddbridge-core.c
@@ -4341,6 +4341,7 @@ static int ddb_init_boards(struct ddb *dev)
 int ddb_init(struct ddb *dev)
 {
 	mutex_init(&dev->link[0].flash_mutex);
+	mutex_init(&dev->ioctl_mutex);
 	if (no_init) {
 		ddb_device_create(dev);
 		return 0;
diff --git a/ddbridge/ddbridge-hw.c b/ddbridge/ddbridge-hw.c
index 0ddddb6..739b1d9 100644
--- a/ddbridge/ddbridge-hw.c
+++ b/ddbridge/ddbridge-hw.c
@@ -437,6 +437,7 @@ static const struct ddb_info ddb_mod_fsm_24 = {
 	.port_num = 24,
 	.temp_num = 1,
 	.tempmon_irq = 8,
+	.lostlock_irq = 9,
 };
 
 static const struct ddb_info ddb_mod_fsm_16 = {
@@ -447,6 +448,7 @@ static const struct ddb_info ddb_mod_fsm_16 = {
 	.port_num = 16,
 	.temp_num = 1,
 	.tempmon_irq = 8,
+	.lostlock_irq = 9,
 };
 
 static const struct ddb_info ddb_mod_fsm_8 = {
@@ -457,6 +459,7 @@ static const struct ddb_info ddb_mod_fsm_8 = {
 	.port_num = 8,
 	.temp_num = 1,
 	.tempmon_irq = 8,
+	.lostlock_irq = 9,
 };
 
 static const struct ddb_info ddb_mod_fsm_4 = {
@@ -467,6 +470,7 @@ static const struct ddb_info ddb_mod_fsm_4 = {
 	.port_num = 4,
 	.temp_num = 1,
 	.tempmon_irq = 8,
+	.lostlock_irq = 9,
 };
 
 static const struct ddb_info ddb_sdr = {
diff --git a/ddbridge/ddbridge-modulator.c b/ddbridge/ddbridge-modulator.c
index a453895..93c6162 100644
--- a/ddbridge/ddbridge-modulator.c
+++ b/ddbridge/ddbridge-modulator.c
@@ -434,6 +434,16 @@ static u32 max2871_sdr[6] = {
 	0x007A8098, 0x600080C9, 0x510061C2, 0x010000CB, 0x6199003C, 0x60440005
 };
 
+static void lostlock_handler(unsigned long data)
+{
+	struct ddb *dev = (struct ddb *)data;
+
+	dev_err(dev->dev, "Lost PLL lock!\n");
+	ddbwritel(dev, 0, RF_VGA);
+	udelay(10);
+	ddbwritel(dev, 31, RF_ATTENUATOR);
+}
+
 static int mod_setup_max2871(struct ddb *dev, u32 *reg)
 {
 	int status = 0;
@@ -467,6 +477,12 @@ static int mod_setup_max2871(struct ddb *dev, u32 *reg)
 		ddbwritel(dev,
 			  MAX2871_CONTROL_CE | MAX2871_CONTROL_LOSTLOCK,
 			  MAX2871_CONTROL);
+		if (dev->link[0].info->lostlock_irq) {
+			dev->handler_data[0][dev->link[0].info->lostlock_irq] =
+				(unsigned long)dev;
+			dev->handler[0][dev->link[0].info->lostlock_irq] =
+				lostlock_handler;
+		}
 	}
 	return status;
 }
@@ -1536,6 +1552,17 @@ static int mod_prop_proc(struct ddb_mod *mod, struct dtv_property *tvp)
 		if (mod->port->dev->link[0].info->version == 2)
 			return mod_fsm_setup(mod->port->dev,0 );
 		return -EINVAL;
+
+	case MODULATOR_STATUS:
+		if (mod->port->dev->link[0].info->version != 2)
+			return -EINVAL;
+		if (tvp->u.data & 2)
+			ddbwritel(mod->port->dev,
+				  MAX2871_CONTROL_CE |
+				  MAX2871_CONTROL_LOSTLOCK |
+				  MAX2871_CONTROL_ENABLE_LOSTLOCK_EVENT,
+				  MAX2871_CONTROL);
+		return 0;
 	}
 	return 0;
 }
@@ -1560,8 +1587,6 @@ static int mod_prop_get(struct ddb_mod *mod, struct dtv_property *tvp)
 		u32 status = 0, val;
 
 		val = ddbreadl(dev, MAX2871_CONTROL);
-		if (!(val & MAX2871_CONTROL_LOCK))
-			status |= 1;
 		if (!(val & MAX2871_CONTROL_LOCK))
 			status |= 1;
 		if (val & MAX2871_CONTROL_LOSTLOCK)
@@ -1571,6 +1596,9 @@ static int mod_prop_get(struct ddb_mod *mod, struct dtv_property *tvp)
 		val = ddbreadl(dev, TEMPMON_CONTROL);
 		if (val & TEMPMON_CONTROL_OVERTEMP)
 			status |= 4;
+		val = ddbreadl(dev, HARDWARE_VERSION);
+		if (val == 0xffffffff)
+			status |= 8;
 		tvp->u.data = status;
 		return 0;
 	}
@@ -1592,13 +1620,18 @@ int ddbridge_mod_do_ioctl(struct file *file, unsigned int cmd, void *parg)
 
