diff --git a/driver-klondike.c b/driver-klondike.c
index 797ee377..7dafc1d0 100644
--- a/driver-klondike.c
+++ b/driver-klondike.c
@@ -39,7 +39,7 @@
 
 #define REPLY_SIZE		15	// adequate for all types of replies
 #define REPLY_BUFSIZE 		16	// reply + 1 byte to mark used
-#define MAX_REPLY_COUNT		32	// more unhandled replies than this will result in data loss
+#define MAX_REPLY_COUNT		4096	// more unhandled replies than this will result in data loss
 #define REPLY_WAIT_TIME		100 	// poll interval for a cmd waiting it's reply
 #define CMD_REPLY_RETRIES	8	// how many retries for cmds
 #define MAX_WORK_COUNT		4	// for now, must be binary multiple and match firmware
@@ -120,6 +120,9 @@ static double cvtKlnToC(uint8_t temp)
 {
 	double Rt, stein, celsius;
 
+	if (temp == 0)
+		return 0.0;
+
 	Rt = 1000.0 * 255.0 / (double)temp - 1000.0;
 
 	stein = log(Rt / 2200.0) / 3987.0;
@@ -128,13 +131,39 @@ static double cvtKlnToC(uint8_t temp)
 
 	celsius = (1.0 / stein) - 273.15;
 
+	// For display of bad data
+	if (celsius < 0.0)
+		celsius = 0.0;
+	if (celsius > 200.0)
+		celsius = 200.0;
+
 	return celsius;
 }
 
 static int cvtCToKln(double deg)
 {
-	double R = exp((1/(deg+273.15)-1/(273.15+25))*3987)*2200;
-	return 256*R/(R+1000);
+	double Rt, stein, temp;
+
+	if (deg < 0.0)
+		deg = 0.0;
+
+	stein = 1.0 / (deg + 273.15);
+
+	stein -= 1.0 / (double)(25.0 + 273.15);
+
+	Rt = exp(stein * 3987.0) * 2200.0;
+
+	if (Rt == -1000.0)
+		Rt++;
+
+	temp = 1000.0 * 256.0 / (Rt + 1000.0);
+
+	if (temp > 255)
+		temp = 255;
+	if (temp < 0)
+		temp = 0;
+
+	return (int)temp;
 }
 
 static char *SendCmdGetReply(struct cgpu_info *klncgpu, char Cmd, int device, int datalen, void *data)
@@ -619,7 +648,9 @@ static void get_klondike_statline_before(char *buf, size_t siz, struct cgpu_info
 	struct klondike_info *klninfo = (struct klondike_info *)(klncgpu->device_data);
 	uint8_t temp = 0xFF;
 	uint16_t fan = 0;
+	uint16_t clock = 0;
 	int dev;
+	char tmp[16];
 
 	if (klninfo->status == NULL)
 		return;
@@ -629,11 +660,17 @@ static void get_klondike_statline_before(char *buf, size_t siz, struct cgpu_info
 		if (klninfo->status[dev].temp < temp)
 			temp = klninfo->status[dev].temp;
 		fan += klninfo->cfg[dev].fantarget;
+		clock += klninfo->cfg[dev].hashclock;
 	}
 	fan /= klninfo->status->slavecount+1;
+	clock /= klninfo->status->slavecount+1;
 	rd_unlock(&(klninfo->stat_lock));
 
-	tailsprintf(buf, siz, "     %3.0fC %3d%% | ", cvtKlnToC(temp), fan*100/255);
+	snprintf(tmp, sizeof(tmp), "%2.0fC", cvtKlnToC(temp));
+	if (strlen(tmp) < 4)
+		strcat(tmp, " ");
+
+	tailsprintf(buf, siz, "%3dMHz %3d%% %s| ", (int)clock, fan*100/255, tmp);
 }
 
 static struct api_data *klondike_api_stats(struct cgpu_info *klncgpu)
diff --git a/usbutils.c b/usbutils.c
index 708ebd67..5050ec2f 100644
--- a/usbutils.c
+++ b/usbutils.c
@@ -26,7 +26,9 @@
 			(err) == LIBUSB_TRANSFER_ERROR)
 
