diff --git a/ChangeLog b/ChangeLog
index 9d4059875..27c5110b0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,6 @@
 2010-06-03 Stéphane Voltz <stef.dev@free.fr>
-	* backend/genesys.c backend/genesys_devices.c backend/genesys_gl847.c:
+	* backend/genesys.c backend/genesys_devices.c backend/genesys_gl847.c
+	doc/descriptions/genesys.desc:
 	final bits for full LiDE 100 support
 
 2010-05-31 Stéphane Voltz <stef.dev@free.fr>
diff --git a/backend/genesys.c b/backend/genesys.c
index ce2ce19e0..54b9c39d3 100644
--- a/backend/genesys.c
+++ b/backend/genesys.c
@@ -4731,27 +4731,30 @@ genesys_start_scan (Genesys_Device * dev)
 
 /*do we really need this? the valid data check should be sufficent -- pierre*/
   /* waits for head to reach scanning position */
-  expected =
-    sanei_genesys_read_reg_from_set (dev->reg,
-				     0x3d) * 65536 +
-    sanei_genesys_read_reg_from_set (dev->reg,
-				     0x3e) * 256 +
-    sanei_genesys_read_reg_from_set (dev->reg, 0x3f);
-  do
+  if (!(dev->model->flags & GENESYS_FLAG_ODD_EVEN_CIS))
     {
-      /* wait 1/10th of second between each test to avoid
-         overloading USB and CPU */
-      usleep (100 * 1000);
-      status = sanei_genesys_read_feed_steps (dev, &steps);
-      if (status != SANE_STATUS_GOOD)
-	{
-	  DBG (DBG_error,
-	       "genesys_start_scan: Failed to read feed steps: %s\n",
-	       sane_strstatus (status));
-	  return status;
-	}
+      expected =
+        sanei_genesys_read_reg_from_set (dev->reg,
+                                         0x3d) * 65536 +
+        sanei_genesys_read_reg_from_set (dev->reg,
+                                         0x3e) * 256 +
+        sanei_genesys_read_reg_from_set (dev->reg, 0x3f);
+      do
+        {
+          /* wait 1/10th of second between each test to avoid
+             overloading USB and CPU */
+          usleep (100 * 1000);
+          status = sanei_genesys_read_feed_steps (dev, &steps);
+          if (status != SANE_STATUS_GOOD)
+            {
+              DBG (DBG_error,
+                   "genesys_start_scan: Failed to read feed steps: %s\n",
+                   sane_strstatus (status));
+              return status;
+            }
+        }
+      while (steps < expected);
     }
-  while (steps < expected);
   
   /* wait for buffers to be filled */
   do
diff --git a/backend/genesys_devices.c b/backend/genesys_devices.c
index 35ff2b5b4..974ff1ef8 100644
--- a/backend/genesys_devices.c
+++ b/backend/genesys_devices.c
@@ -786,7 +786,7 @@ static Genesys_Motor Motor[] = {
    1,   /* maximum power modes count */
    { /* motor slopes */
 	   { /* power mode 0 */
-		   {   2343,   1017, 64, 0.80}, /* full step */
+		   {   2034,   1017, 64, 0.10}, /* full step */
     		   {   4678,   2034, 64, 0.80}, /* half step */
     		   { 3*2712, 3*2712, 64, 0.80}, /* quarter step 0.75*2712 */
     		   /*{ 4*2034, 4*2034, 32, 0.80},  quarter step */
diff --git a/backend/genesys_gl847.c b/backend/genesys_gl847.c
index afa7ab80d..c42ade908 100644
--- a/backend/genesys_gl847.c
+++ b/backend/genesys_gl847.c
@@ -770,7 +770,6 @@ HOME_FREE: 3
      * Z1
      * Z2
  */
-
   r = sanei_genesys_get_address (reg, 0x3d);
   r->value = (feedl >> 16) & 0xf;
   r = sanei_genesys_get_address (reg, 0x3e);
@@ -1122,9 +1121,6 @@ gl847_init_motor_regs_scan (Genesys_Device * dev,
       fast_slope_steps = (feed_steps - (slow_slope_steps >> scan_step_type)) / 2;
     }
 
-  if(fast_slope_steps<64)
-    fast_slope_steps=64;
-
   DBG (DBG_info,
        "gl847_init_motor_regs_scan: Maximum allowed slope steps for fast slope: %d\n",
        fast_slope_steps);
@@ -3436,11 +3432,6 @@ gl847_init_regs_for_scan (Genesys_Device * dev)
       return status;
     }
  
-  /* XXX STEF XXX */
-  RIE (sanei_genesys_read_register (dev, REG6C, &val));
-  val = val & ~REG6C_GPIO13;
-  RIE (sanei_genesys_write_register (dev, REG6C, val));
-
   /* clear scancnt and fedcnt */
   val = REG0D_CLRLNCNT;
   RIE (sanei_genesys_write_register (dev, REG0D, val));
@@ -4107,73 +4098,6 @@ gl847_init_memory_layout (Genesys_Device * dev)
   return status;
 }
 
-#if 0
-/** @brief dummy scan to reset scanner
- *
- * */
-static SANE_Status
-gl847_dummy_scan (Genesys_Device * dev)
-{
-  SANE_Status status;
-  size_t size;
-  uint8_t *line;
-  float pixels;
-  int dpi = 300;
-
-  DBGSTART;
-
-  /* initial calibration reg values */
-  memcpy (dev->calib_reg, dev->reg,
-	  GENESYS_GL847_MAX_REGS * sizeof (Genesys_Register_Set));
-
-  pixels = (16 * 300) / dev->sensor.optical_res;
-  status = gl847_init_scan_regs (dev,
-				 dev->calib_reg,
-				 dpi,
-				 dpi,
-				 0,
-				 0,
-				 pixels,
-				 1,
-				 16,
-				 3,
-				 0,
-				 SCAN_FLAG_DISABLE_SHADING |
-				 SCAN_FLAG_DISABLE_GAMMA |
-				 SCAN_FLAG_SINGLE_LINE |
-				 SCAN_FLAG_IGNORE_LINE_DISTANCE |
-				 SCAN_FLAG_USE_OPTICAL_RES);
-
-  RIE (gl847_bulk_write_register
-       (dev, dev->calib_reg, GENESYS_GL847_MAX_REGS));
-
-  /* colors * bytes_per_color * scan lines */
-  size = ((int) pixels) * 3 * 2 * 1;
-
-  line = malloc (size);
-  if (!line)
-    return SANE_STATUS_NO_MEM;
-
-  DBG (DBG_info, "%s: starting dummy data reading\n", __FUNCTION__);
-
-  RIE (gl847_begin_scan (dev, dev->calib_reg, SANE_TRUE));
-
-  sanei_usb_set_timeout (1000);	/* 1 second */
-
-  /*ignore errors. next read will succeed */
-  sanei_genesys_read_data_from_scanner (dev, line, size);
-
-  sanei_usb_set_timeout (30 * 1000);	/* 30 seconds */
-
-  RIE (gl847_end_scan (dev, dev->calib_reg, SANE_TRUE));
-
-  free (line);
-
-  DBGCOMPLETED;
-  return SANE_STATUS_GOOD;
-}
-#endif
-
 #if 0
 /**
  * reads a register from device and set up corresponding shadow register