 	if (dev->link[0].info->version == 3 && cmd != FE_SET_PROPERTY)
 		return -EINVAL;
+	mutex_lock(&dev->ioctl_mutex);
 	switch (cmd) {
 	case FE_SET_PROPERTY:
-		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
-			return -EINVAL;
+		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) {
+			ret = -EINVAL;
+			break;
+		}
 		tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
-		if (IS_ERR(tvp))
-			return PTR_ERR(tvp);
+		if (IS_ERR(tvp)) {
+			ret = PTR_ERR(tvp);
+			break;
+		}
 		for (i = 0; i < tvps->num; i++) {
 			ret = mod_prop_proc(mod, tvp + i);
 			if (ret < 0)
@@ -1606,14 +1639,18 @@ int ddbridge_mod_do_ioctl(struct file *file, unsigned int cmd, void *parg)
 			(tvp + i)->result = ret;
 		}
 		kfree(tvp);
-		return ret;
+		break;
 
 	case FE_GET_PROPERTY:
-		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
-			return -EINVAL;
+		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) {
+			ret = -EINVAL;
+			break;
+		}
 		tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
-		if (IS_ERR(tvp))
-			return PTR_ERR(tvp);
+		if (IS_ERR(tvp)) {
+			ret = PTR_ERR(tvp);
+			break;
+		}
 		for (i = 0; i < tvps->num; i++) {
 			ret = mod_prop_get(mod, tvp + i);
 			if (ret < 0)
@@ -1625,7 +1662,7 @@ int ddbridge_mod_do_ioctl(struct file *file, unsigned int cmd, void *parg)
 				 tvps->num * sizeof(struct dtv_property)))
 			ret = -EFAULT;
 		kfree(tvp);
-		return ret;
+		break;
 
 	case DVB_MOD_SET:
 	{
@@ -1633,8 +1670,10 @@ int ddbridge_mod_do_ioctl(struct file *file, unsigned int cmd, void *parg)
 
 		if (dev->link[0].info->version < 2) {
 			if (mp->base_frequency != dev->mod_base.frequency)
-				if (set_base_frequency(dev, mp->base_frequency))
-					return -EINVAL;
+				if (set_base_frequency(dev, mp->base_frequency)) {
+					ret = -EINVAL;
+					break;
+				}
 		} else {
 			int i, streams = dev->link[0].info->port_num;
 
@@ -1659,11 +1698,15 @@ int ddbridge_mod_do_ioctl(struct file *file, unsigned int cmd, void *parg)
 		int res;
 
 		res = mod_set_modulation(mod, cp->modulation);
-		if (res)
-			return res;
+		if (res) {
+			ret = res;
+			break;
+		}
 		res = mod_set_ibitrate(mod, cp->input_bitrate);
-		if (res)
-			return res;
+		if (res) {
+			ret = res;
+			break;
+		}
 		mod->pcr_correction = cp->pcr_correction;
 		break;
 	}
@@ -1671,6 +1714,7 @@ int ddbridge_mod_do_ioctl(struct file *file, unsigned int cmd, void *parg)
 		ret = -EINVAL;
 		break;
 	}
+	mutex_unlock(&dev->ioctl_mutex);
 	return ret;
 }
 
@@ -1699,7 +1743,8 @@ static int mod_init_2(struct ddb *dev, u32 Frequency)
 		mod_set_vga(dev, RF_VGA_GAIN_N16);
 	else
 		mod_set_vga(dev, RF_VGA_GAIN_N24);
-	
+
+	udelay(10);
 	mod_set_attenuator(dev, 0);
 	return 0;
 }
diff --git a/ddbridge/ddbridge.h b/ddbridge/ddbridge.h
index 8eacd00..0e891d7 100644
--- a/ddbridge/ddbridge.h
+++ b/ddbridge/ddbridge.h
@@ -171,7 +171,8 @@ struct ddb_info {
 #define TS_QUIRK_REVERSED  2
 #define TS_QUIRK_NO_OUTPUT 4
 #define TS_QUIRK_ALT_OSC   8
-	u32 tempmon_irq;
+	u32   tempmon_irq;
+	u32   lostlock_irq;
 	const struct ddb_regmap *regmap;
 };
 
@@ -474,7 +475,7 @@ struct ddb {
 
 	struct mod_base        mod_base;
 	struct ddb_mod         mod[24];
-
+	struct mutex           ioctl_mutex; /* lock extra ioctls */
 };
 
 /****************************************************************************/
diff --git a/docs/modulator b/docs/modulator
index d468a49..36e2631 100644
--- a/docs/modulator
+++ b/docs/modulator
@@ -102,7 +102,7 @@ MODULATOR_STATUS and MODULATOR_RESET have been added to debug
 possible problems with too high temperatures (overtemperature)
 or PLL lock loss on FSM type cards.
 
-The MODUALTOR_STATUS property returns a __u32 with the following status bits:
+The MODULATOR_STATUS property returns a __u32 with the following status bits:
 
 - bit 0  : Lock status 1=lock OK, 0 = lock lost
 
@@ -113,8 +113,18 @@ The MODUALTOR_STATUS property returns a __u32 with the following status bits:
 - bit 2  : 0 = no overtemperature
            1 = overtemperature detected
 
+- bit 4  : 0 = PCIe link OK
+           1 = PCIe link lost
+
+In case of overtemperratur or PCIe link loss you will have to reboot the PC.
+
+
+Putting a MODULATOR_STATUS property with value 2 will enable the lost lock
+interrupt. This will set the gain to 0 and the attenuation to 31 in case
+of a lost PLL lock.
+
 
 The MODULATOR_RESET property can be used to reset the modulator without
-needing to reload the driver or rebooting.
+needing to reload the driver or rebooting in case of PLL lock loss.
 All channels should be stopped before using it and restarted after using it.
 Otherwise, results are unpredictable.