diff --git a/Makefile b/Makefile
index 916f95a6..e3023131 100644
--- a/Makefile
+++ b/Makefile
@@ -30,6 +30,8 @@ DROPBEAR=dropbear-2015.67
 DROPBEAR_SBIN_FILES=dropbear
 DROPBEAR_BIN_FILES=dbclient dropbearconvert dropbearkey scp
 
+ETHTOOL=ethtool-3.18
+
 # 10087?
 OSCAM_REV=10619
 
@@ -64,17 +66,19 @@ dist:
 # create CPIO
 #
 
-fs.cpio: kernel-modules busybox dropbear minisatip oscam tools/axehelper
+fs.cpio: kernel-modules busybox dropbear ethtool minisatip oscam tools/axehelper
 	fakeroot tools/do_min_fs.py \
 	  -r "$(VERSION)" \
 	  -b "bash strace" \
 	  $(foreach m,$(EXTRA_AXE_MODULES), -e "$(EXTRA_AXE_MODULES_DIR)/$(m):lib/modules/axe/$(m)") \
 	  $(foreach m,$(ORIG_FILES), -e "$(EXTRA_AXE_MODULES_DIR)/../$(m):lib/modules/axe/$(m)") \
+	  -e "tools/i2c_mangle.ko:lib/modules/axe/i2c_mangle.ko" \
 	  $(foreach m,$(KMODULES), -e "kernel/$(m):lib/modules/$(m)") \
 	  -e "tools/axehelper:sbin/axehelper" \
 	  -e "apps/$(BUSYBOX)/busybox:bin/busybox" \
 	  $(foreach f,$(DROPBEAR_SBIN_FILES), -e "apps/$(DROPBEAR)/$(f):sbin/$(f)") \
 	  $(foreach f,$(DROPBEAR_BIN_FILES), -e "apps/$(DROPBEAR)/$(f):usr/bin/$(f)") \
+	  -e "apps/$(ETHTOOL)/ethtool:sbin/ethtool" \
 	  -e "apps/minisatip/minisatip:sbin/minisatip" \
 	  -e "apps/minisatip/icons/lr.jpg:usr/share/minisatip/icons/lr.jpg" \
 	  -e "apps/minisatip/icons/lr.png:usr/share/minisatip/icons/lr.png" \
@@ -131,7 +135,10 @@ kernel/arch/sh/boot/uImage.gz: kernel/drivers/usb/serial/cp210x.ko fs.cpio
 	make -C kernel -j ${CPUS} PATH="$(PATH):$(TOOLPATH)" \
 	                          ARCH=sh CROSS_COMPILE=$(TOOLCHAIN_KERNEL)/bin/sh4-linux- uImage.gz
 
-.PHONY: kernel-modules
+tools/i2c_mangle.ko: tools/i2c_mangle.c
+	make -C tools ARCH=sh CROSS_COMPILE=$(TOOLCHAIN_KERNEL)/bin/sh4-linux- all
+
+.PHONY: kernel-modules tools/i2c_mangle.ko
 kernel-modules: kernel/drivers/usb/serial/cp210x.ko
 
 .PHONY: kernel
@@ -250,6 +257,26 @@ apps/$(DROPBEAR)/dropbear: apps/$(DROPBEAR)/configure
 .PHONY: dropbear
 dropbear: apps/$(DROPBEAR)/dropbear
 
+#
+# ethtool
+#
+
+apps/$(ETHTOOL)/configure:
+	$(call WGET,https://www.kernel.org/pub/software/network/ethtool/$(ETHTOOL).tar.gz,apps/$(ETHTOOL).tar.gz)
+	tar -C apps -xzf apps/$(ETHTOOL).tar.gz
+
+apps/$(ETHTOOL)/ethtool: apps/$(ETHTOOL)/configure
+	cd apps/$(ETHTOOL) && \
+	  CC=$(TOOLCHAIN)/bin/sh4-linux-gcc \
+	  CFLAGS="-O2" \
+	./configure \
+	  --host=sh4-linux \
+	  --prefix=/
+	make -C apps/$(ETHTOOL)
+
+.PHONY: ethtool
+ethtool: apps/$(ETHTOOL)/ethtool
+
 #
 # oscam
 #
diff --git a/fs-add/etc/config.default b/fs-add/etc/config.default
index cb534804..b5e8d620 100644
--- a/fs-add/etc/config.default
+++ b/fs-add/etc/config.default
@@ -2,9 +2,15 @@
 # SATIP AXE firmware configuration
 #
 
