Index: usb-devel/drivers/hid/hid-core.c
===================================================================
--- usb-devel.orig/drivers/hid/hid-core.c
+++ usb-devel/drivers/hid/hid-core.c
@@ -1055,8 +1055,13 @@ static void hid_apply_multiplier(struct
 	 */
 	multiplier_collection = &hid->collection[multiplier->usage->collection_index];
 	while (multiplier_collection->parent_idx != -1 &&
-	       multiplier_collection->type != HID_COLLECTION_LOGICAL)
+	       multiplier_collection->type != HID_COLLECTION_LOGICAL) {
+		hid_info(hid, "collection %d %px parent %d\n",
+	multiplier_collection - hid->collection, multiplier_collection,
+	multiplier_collection->parent_idx);
 		multiplier_collection = &hid->collection[multiplier_collection->parent_idx];
+	}
+	hid_info(hid, "Got collection\n");
 
 	effective_multiplier = hid_calculate_multiplier(hid, multiplier);
 
@@ -1069,6 +1074,7 @@ static void hid_apply_multiplier(struct
 						      effective_multiplier);
 		}
 	}
+	hid_info(hid, "Applied multiplier\n");
 }
 
 /*
@@ -1103,16 +1109,23 @@ void hid_setup_resolution_multiplier(str
 
 	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
 	list_for_each_entry(rep, &rep_enum->report_list, list) {
+		hid_info(hid, "Start report %px maxfield %d\n",
+	rep, rep->maxfield);
 		for (i = 0; i < rep->maxfield; i++) {
 			/* Ignore if report count is out of bounds. */
 			if (rep->field[i]->report_count < 1)
 				continue;
 
+			hid_info(hid, "Field %d %px maxusage %d\n",
+	i, rep->field[i], rep->field[i]->maxusage);
 			for (j = 0; j < rep->field[i]->maxusage; j++) {
 				usage = &rep->field[i]->usage[j];
-				if (usage->hid == HID_GD_RESOLUTION_MULTIPLIER)
+				if (usage->hid == HID_GD_RESOLUTION_MULTIPLIER) {
+					hid_info(hid, "Usage %d %px\n",
+	j, usage);
 					hid_apply_multiplier(hid,
 							     rep->field[i]);
+				}
 			}
 		}
 	}