--- ../vdr-1.5.12-dvbs2-other/device.c	2008-01-01 22:55:18.000000000 +0100
+++ device.c	2008-01-05 18:06:15.000000000 +0100
@@ -359,6 +359,21 @@ cDevice *cDevice::GetDevice(int Index)
   return (0 <= Index && Index < numDevices) ? device[Index] : NULL;
 }
 
+inline int GetClippedModulationSystemCount(int AvailableBits, cDevice *Device)
+{
+  int ModulationSystemCount = Device->ModulationSystemCount();
+  int MaxModulationSystemCount = 1 << AvailableBits;
+  if (ModulationSystemCount > MaxModulationSystemCount) {
+     esyslog("ERROR: device %d supports %d modulation systems but cDevice::GetDevice() currently only supports %d modulation systems which should be fixed", Device->CardIndex() + 1, ModulationSystemCount, MaxModulationSystemCount);
+     ModulationSystemCount = MaxModulationSystemCount;
+     }
+  else if (ModulationSystemCount <= 0) {
+     esyslog("ERROR: device %d reported an invalid number (%d) of supported modulation systems. The device should be fixed to return at least 1", Device->CardIndex() + 1, ModulationSystemCount);
+     ModulationSystemCount = 1;
+     }
+  return ModulationSystemCount;
+}
+
 cDevice *cDevice::GetDevice(const cChannel *Channel, int Priority, bool LiveView)
 {
   // Collect the current priorities of all CAM slots that can decrypt the channel:
@@ -408,11 +423,13 @@ cDevice *cDevice::GetDevice(const cChann
              imp <<= 1; imp |= LiveView ? !device[i]->IsPrimaryDevice() || ndr : 0;                                  // prefer the primary device for live viewing if we don't need to detach existing receivers
              imp <<= 1; imp |= !device[i]->Receiving() && (device[i] != cTransferControl::ReceiverDevice() || device[i]->IsPrimaryDevice()) || ndr; // use receiving devices if we don't need to detach existing receivers, but avoid primary device in local transfer mode
              imp <<= 1; imp |= device[i]->Receiving();                                                               // avoid devices that are receiving
+/*1*/        imp <<= 2; imp |= GetClippedModulationSystemCount(2, device[i]) - 1;                                    // avoid cards which support multiple modulation systems
              imp <<= 1; imp |= device[i] == cTransferControl::ReceiverDevice();                                      // avoid the Transfer Mode receiver device
              imp <<= 8; imp |= min(max(device[i]->Priority() + MAXPRIORITY, 0), 0xFF);                               // use the device with the lowest priority (+MAXPRIORITY to assure that values -99..99 can be used)
              imp <<= 8; imp |= min(max((NumUsableSlots ? SlotPriority[j] : 0) + MAXPRIORITY, 0), 0xFF);              // use the CAM slot with the lowest priority (+MAXPRIORITY to assure that values -99..99 can be used)
              imp <<= 1; imp |= ndr;                                                                                  // avoid devices if we need to detach existing receivers
              imp <<= 1; imp |= device[i]->IsPrimaryDevice();                                                         // avoid the primary device
+///*2*/        imp <<= 2; imp |= GetClippedModulationSystemCount(2, device[i]) - 1;                                    // avoid cards which support multiple modulation systems
              imp <<= 1; imp |= NumUsableSlots ? 0 : device[i]->HasCi();                                              // avoid cards with Common Interface for FTA channels
              imp <<= 1; imp |= device[i]->HasDecoder();                                                              // avoid full featured cards
              imp <<= 1; imp |= NumUsableSlots ? !ChannelCamRelations.CamDecrypt(Channel->GetChannelID(), j + 1) : 0; // prefer CAMs that are known to decrypt this channel
--- ../vdr-1.5.12-dvbs2-other/device.h	2007-10-21 11:21:52.000000000 +0200
+++ device.h	2008-01-05 17:22:25.000000000 +0100
@@ -224,6 +224,10 @@ public:
          ///< function itself actually returns true.
          ///< The default implementation always returns false, so a derived cDevice
          ///< class that can provide channels must implement this function.
+  virtual int ModulationSystemCount() const { return 0; }
+         ///< Returns the number of modulation systems the device supports.
+         ///< The default implementation always returns 0, so a derived cDevice
+         ///< class that can provide channels must implement this function.
   virtual bool IsTunedToTransponder(const cChannel *Channel);
          ///< Returns true if this device is currently tuned to the given Channel's
          ///< transponder.
--- ../vdr-1.5.12-dvbs2-other/dvbdevice.c	2008-01-01 22:55:18.000000000 +0100
+++ dvbdevice.c	2008-01-05 17:36:36.000000000 +0100
@@ -406,6 +406,7 @@ cDvbDevice::cDvbDevice(int n)
 {
   ciAdapter = NULL;
   dvbTuner = NULL;
+  modulationSystemCount = 0;
   frontendType = DVBFE_DELSYS_DUMMY;
   spuDecoder = NULL;
   digitalAudio = false;
@@ -468,8 +469,14 @@ cDvbDevice::cDvbDevice(int n)
   // We only check the devices that must be present - the others will be checked before accessing them://XXX
 