+CFGVER="8"
 HOSTNAME="satip-axe"
 KMODULES="drivers/usb/serial/cp210x.ko drivers/usb/serial/pl2303.ko drivers/usb/serial/ftdi_sio.ko"
 
+#
+# STV6210 baseband amplifier gain (0dB .. 16dB - 2dB step)
+#
+STV6210_BAMP="16dB"
+
 #
 # ttyUSB names
 #
diff --git a/fs-add/etc/init.d/rcS b/fs-add/etc/init.d/rcS
index 4d2defd0..dde14dc1 100755
--- a/fs-add/etc/init.d/rcS
+++ b/fs-add/etc/init.d/rcS
@@ -54,12 +54,14 @@ fi
 ifconfig lo 127.0.0.1 netmask 255.255.255.0
 
 # AXE modules and AXE hw initialization
-sync
+logger -p local0.notice "AXE drivers load start"
+axehelper i2c_reg_read 0xd0 0xf000 > /dev/null 2> /dev/null || logger -p local0.notice "I2C Demod #1(D0) failed"
+axehelper i2c_reg_read 0xd2 0xf000 > /dev/null 2> /dev/null || logger -p local0.notice "I2C Demod #2(D2) failed"
 d=/lib/modules/axe
 insmod $d/stapi_core_stripped.ko
 insmod $d/stapi_ioctl_stripped.ko
 insmod $d/axe_i2c.ko
-echo "i2c_dbg_trans 1" > /proc/bus/ivo_i2c
+insmod $d/i2c_mangle.ko
 insmod $d/axe_fe.ko
 insmod $d/axe_fp.ko
 insmod $d/axe_dmx.ko
@@ -102,11 +104,9 @@ for i in $(cat /proc/devices); do
   maj=
 done
 /etc/init.d/axe &
-axehelper wait 5000 -10 /tmp/axe-done
-axehelper wait 2000 -10
-#nc -l 127.0.0.1:1001 -e /bin/true
+nc -l 127.0.0.1:1001 -e /bin/true
 rm -f /root/main_init.sh /tmp/axe-done
-echo "i2c_dbg_trans 0" > /proc/bus/ivo_i2c
+logger -p local0.notice "AXE drivers load finish"
 
 # hostname
 test -r /etc/sysconfig/config && . /etc/sysconfig/config
diff --git a/fs-add/etc/init.d/satip b/fs-add/etc/init.d/satip
index 7842fd13..1bdaa951 100755
--- a/fs-add/etc/init.d/satip
+++ b/fs-add/etc/init.d/satip
@@ -6,12 +6,16 @@ if test "$MINISATIP" != "yes"; then
   exit 0
 fi
 
+. /etc/init.d/axe-settings
+
 # renice kernel demuxers
-a=""
-for i in $(ps -o pid,nice,comm | grep "kdmxts_64" | cut -d 'k' -f 1); do
-  if test "$i" -gt 15; then a="$a $i"; fi
-done
-renice -15 $a
+if test "$DEMUXERS_RENICE" = "yes"; then
+  a=""
+  for i in $(ps -o pid,nice,comm | grep "kdmxts_64" | cut -d 'k' -f 1); do
+    if test "$i" -gt 15; then a="$a $i"; fi
+  done
+  renice -15 $a
+fi
 
