diff -aurN a/plugins/linear.c b/plugins/linear.c
--- a/plugins/linear.c	2013-08-08 02:23:04.000000000 +0200
+++ b/plugins/linear.c	2015-09-04 20:21:50.376205701 +0200
@@ -187,11 +187,11 @@
 		for (index = 0; index < 7; index++)
 			if (fscanf(pcal_fd, "%d", &lin->a[index]) != 1) break;
 		fscanf(pcal_fd, "%d %d", &lin->cal_res_x, &lin->cal_res_y);
-#ifdef DEBUG
+/*#ifdef DEBUG*/
 		printf("Linear calibration constants: ");
 		for(index=0;index<7;index++) printf("%d ",lin->a[index]);
 		printf("\n");
-#endif /*DEBUG*/
+/*#endif*/ /*DEBUG*/
 		fclose(pcal_fd);
 	}