diff --git a/backend/genesys/gl841.cpp b/backend/genesys/gl841.cpp
index 2d042a9bc..2b4b347fc 100644
--- a/backend/genesys/gl841.cpp
+++ b/backend/genesys/gl841.cpp
@@ -512,7 +512,6 @@ static void gl841_send_slope_table(Genesys_Device* dev, int table_nr,
     DBG_HELPER_ARGS(dbg, "table_nr = %d, steps = %d", table_nr, steps);
   int dpihw;
   int start_address;
-  char msg[4000];
 /*#ifdef WORDS_BIGENDIAN*/
   int i;
 /*#endif*/
@@ -535,15 +534,6 @@ static void gl841_send_slope_table(Genesys_Device* dev, int table_nr,
       table[i * 2 + 1] = slope_table[i] >> 8;
   }
 
-  if (DBG_LEVEL >= DBG_io)
-    {
-        std::sprintf(msg, "write slope %d (%d)=", table_nr, steps);
-        for (i = 0; i < steps; i++) {
-            std::sprintf (msg+strlen(msg), ",%d", slope_table[i]);
-	}
-      DBG(DBG_io, "%s: %s\n", __func__, msg);
-    }
-
     if (dev->interface->is_mock()) {
         dev->interface->record_slope_table(table_nr, slope_table);
     }
diff --git a/backend/genesys/gl843.cpp b/backend/genesys/gl843.cpp
index 1ab537fd9..acb2791a8 100644
--- a/backend/genesys/gl843.cpp
+++ b/backend/genesys/gl843.cpp
@@ -665,7 +665,6 @@ static void gl843_send_slope_table(Genesys_Device* dev, int table_nr,
     DBG_HELPER_ARGS(dbg, "table_nr = %d, steps = %d", table_nr, steps);
 
   int i;
-  char msg[10000];
 
   std::vector<uint8_t> table(steps * 2);
   for (i = 0; i < steps; i++)
@@ -674,15 +673,6 @@ static void gl843_send_slope_table(Genesys_Device* dev, int table_nr,
       table[i * 2 + 1] = slope_table[i] >> 8;
     }
 
-  if (DBG_LEVEL >= DBG_io)
-    {
-        std::sprintf(msg, "write slope %d (%d)=", table_nr, steps);
-        for (i = 0; i < steps; i++) {
-            std::sprintf (msg+strlen(msg), "%d", slope_table[i]);
-	}
-      DBG(DBG_io, "%s: %s\n", __func__, msg);
-    }
-
     if (dev->interface->is_mock()) {
         dev->interface->record_slope_table(table_nr, slope_table);
     }
diff --git a/backend/genesys/gl846.cpp b/backend/genesys/gl846.cpp
index 56626ce1b..23d0ed768 100644
--- a/backend/genesys/gl846.cpp
+++ b/backend/genesys/gl846.cpp
@@ -233,7 +233,6 @@ static void gl846_send_slope_table(Genesys_Device* dev, int table_nr,
 {
     DBG_HELPER_ARGS(dbg, "table_nr = %d, steps = %d", table_nr, steps);
   int i;
-  char msg[10000];
 
   /* sanity check */
   if(table_nr<0 || table_nr>4)
@@ -248,16 +247,6 @@ static void gl846_send_slope_table(Genesys_Device* dev, int table_nr,
       table[i * 2 + 1] = slope_table[i] >> 8;
     }
 
-  if (DBG_LEVEL >= DBG_io)
-    {
-        std::sprintf(msg, "write slope %d (%d)=", table_nr, steps);
-      for (i = 0; i < steps; i++)
-        {
-            std::sprintf(msg+strlen(msg), "%d", slope_table[i]);
-        }
-      DBG (DBG_io, "%s: %s\n", __func__, msg);
-    }
-
     if (dev->interface->is_mock()) {
         dev->interface->record_slope_table(table_nr, slope_table);
     }
diff --git a/backend/genesys/gl847.cpp b/backend/genesys/gl847.cpp
index bb11e7bc1..a275c1755 100644
--- a/backend/genesys/gl847.cpp
+++ b/backend/genesys/gl847.cpp
@@ -254,7 +254,6 @@ static void gl847_send_slope_table(Genesys_Device* dev, int table_nr,
 {
     DBG_HELPER_ARGS(dbg, "table_nr = %d, steps = %d", table_nr, steps);
   int i;
-  char msg[10000];
 
   /* sanity check */
   if(table_nr<0 || table_nr>4)
@@ -269,16 +268,6 @@ static void gl847_send_slope_table(Genesys_Device* dev, int table_nr,
       table[i * 2 + 1] = slope_table[i] >> 8;
     }
 
-  if (DBG_LEVEL >= DBG_io)
-    {
-        std::sprintf(msg, "write slope %d (%d)=", table_nr, steps);
-      for (i = 0; i < steps; i++)
-	{
-            std::sprintf(msg + std::strlen(msg), "%d", slope_table[i]);
-	}
-      DBG (DBG_io, "%s: %s\n", __func__, msg);
-    }
-
     if (dev->interface->is_mock()) {
         dev->interface->record_slope_table(table_nr, slope_table);
     }