diff --git a/backend/genesys_devices.c b/backend/genesys_devices.c
index bf3733dd2..5c111c801 100644
--- a/backend/genesys_devices.c
+++ b/backend/genesys_devices.c
@@ -439,7 +439,7 @@ static Genesys_Sensor Sensor[] = {
    /* reg 0x10 - 0x15 */
    {0x03, 0x00, 0x02, 0x00, 0x01, 0x80, /* EXPR/EXPG/EXPB */
    /* reg 0x16 - 0x1d */
-    0x10, 0x08, 0x00, 0xff, 0x34, 0x00, 0x02, 0x04 },
+    0x10, 0x08, 0x00, 0x50, 0x34, 0x00, 0x02, 0x04 },
    /* reg 0x52 - 0x5e */
    {0x03, 0x07,
     0x00, 0x00, 0x00, 0x00,
@@ -966,13 +966,12 @@ 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_SKIP_WARMUP
     | GENESYS_FLAG_OFFSET_CALIBRATION
     | GENESYS_FLAG_DARK_CALIBRATION
     | GENESYS_FLAG_CUSTOM_GAMMA,
   GENESYS_HAS_SCAN_SW | GENESYS_HAS_COPY_SW | GENESYS_HAS_EMAIL_SW | GENESYS_HAS_FILE_SW,
-  150,
+  50,
   400
 };
 
diff --git a/backend/genesys_gl847.c b/backend/genesys_gl847.c
index fa3d314bc..599c1ee0d 100644
--- a/backend/genesys_gl847.c
+++ b/backend/genesys_gl847.c
@@ -1484,6 +1484,7 @@ gl847_init_optical_regs_scan (Genesys_Device * dev,
 
   r = sanei_genesys_get_address (reg, 0x19);
   r->value = 0xff;
+  r->value = 0x50; /* XXX STEF XXX */
 
   /* BW threshold */
   r = sanei_genesys_get_address (reg, 0x2e);
@@ -2325,6 +2326,7 @@ gl847_set_lamp_power (Genesys_Device * dev,
 	}
       r = sanei_genesys_get_address (regs, 0x19);
       r->value = 0x50;
+      r->value = 0x50; /* XXX STEF XXX */
     }
   else
     {
@@ -2340,6 +2342,7 @@ gl847_set_lamp_power (Genesys_Device * dev,
 	}
       r = sanei_genesys_get_address (regs, 0x19);
       r->value = 0xff;
+      r->value = 0x50; /* XXX STEF XXX */
     }
 }
 
@@ -3654,18 +3657,6 @@ gl847_led_calibration (Genesys_Device * dev)
 
   DBG (DBG_proc, "gl847_led_calibration\n");
 
-  /* move to white strip */
-  /* XXX STEF XXX
-  status = gl847_feed (dev, 280); */
-
-  if (status != SANE_STATUS_GOOD)
-    {
-      DBG (DBG_error,
-	   "gl847_led_calibration: failed to feed: %s\n",
-	   sane_strstatus (status));
-      return status;
-    }
-
   /* offset calibration is always done in color mode */
   channels = 3;