 #define NOCONTROLDEV(err) ((err) == LIBUSB_ERROR_NO_DEVICE || \
-			(err) == LIBUSB_ERROR_OTHER)
+			(err) == LIBUSB_ERROR_OTHER || \
+			(err) == LIBUSB_TRANSFER_NO_DEVICE || \
+			(err) == LIBUSB_TRANSFER_ERROR)
 
 /*
  * WARNING - these assume DEVLOCK(cgpu, pstate) is called first and
@@ -2207,7 +2209,7 @@ static void init_usb_transfer(struct usb_transfer *ut)
 	ut->transfer->user_data = ut;
 }
 
-static void LIBUSB_CALL bulk_callback(struct libusb_transfer *transfer)
+static void LIBUSB_CALL transfer_callback(struct libusb_transfer *transfer)
 {
 	struct usb_transfer *ut = transfer->user_data;
 
@@ -2285,7 +2287,7 @@ usb_bulk_transfer(struct libusb_device_handle *dev_handle, int intinfo,
 	mutex_lock(&ut.mutex);
 	/* We give the transfer no timeout since we manage timeouts ourself */
 	libusb_fill_bulk_transfer(ut.transfer, dev_handle, endpoint, buf, length,
-				  bulk_callback, &ut, 0);
+				  transfer_callback, &ut, 0);
 
 	STATS_TIMEVAL(&tv_start);
 	cg_rlock(&cgusb_fd_lock);
@@ -2702,6 +2704,40 @@ out_noerrmsg:
 	return err;
 }
 
+/* As we do for bulk reads, emulate a sync function for control transfers using
+ * our own timeouts that takes the same parameters as libusb_control_transfer.
+ */
+static int usb_control_transfer(libusb_device_handle *dev_handle, uint8_t bmRequestType,
+				uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
+				unsigned char *buffer, uint16_t wLength, unsigned int timeout)
+{
+	struct usb_transfer ut;
+	int err, transferred;
+	unsigned char *buf;
+
+	buf = malloc(70);
+	if (unlikely(!buf))
+		quit(1, "Failed to malloc buf in usb_control_transfer");
+	init_usb_transfer(&ut);
+	mutex_lock(&ut.mutex);
+	libusb_fill_control_setup(buf, bmRequestType, bRequest, wValue,
+				  wIndex, wLength);
+	libusb_fill_control_transfer(ut.transfer, dev_handle, buf, transfer_callback,
+				     &ut, 0);
+	err = libusb_submit_transfer(ut.transfer);
+	if (!err)
+		err = callback_wait(&ut, &transferred, timeout);
+	if (!err && transferred) {
+		unsigned char *ofbuf = libusb_control_transfer_get_data(ut.transfer);
+
+		memcpy(buffer, ofbuf, transferred);
+		return transferred;
+	}
+	if ((err) == LIBUSB_TRANSFER_CANCELLED)
+		err = LIBUSB_ERROR_TIMEOUT;
+	return err;
+}
+
 int __usb_transfer(struct cgpu_info *cgpu, uint8_t request_type, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, uint32_t *data, int siz, unsigned int timeout, __maybe_unused enum usb_cmds cmd)
 {
 	struct cg_usb_device *usbdev;
@@ -2758,7 +2794,7 @@ int __usb_transfer(struct cgpu_info *cgpu, uint8_t request_type, uint8_t bReques
 	}
 	STATS_TIMEVAL(&tv_start);
 	cg_rlock(&cgusb_fd_lock);
-	err = libusb_control_transfer(usbdev->handle, request_type,
+	err = usb_control_transfer(usbdev->handle, request_type,
 		bRequest, wValue, wIndex, buf, (uint16_t)siz, timeout);
 	cg_runlock(&cgusb_fd_lock);
 	STATS_TIMEVAL(&tv_finish);
@@ -2839,7 +2875,7 @@ int _usb_transfer_read(struct cgpu_info *cgpu, uint8_t request_type, uint8_t bRe
 	memset(tbuf, 0, 64);
 	STATS_TIMEVAL(&tv_start);
 	cg_rlock(&cgusb_fd_lock);
-	err = libusb_control_transfer(usbdev->handle, request_type,
+	err = usb_control_transfer(usbdev->handle, request_type,
 		bRequest, wValue, wIndex,
 		tbuf, (uint16_t)bufsiz, timeout);
 	cg_runlock(&cgusb_fd_lock);