diff --git a/cdrskin/cdrskin.c b/cdrskin/cdrskin.c
index 006fab7..ec2d35e 100644
--- a/cdrskin/cdrskin.c
+++ b/cdrskin/cdrskin.c
@@ -2297,6 +2297,9 @@ int Cdrskin_grab_drive(struct CdrskiN *skin, int flag)
      ClN(fprintf(stderr,
                  "cdrskin_debug: Cdrskin_grab_drive() on active libburn\n"));
    if(strlen(skin->preskin->device_adr)<=0) {
+
+     /* >>> forget unwanted drives here ! */;
+
      ret= Cdrskin_reinit_lib_with_adr(skin,1|(flag&2));
      goto ex; /* this calls Cdrskin_grab() with persistent address or fails */
    }
@@ -2810,9 +2813,9 @@ int Cdrskin_atip(struct CdrskiN *skin, int flag)
    return(ret);
  drive= skin->drives[skin->driveno].drive;
  while(burn_drive_get_status(drive,NULL))
-   sleep(2);
+   usleep(100002);
  while ((s = burn_disc_get_status(drive)) == BURN_DISC_UNREADY)
-   sleep(2);
+   usleep(100002);
  Cdrskin_report_disc_status(skin,s,0);
  if(s==BURN_DISC_APPENDABLE && skin->no_blank_appendable) {
    is_not_really_erasable= 1;
@@ -2864,7 +2867,8 @@ int Cdrskin_atip(struct CdrskiN *skin, int flag)
  } 
  if(strlen(skin->preskin->device_adr)>0)
    burn_drive_add_whitelist(skin->preskin->device_adr);
- while (!burn_drive_scan(&(skin->drives), &(skin->n_drives))) ;
+ while(!burn_drive_scan(&(skin->drives),&(skin->n_drives)))
+   usleep(1002);
  ret= Cdrskin_grab_drive(skin,0);
  if(ret<=0)
    return(ret);
@@ -2960,9 +2964,9 @@ int Cdrskin_blank(struct CdrskiN *skin, int flag)
  drive= skin->drives[skin->driveno].drive;
 
  while(burn_drive_get_status(drive,NULL))
-   sleep(2);
+   usleep(100002);
  while ((s = burn_disc_get_status(drive)) == BURN_DISC_UNREADY)
-   sleep(2);
+   usleep(100002);
  if(skin->verbosity>=Cdrskin_verbose_progresS)
    Cdrskin_report_disc_status(skin,s,0);
  if(s!=BURN_DISC_FULL && 
@@ -3341,10 +3345,10 @@ int Cdrskin_burn(struct CdrskiN *skin, int flag)
  drive= skin->drives[skin->driveno].drive;
 
  while (burn_drive_get_status(drive, NULL))
-   sleep(2); /* >>> ??? add a timeout ? */
+   usleep(100002); /* >>> ??? add a timeout ? */
 
  while ((s = burn_disc_get_status(drive)) == BURN_DISC_UNREADY)
-   sleep(2); /* >>> ??? add a timeout ? */
+   usleep(100002); /* >>> ??? add a timeout ? */
 
  if(skin->verbosity>=Cdrskin_verbose_progresS)
    Cdrskin_report_disc_status(skin,s,0);
diff --git a/libburn/drive.c b/libburn/drive.c
index adbcef5..92f85c3 100644
--- a/libburn/drive.c
+++ b/libburn/drive.c
@@ -626,7 +626,8 @@ int burn_drive_scan_and_grab(struct burn_drive_info *drive_infos[], char* adr,
 	fprintf(stderr,"libburn: experimental: burn_drive_scan_and_grab(%s)\n",
 		adr);
 */
-	while (!burn_drive_scan(drive_infos, &n_drives));
+	while (!burn_drive_scan(drive_infos, &n_drives))
+		usleep(1002);
 	if (n_drives <= 0)
 		return 0;
 /*
diff --git a/test/libburner.c b/test/libburner.c
index 99fe844..392ab6e 100644
--- a/test/libburner.c
+++ b/test/libburner.c
@@ -162,7 +162,8 @@ int libburner_aquire_by_driveno(int *driveno)
 	int ret, i;
 
 	printf("Beginning to scan for devices ...\n");
-	while (!burn_drive_scan(&drive_list, &drive_count)) ;
+	while (!burn_drive_scan(&drive_list, &drive_count))
+		usleep(1002);
 	if (drive_count <= 0 && *driveno >= 0) {
 		printf("FAILED (no drives found)\n");
 		return 0;
@@ -433,7 +434,8 @@ int libburner_payload(struct burn_drive *drive, const char *source_adr,
 	burn_disc_write(burn_options, target_disc);
 
 	burn_write_opts_free(burn_options);
-	while (burn_drive_get_status(drive, NULL) == BURN_DRIVE_SPAWNING) ;
+	while (burn_drive_get_status(drive, NULL) == BURN_DRIVE_SPAWNING)
+		usleep(1002);
 	while (burn_drive_get_status(drive, &progress)) {
 		if( progress.sectors <= 0 || progress.sector == last_sector)
 			printf(
diff --git a/test/testburner.c b/test/testburner.c
index 52773d7..7093002 100644
--- a/test/testburner.c
+++ b/test/testburner.c
@@ -260,7 +260,8 @@ int libburner_aquire_by_driveno(int *driveno)
 	int ret= 0, i;
 
 	printf("Beginning to scan for devices ...\n");
-	while (!burn_drive_scan(&drive_list, &drive_count)) ;
+	while (!burn_drive_scan(&drive_list, &drive_count))
+		usleep(1002);
 	if (drive_count <= 0  && *driveno >= 0) {
 		printf("FAILED (no drives found)\n");
 		return 0;
@@ -537,7 +538,8 @@ int libburner_payload(struct burn_drive *drive, const char *source_adr,
 	burn_disc_write(burn_options, target_disc);
 
 	burn_write_opts_free(burn_options);
-	while (burn_drive_get_status(drive, NULL) == BURN_DRIVE_SPAWNING) ;
+	while (burn_drive_get_status(drive, NULL) == BURN_DRIVE_SPAWNING)
+		usleep(1002);
 	while (burn_drive_get_status(drive, &progress)) {
 		if( progress.sectors <= 0 || progress.sector == last_sector)
 			printf(