   if (fd_frontend >= 0) {
-     if (ioctl(fd_frontend, DVBFE_GET_DELSYS, &frontendType) >= 0)
+     if (ioctl(fd_frontend, DVBFE_GET_DELSYS, &frontendType) >= 0) {
+        // determine number of supported modulation systems by counting the bits
+        for (int i = 0; i < 32; i++) {
+            if (frontendType & (1u << i))
+               modulationSystemCount++;
+            }
         dvbTuner = new cDvbTuner(fd_frontend, CardIndex(), frontendType);
+        }
      else
         LOG_ERROR;
      }
@@ -798,7 +805,13 @@ bool cDvbDevice::ProvidesSource(int Sour
 
 bool cDvbDevice::ProvidesTransponder(const cChannel *Channel) const
 {
-  return ProvidesSource(Channel->Source()) && (!cSource::IsSat(Channel->Source()) || !Setup.DiSEqC || Diseqcs.Get(Channel->Source(), Channel->Frequency(), Channel->Polarization()));
+  if (!ProvidesSource(Channel->Source()))
+     return false; // doesn't provide source
+  if (!cSource::IsSat(Channel->Source()))
+     return true; // source is sufficient for non sat
+  if (!(frontendType & Channel->ModulationSystem()))
+     return false; // requires modulation system which frontend doesn't provide
+  return !Setup.DiSEqC || Diseqcs.Get(Channel->Source(), Channel->Frequency(), Channel->Polarization());
 }
 
 bool cDvbDevice::ProvidesChannel(const cChannel *Channel, int Priority, bool *NeedsDetachReceivers) const
@@ -807,7 +820,7 @@ bool cDvbDevice::ProvidesChannel(const c
   bool hasPriority = Priority < 0 || Priority > this->Priority();
   bool needsDetachReceivers = false;
 
-  if (ProvidesSource(Channel->Source())) {
+  if (ProvidesTransponder(Channel)) {
      result = hasPriority;
      if (Priority >= 0 && Receiving(true)) {
         if (dvbTuner->IsTunedTo(Channel)) {
--- ../vdr-1.5.12-dvbs2-other/dvbdevice.h	2008-01-01 22:55:18.000000000 +0100
+++ dvbdevice.h	2008-01-05 17:29:49.000000000 +0100
@@ -35,6 +35,7 @@ public:
          ///< Must be called before accessing any DVB functions.
          ///< \return True if any devices are available.
 private:
+  int modulationSystemCount;
   dvbfe_delsys frontendType;
   int fd_osd, fd_audio, fd_video, fd_dvr, fd_stc, fd_ca;
 protected:
@@ -66,6 +67,7 @@ public:
   virtual bool ProvidesSource(int Source) const;
   virtual bool ProvidesTransponder(const cChannel *Channel) const;
   virtual bool ProvidesChannel(const cChannel *Channel, int Priority = -1, bool *NeedsDetachReceivers = NULL) const;
+  virtual int ModulationSystemCount() const { return modulationSystemCount; }
   virtual bool IsTunedToTransponder(const cChannel *Channel);
 protected:
   virtual bool SetChannelDevice(const cChannel *Channel, bool LiveView);
