diff --git a/targets/ARCH/COMMON/common_lib.h b/targets/ARCH/COMMON/common_lib.h
index 2dc1650bfd..3a4b83f4e6 100644
--- a/targets/ARCH/COMMON/common_lib.h
+++ b/targets/ARCH/COMMON/common_lib.h
@@ -199,6 +199,8 @@ typedef struct {
   double tx_bw;
   //! clock source 
   clock_source_t clock_source;
+  //! timing_source
+  clock_source_t timing_source;
   //! Auto calibration flag
   int autocal[4];
   //! rf devices work with x bits iqs when oai have its own iq format
diff --git a/targets/ARCH/ETHERNET/USERSPACE/LIB/ethernet_lib.c b/targets/ARCH/ETHERNET/USERSPACE/LIB/ethernet_lib.c
index 108c4ca069..595b8a52e8 100644
--- a/targets/ARCH/ETHERNET/USERSPACE/LIB/ethernet_lib.c
+++ b/targets/ARCH/ETHERNET/USERSPACE/LIB/ethernet_lib.c
@@ -116,7 +116,7 @@ int trx_eth_start(openair0_device *device) {
     */
 
     /* adjust MTU wrt number of samples per packet */
-    if(ethernet_tune (device,MTU_SIZE,UDP_IF4p5_PRACH_SIZE_BYTES)!=0)  return -1;
+    //if(ethernet_tune (device,MTU_SIZE,UDP_IF4p5_PRACH_SIZE_BYTES)!=0)  return -1;
      
 
 
diff --git a/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp b/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
index 8b62a8e698..aba84b24da 100644
--- a/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
+++ b/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
@@ -1004,6 +1004,15 @@ extern "C" {
             else
                 s->usrp->set_clock_source("external");
 
+            if (openair0_cfg[0].time_source == internal){
+                LOG_I(PHY,"Setting time source to internal\n");
+                s->usrp->set_time_source("internal");
+            }
+            else{
+                LOG_I(PHY,"Setting time source to external\n");
+                s->usrp->set_time_source("external");
+            }
+
             //Setting device type to USRP X300/X310
             device->type=USRP_X300_DEV;
 
@@ -1062,12 +1071,22 @@ extern "C" {
 
             // lock mboard clocks
             if (openair0_cfg[0].clock_source == internal){
+		LOG_I(PHY,"Setting clock source to internal\n");
 	        s->usrp->set_clock_source("internal");
             }
             else{
+                LOG_I(PHY,"Setting clock source to external\n");		
                 s->usrp->set_clock_source("external");
-		s->usrp->set_time_source("external");
             }	
+            if (openair0_cfg[0].time_source == internal){
+                LOG_I(PHY,"Setting time source to internal\n");
+                s->usrp->set_time_source("internal");
+            }
+            else{
+                LOG_I(PHY,"Setting time source to external\n");
+                s->usrp->set_time_source("external");
+            }
+
 
             device->type = USRP_B200_DEV;
             if ((vers == 3) && (subvers == 9) && (subsubvers>=2)) {
diff --git a/targets/RT/USER/lte-ru.c b/targets/RT/USER/lte-ru.c
index 35b29a1798..732c5a2ba7 100644
--- a/targets/RT/USER/lte-ru.c
+++ b/targets/RT/USER/lte-ru.c
@@ -1880,7 +1880,7 @@ void *ru_thread_synch(void *arg) {
 	ru->state    = RU_RUN;
       } // symc_pos > 0
       else {
-	if (cnt>50) {
+	if (cnt>1000) {
            write_output("ru_sync.m","sync",(void*)&sync_corr[0],fp->samples_per_tti*5,1,2);
            write_output("ru_rx.m","rxs",(void*)ru->common.rxdata[0],fp->samples_per_tti*10,1,1);
           exit(1);