diff --git a/plugins/channelrx/demoddatv/datvdemodgui.cpp b/plugins/channelrx/demoddatv/datvdemodgui.cpp
index 8942fbc6e..214c9b7b5 100644
--- a/plugins/channelrx/demoddatv/datvdemodgui.cpp
+++ b/plugins/channelrx/demoddatv/datvdemodgui.cpp
@@ -346,8 +346,10 @@ void DATVDemodGUI::displaySettings()
     }
 #endif
 
-    if (m_settings.m_standard == DATVDemodSettings::dvb_version::DVB_S) {
+    if (m_settings.m_standard == DATVDemodSettings::dvb_version::DVB_S)
+    {
         ui->statusText->clear();
+        ui->statusText->setStyleSheet("QLabel { background:rgb(79,79,79); }");
     }
 
     ui->cmbFilter->setCurrentIndex((int) m_settings.m_filter);
@@ -606,8 +608,10 @@ void DATVDemodGUI::on_cmbStandard_currentIndexChanged(int index)
     }
 #endif
 
-    if (m_settings.m_standard == DATVDemodSettings::dvb_version::DVB_S) {
+    if (m_settings.m_standard == DATVDemodSettings::dvb_version::DVB_S)
+    {
         ui->statusText->clear();
+        ui->statusText->setStyleSheet("QLabel { background:rgb(79,79,79); }");
     }
 
     m_settings.validateSystemConfiguration();
diff --git a/plugins/channelrx/demoddatv/datvdemodgui.ui b/plugins/channelrx/demoddatv/datvdemodgui.ui
index a8ead08e6..93f51d6fd 100644
--- a/plugins/channelrx/demoddatv/datvdemodgui.ui
+++ b/plugins/channelrx/demoddatv/datvdemodgui.ui
@@ -720,6 +720,9 @@
          <height>19</height>
         </rect>
        </property>
+       <property name="toolTip">
+        <string>Modulation detection status</string>
+       </property>
        <property name="text">
         <string>...</string>
        </property>
diff --git a/plugins/channelrx/demoddatv/datvdemodsink.cpp b/plugins/channelrx/demoddatv/datvdemodsink.cpp
index cd781684f..d7941c98f 100644
--- a/plugins/channelrx/demoddatv/datvdemodsink.cpp
+++ b/plugins/channelrx/demoddatv/datvdemodsink.cpp
@@ -177,7 +177,6 @@ bool DATVDemodSink::playVideo()
         m_objVideoStream->MultiThreaded = true;
         m_objVideoStream->ThreadTimeOut = DATVideoRenderThread::videoThreadTimeoutMs;
         m_objRenderThread->start();
-        return true;
     }
 
     return false;
@@ -893,7 +892,7 @@ void DATVDemodSink::InitDATVS2Framework()
     m_objCfg.fastlock = m_settings.m_fastLock;
 
     m_objCfg.sampler = m_settings.m_filter;
-    m_objCfg.rolloff = m_settings.m_rollOff;  //0...1
+    m_objCfg.rolloff = m_settings.m_rollOff * 1.001f;  //0...1 and correct 0.2 bug
     m_objCfg.rrc_rej = (float) m_settings.m_excursion;  //dB
     m_objCfg.rrc_steps = 0; //auto
 
diff --git a/plugins/channelrx/demoddatv/datvideorender.h b/plugins/channelrx/demoddatv/datvideorender.h
index 6ac6ae90c..b891d9398 100644
--- a/plugins/channelrx/demoddatv/datvideorender.h
+++ b/plugins/channelrx/demoddatv/datvideorender.h
@@ -234,8 +234,7 @@ class DATVideoRenderThread : public QThread
         m_renderingVideo = false;
     }
 
