diff --git a/backend/genesys_devices.c b/backend/genesys_devices.c
index 31a5d3b2c..f198979ba 100644
--- a/backend/genesys_devices.c
+++ b/backend/genesys_devices.c
@@ -437,7 +437,7 @@ static Genesys_Sensor Sensor[] = {
    200,
    {0x00, 0x00, 0x00, 0x00},
    /* reg 0x10 - 0x1d */
-   {0x03, 0x48, 0x01, 0xff, 0x01, 0x7d, /* EXPR/EXPG/EXPB */
+   {0x01, 0x80, 0x01, 0x80, 0x01, 0x80, /* EXPR/EXPG/EXPB */
     0x10, 0x08, 0x00, 0xff, 0x34, 0x00, 0x02, 0x04 },
    /* reg 0x52 - 0x5e */
    {0x03, 0x07,
@@ -787,10 +787,10 @@ static Genesys_Motor Motor[] = {
 	   { /* power mode 0 */
 		   {   2343,   1017, 32, 0.80}, /* full step */
     		   {   4678,   2034, 16, 0.80}, /* half step */
-    		   { 4*2034, 4*2034, 32, 0.80}, /* quarter step */
-		   /* extra values kept for documentation */
-		   {   2343,    864, 32, 0.80}, /* full step */
-    		   { 2*1171,  2*648, 32, 0.80}, /* half step */
+    		   { 4*2034, 4*2034, 16, 0.80}, /* quarter step */
+		   /* extra values kept for documentation   
+		   {   2343,    864, 32, 0.80},    full step   
+    		   { 2*1171,  2*648, 32, 0.80},    half step */
 	   },
     },
   },
@@ -935,7 +935,7 @@ static Genesys_Model canon_lide_100_model = {
   {16, 8, 0},			/* possible depths in color mode */
 
   SANE_FIX (6.42),		/* Start of scan area in mm (x) */
-  SANE_FIX (10.0),		/* Start of scan area in mm (y) */
+  SANE_FIX (0.0),		/* Start of scan area in mm (y) */
   SANE_FIX (217.44),		/* Size of scan area in mm (x) */
   SANE_FIX (299.0),		/* Size of scan area in mm (y) */
 
@@ -965,7 +965,7 @@ static Genesys_Model canon_lide_100_model = {
   GPO_CANONLIDE200,
   MOTOR_CANONLIDE100,
   GENESYS_FLAG_LAZY_INIT 	/* Which flags are needed for this scanner? */
-    | GENESYS_FLAG_NO_CALIBRATION
+    | GENESYS_FLAG_NO_CALIBRATION 
     | GENESYS_FLAG_SKIP_WARMUP
     | GENESYS_FLAG_OFFSET_CALIBRATION
     | GENESYS_FLAG_DARK_WHITE_CALIBRATION
@@ -982,9 +982,8 @@ static Genesys_Model canon_lide_200_model = {
   GENESYS_GL847,
   NULL,
 
-  /* XXX STEF XXX add 75 dpi mode at least, look at 2400 for motor */
-  {1200, 600, 300, 150, 0},	/* possible x-resolutions */
-  {1200, 600, 300, 150, 0},	/* possible y-resolutions */
+  {1200, 600, 300, 150, 75, 0},	/* possible x-resolutions */
+  {1200, 600, 300, 150, 75, 0},	/* possible y-resolutions */
   {16, 8, 0},			/* possible depths in gray mode */
   {16, 8, 0},			/* possible depths in color mode */
 
diff --git a/backend/genesys_gl847.c b/backend/genesys_gl847.c
index bab315f2c..42d08d450 100644
--- a/backend/genesys_gl847.c
+++ b/backend/genesys_gl847.c
@@ -4087,8 +4087,9 @@ static SANE_Status gl847_dummy_scan(Genesys_Device *dev)
   size_t size;
   uint8_t *line;
   float pixels;
+  int dpi=300;
 
-  DBG (DBG_proc, "%s start\n", __FUNCTION__);
+  DBGSTART;
 
   /* initial calibration reg values */
   memcpy (dev->calib_reg, dev->reg, GENESYS_GL847_MAX_REGS * sizeof (Genesys_Register_Set));
@@ -4096,8 +4097,8 @@ static SANE_Status gl847_dummy_scan(Genesys_Device *dev)
   pixels= (16 * 300) / dev->sensor.optical_res;
   status = gl847_init_scan_regs (dev,
 				 dev->calib_reg,
-				 300,
-				 300,
+				 dpi,
+				 dpi,
 				 0,
 				 0,
 				 pixels,
@@ -4122,8 +4123,8 @@ static SANE_Status gl847_dummy_scan(Genesys_Device *dev)
   if (!line)
     return SANE_STATUS_NO_MEM;
 
-  DBG (DBG_info,
-       "gl847_init: starting dummy data reading\n");
+  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*/
@@ -4137,7 +4138,7 @@ static SANE_Status gl847_dummy_scan(Genesys_Device *dev)
 
   free(line);
 
-  DBG (DBG_proc, "%s completed\n", __FUNCTION__);
+  DBGCOMPLETED;
   return SANE_STATUS_GOOD;
 }
 
@@ -4330,7 +4331,7 @@ gl847_init (Genesys_Device * dev)
     }
 
   /* to clear error condition on scan */
-  /* gl847_dummy_scan(dev); */
+  gl847_dummy_scan(dev);
 
   memcpy (dev->calib_reg, dev->reg,
 	  GENESYS_GL847_MAX_REGS * sizeof (Genesys_Register_Set));
diff --git a/backend/genesys_gl847.h b/backend/genesys_gl847.h
index 2d3166225..e9ed88149 100644
--- a/backend/genesys_gl847.h
+++ b/backend/genesys_gl847.h
@@ -62,6 +62,9 @@
 #include "../include/_stdint.h"
 #include "genesys.h"
 
+#define DBGSTART DBG (DBG_proc, "%s start\n", __FUNCTION__);
+#define DBGCOMPLETED DBG (DBG_proc, "%s completed\n", __FUNCTION__);
+
 #define REG01           0x01
 #define REG01_CISSET	0x80
 #define REG01_DOGENB	0x40