diff --git a/src/serial.c b/src/serial.c
index 5a75a4ce4..f7f2fae7e 100644
--- a/src/serial.c
+++ b/src/serial.c
@@ -196,8 +196,9 @@ int HAMLIB_API serial_open(hamlib_port_t *rp)
     /*
      * Open in Non-blocking mode. Watch for EAGAIN errors!
      */
+    rig_debug(RIG_DEBUG_TRACE,"%s: OPEN before\n", __func__);
     fd = OPEN(rp->pathname, O_RDWR | O_NOCTTY | O_NDELAY);
-
+    rig_debug(RIG_DEBUG_TRACE,"%s: OPEN after\n", __func__);
     if (fd == -1)
     {
         /* Could not open the port. */
@@ -211,7 +212,9 @@ int HAMLIB_API serial_open(hamlib_port_t *rp)
 
     rp->fd = fd;
 
+    rig_debug(RIG_DEBUG_TRACE,"%s: serial_setup before\n", __func__);
     err = serial_setup(rp);
+    rig_debug(RIG_DEBUG_TRACE,"%s: serial_setup after\n", __func__);
 
     if (err != RIG_OK)
     {
@@ -219,7 +222,9 @@ int HAMLIB_API serial_open(hamlib_port_t *rp)
         return err;
     }
 
+    rig_debug(RIG_DEBUG_TRACE,"%s: serial_flush before\n", __func__);
     serial_flush(rp); // ensure nothing is there when we open
+    rig_debug(RIG_DEBUG_TRACE,"%s: serial_flush before\n", __func__);
 
     return RIG_OK;
 }
@@ -259,18 +264,22 @@ int HAMLIB_API serial_setup(hamlib_port_t *rp)
      * Get the current options for the port...
      */
 #if defined(HAVE_TERMIOS_H)
+rig_debug(RIG_DEBUG_TRACE,"%s: tcgetattr\n", __func__);
     tcgetattr(fd, &options);
     memcpy(&orig_options, &options, sizeof(orig_options));
 #elif defined(HAVE_TERMIO_H)
+rig_debug(RIG_DEBUG_TRACE,"%s: IOCTL TCGETA\n", __func__);
     IOCTL(fd, TCGETA, &options);
     memcpy(&orig_options, &options, sizeof(orig_options));
 #else   /* sgtty */
+rig_debug(RIG_DEBUG_TRACE,"%s: IOCTL TIOCGETP\n", __func__);
     IOCTL(fd, TIOCGETP, &sg);
     memcpy(&orig_sg, &sg, sizeof(orig_sg));
 #endif
 
 #ifdef HAVE_CFMAKERAW
     /* Set serial port to RAW mode by default. */
+rig_debug(RIG_DEBUG_TRACE,"%s: cfmakeraw\n", __func__);
     cfmakeraw(&options);
 #endif
 
@@ -334,7 +343,9 @@ int HAMLIB_API serial_setup(hamlib_port_t *rp)
     }
 
     /* TODO */
+rig_debug(RIG_DEBUG_TRACE,"%s: cfsetispeed\n", __func__);
     cfsetispeed(&options, speed);
+rig_debug(RIG_DEBUG_TRACE,"%s: cfsetospeed\n", __func__);
     cfsetospeed(&options, speed);
 
     /*
@@ -507,6 +518,7 @@ int HAMLIB_API serial_setup(hamlib_port_t *rp)
      */
 #if defined(HAVE_TERMIOS_H)
 
+rig_debug(RIG_DEBUG_TRACE,"%s: tcsetattr TCSANOW\n", __func__);
     if (tcsetattr(fd, TCSANOW, &options) == -1)
     {
         rig_debug(RIG_DEBUG_ERR,
@@ -520,6 +532,7 @@ int HAMLIB_API serial_setup(hamlib_port_t *rp)
 
 #elif defined(HAVE_TERMIO_H)
 
+rig_debug(RIG_DEBUG_TRACE,"%s: IOCTL TCSETA\n", __func__);
     if (IOCTL(fd, TCSETA, &options) == -1)
     {
         rig_debug(RIG_DEBUG_ERR,
@@ -533,6 +546,7 @@ int HAMLIB_API serial_setup(hamlib_port_t *rp)
 
 #else
 
+rig_debug(RIG_DEBUG_TRACE,"%s: IOCTL TIOCSETP\n", __func__);
     /* sgtty */
     if (IOCTL(fd, TIOCSETP, &sg) == -1)
     {