 cd /tmp
 while test ! -f /tmp/nosatip; do
@@ -20,8 +24,8 @@ while test ! -f /tmp/nosatip; do
   done
   . /etc/sysconfig/config
   nice -5 minisatip -f -g $MINISATIP_OPTS
-  logger "minisatip exited $?, restarting"
+  logger -p local0.notice "minisatip exited $?, restarting"
+  if test -f /tmp/nosatip; then
+    sleep 87323123
+  fi
 done
-if test -f /tmp/nosatip; then
-  sleep 87323123
-fi
diff --git a/tools/.gitignore b/tools/.gitignore
index ab2ccdac..a1b350a8 100644
--- a/tools/.gitignore
+++ b/tools/.gitignore
@@ -1,6 +1,12 @@
+*.cmd
 axehelper
 axehelper.x86_64
 syscall-dump.o
 syscall-dump.o.x86_64
 syscall-dump.so
 syscall-dump.so.x86_64
+i2c_mangle.mod.*
+i2c_mangle.o
+i2c_mangle.ko
+Module.symvers
+modules.order
diff --git a/tools/Makefile b/tools/Makefile
new file mode 100644
index 00000000..a2bbdb2c
--- /dev/null
+++ b/tools/Makefile
@@ -0,0 +1,7 @@
+obj-m=i2c_mangle.o
+
+all:
+	make -C $(PWD)/kernel ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) M=$(PWD)/tools modules
+
+clean:
+	make -C $(PWD)/kernel ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) M=$(PWD)/tools clean
diff --git a/tools/i2c_mangle.c b/tools/i2c_mangle.c
new file mode 100644
index 00000000..585f0890
--- /dev/null
+++ b/tools/i2c_mangle.c
@@ -0,0 +1,187 @@
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/idr.h>
+#include <linux/mutex.h>
+#include <linux/completion.h>
+#include <linux/hardirq.h>
+#include <linux/irqflags.h>
+#include <linux/rwsem.h>
+#include <asm/uaccess.h>
+
+#define STV6120_1 (0xc0 >> 1)
+#define STV6120_2 (0xc6 >> 1)
+
+extern int (*i2c_transfer_mangle)(struct i2c_adapter *adap, struct i2c_msg *msg, int num);
+int i2c_transfer2(struct i2c_adapter *adap, struct i2c_msg *msg, int num);
+
+static struct i2c_adapter *i2c_adapter0;
+static int i2c_mangle_enable = 1;
+static int i2c_mangle_debug = 0;
+static int stv6120_gain = 8;
+
+static void i2c_transfer_axe_dump(struct i2c_msg *msgs, int num)
+{
+	int ret;
+
+	for (ret = 0; ret < num; ret++) {
+		printk("i2c master_xfer[%d] %c, addr=0x%02x, "
+			"len=%d%s, flags=0x%x\n", ret, (msgs[ret].flags & I2C_M_RD)
+			? 'R' : 'W', msgs[ret].addr, msgs[ret].len,
+			(msgs[ret].flags & I2C_M_RECV_LEN) ? "+" : "",
+			msgs[ret].flags);
+	}
+}
+
+static void mangle(u8 *dst, struct i2c_msg *m, int i, int val, int shift, int mask)
+{
+	memcpy(dst, m->buf, m->len);
+	dst[i] &= ~(mask << shift);
+	dst[i] |= (val & mask) << shift;
+	if (i2c_mangle_debug & 2)
+		printk("i2c mangle: i=%d val=0x%x shift=%i mask=0x%x (orig 0x%x new 0x%x)\n",
+			i, val, shift, mask, m->buf[i], dst[i]);
+	if (m->buf[i] != dst[i])
+		m->buf = dst;
+}
+
+static void i2c_transfer_axe_mangle(struct i2c_msg *msgs, int num)
+{
+	static u8 mbuf[4][32];
+	struct i2c_msg *m;
+	int ret, r, i;
+
+	for (ret = 0; ret < num && ret < ARRAY_SIZE(mbuf); ret++) {
+		m = msgs + ret;
+		if (m->len < 1 || (m->flags & I2C_M_RD) != 0)
+			continue;
+		if (m->addr == STV6120_1 || m->addr == STV6120_2)
+			for (r = m->buf[0], i = 1; i < m->len; i++, r++)