-    void stopRendering()
-    {
+    void stopRendering() {
         m_renderingVideo = false;
     }
 
diff --git a/plugins/channelrx/demoddatv/leansdr/dvbs2.h b/plugins/channelrx/demoddatv/leansdr/dvbs2.h
index d60b4b882..185090db8 100644
--- a/plugins/channelrx/demoddatv/leansdr/dvbs2.h
+++ b/plugins/channelrx/demoddatv/leansdr/dvbs2.h
@@ -793,7 +793,11 @@ struct s2_frame_receiver : runnable
 
     void run_frame_detect()
     {
-        if ( discard )
+        cstln->m_rateCode = -1;
+        cstln->m_typeCode = -1;
+        cstln->m_setByModcod = cstln->m_typeCode != -1;
+
+        if (discard)
         {
             size_t d = std::min(discard, in.readable());
             in.read(d);
@@ -921,7 +925,7 @@ struct s2_frame_receiver : runnable
         if (sof_errors >= S2_MAX_ERR_SOF)
         {
             if (sch->debug2) {
-                fprintf(stderr, "Too many errors in SOF (%u/26)\n", sof_errors);
+                fprintf(stderr, "Too many errors in SOF (%u/%u)\n", sof_errors, S2_MAX_ERR_SOF);
             }
 
             in.read(ss.p-in.rd());
@@ -1087,7 +1091,7 @@ struct s2_frame_receiver : runnable
             cstln = dcstln;  // Used by GUI
             cstln->m_rateCode = mcinfo->rate < code_rate::FEC_COUNT ? mcinfo->rate : -1;
             cstln->m_typeCode = mcinfo->c < cstln_base::predef::COUNT ? mcinfo->c : -1;
-            cstln->m_setByModcod = true;
+            cstln->m_setByModcod = cstln->m_typeCode != -1;
             // Output special slot with PLS information.
             pout->is_pls = true;
             pout->pls = pls;
@@ -1658,17 +1662,19 @@ struct s2_frame_receiver : runnable
             fprintf(stderr, "match_frame\n");
         }
 
+        bool pilots = pls->pilots; // force to true for lighter processing
         // With pilots: Use first block of data slots.
         // Without pilots: Use whole frame.
-        int ns = pls->pilots ? 16*90 : S*90;
+        int ns = pilots ? 16*90 : S*90;
         // Pilots: steps of ~700 ppm (= 1 cycle between pilots)
         // No pilots, normal frames: steps of ~30(QPSK) - ~80(32APSK) ppm
         // No pilots, short frames: steps of ~120(QPSK) - 300(32APSK) ppm
-        int nwrap = pls->pilots ? 16*90+pilot.LENGTH : S*90+sof.LENGTH;
+        int nwrap = pilots ? 16*90+pilot.LENGTH : S*90+sof.LENGTH;
         // Frequency search range.
-        int sliprange = pls->pilots ? 10 : 50;  // TBD Customizable ?
+        int sliprange = pilots ? 10 : 50;  // TBD Customizable ?
         float besterr = 1e99;
         float bestslip = 0;  // Avoid compiler warning
+        int err_div = ns * cstln_amp * cstln_amp;
 
         for (int slip = -sliprange; slip <= sliprange; ++slip)
         {
@@ -1685,12 +1691,12 @@ struct s2_frame_receiver : runnable
                 std::complex<float> p = interp_next(&ssl) * ssl.gain;
                 typename cstln_lut<SOFTSYMB,256>::result *cr =
                     dcstln->lookup(p.real(), p.imag());
-                std::complex<int8_t> &cp = dcstln->symbols[cr->symbol];
-                std::complex<float> ev(p.real()-cp.real(), p.imag()-cp.imag());
-                err += cnorm2(ev);
+                float evreal = p.real() - dcstln->symbols[cr->symbol].real();
+                float evimag = p.imag() - dcstln->symbols[cr->symbol].imag();
+                err += evreal*evreal + evimag*evimag;
             }
 
-            err /= ns * cstln_amp * cstln_amp;
+            err /= err_div;
 
             if (err < besterr)
             {