+				if (r == 0x01 || r == 0x0b)
+					mangle(mbuf[ret], m, i, stv6120_gain, 0, 0x0f);
+	}
+}
+
+static int i2c_transfer_axe(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
+{
+	if (adap == i2c_adapter0) {
+		if (i2c_mangle_debug & 1)
+			i2c_transfer_axe_dump(msgs, num);
+		if (i2c_mangle_enable)
+			i2c_transfer_axe_mangle(msgs, num);
+	}
+	return i2c_transfer2(adap, msgs, num);
+}
+
+/*
+ *
+ */
+
+static ssize_t i2c_mangle_enable_show
+  (struct device *dev, struct device_attribute *attr, char *page)
+{
+	return sprintf(page, "%u\n", i2c_mangle_enable);
+}
+
+static ssize_t i2c_mangle_enable_store
+  (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+	int val = 0;
+	if (sscanf(buf, "%u", &val) != 1)
+		return -EINVAL;
+	i2c_mangle_enable = val;
+	return count;
+}
+
+static DEVICE_ATTR(i2c_mangle_enable, 0644,
+		   i2c_mangle_enable_show,
+		   i2c_mangle_enable_store);
+
+static ssize_t i2c_mangle_debug_show
+  (struct device *dev, struct device_attribute *attr, char *page)
+{
+	return sprintf(page, "%u\n", i2c_mangle_debug);
+}
+
+static ssize_t i2c_mangle_debug_store
+  (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+	int val = 0;
+	if (sscanf(buf, "%u", &val) != 1)
+		return -EINVAL;
+	i2c_mangle_debug = val;
+	return count;
+}
+
+static DEVICE_ATTR(i2c_mangle_debug, 0644,
+		   i2c_mangle_debug_show,
+		   i2c_mangle_debug_store);
+
+static ssize_t stv6120_gain_show
+  (struct device *dev, struct device_attribute *attr, char *page)
+{
+	return sprintf(page, "%u\n", stv6120_gain);
+}
+
+static ssize_t stv6120_gain_store
+  (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+	int val = 0;
+	if (sscanf(buf, "%u", &val) != 1)
+		return -EINVAL;
+	stv6120_gain = val;
+	return count;
+}
+
+static DEVICE_ATTR(stv6120_gain, 0644,
+		   stv6120_gain_show,
+		   stv6120_gain_store);
+
+static void sysfs_create_entries(void)
+{
+	struct kobject *kobj = &i2c_adapter0->dev.kobj;
+
+	sysfs_create_file(kobj, &dev_attr_i2c_mangle_enable.attr);
+	sysfs_create_file(kobj, &dev_attr_i2c_mangle_debug.attr);
+	sysfs_create_file(kobj, &dev_attr_stv6120_gain.attr);
+}
+
+static void sysfs_remove_entries(void)
+{
+	struct kobject *kobj = &i2c_adapter0->dev.kobj;
+
+	sysfs_remove_file(kobj, &dev_attr_i2c_mangle_enable.attr);
+	sysfs_remove_file(kobj, &dev_attr_i2c_mangle_debug.attr);
+	sysfs_remove_file(kobj, &dev_attr_stv6120_gain.attr);
+}
+
+/*
+ *
+ */
+
+int init_module(void)
+{
+	i2c_adapter0 = i2c_get_adapter(0);
+	if (i2c_adapter0 == NULL) {
+		printk(KERN_ERR "i2c_mangle: unable to find adapter 0\n");
+		return -ENODEV;
+	}
+	sysfs_create_entries();
+	i2c_transfer_mangle = i2c_transfer_axe;
+	printk(KERN_INFO "I2C-Bus AXE mangle module loaded\n");
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	sysfs_remove_entries();
+	i2c_transfer_mangle = NULL;
+	i2c_put_adapter(i2c_adapter0);
+}
+
+MODULE_AUTHOR("Jaroslav Kysela");
+MODULE_DESCRIPTION("I2C-Bus AXE mangle module");
+MODULE_LICENSE("GPL");