diff --git a/docs/man/bcmxcp_usb.txt b/docs/man/bcmxcp_usb.txt
index 1581f51dd4..87670d6178 100644
--- a/docs/man/bcmxcp_usb.txt
+++ b/docs/man/bcmxcp_usb.txt
@@ -38,20 +38,10 @@ linkman:ups.conf[5].
 The number of seconds that the UPS should wait between receiving the
 shutdown command and actually shutting off.
 
-NOTE: This driver does not currently support USB-matching settings common
-to other drivers, such as *vendor*, *vendorid*, *product*, *productid*,
-*serial*, *device* or *bus*.
-
-////////
-The note above may be addressed by
-https://github.com/networkupstools/nut/issues/1764
-When that happens, replace it by the following lines:
-
 USB INTERFACE ONLY
 ~~~~~~~~~~~~~~~~~~
 
 include::nut_usb_addvars.txt[]
-////////
 
 DEFAULT VALUES FOR THE EXTRA ARGUMENTS
 --------------------------------------
diff --git a/drivers/bcmxcp.c b/drivers/bcmxcp.c
index efb108f3dd..15d7a2e8a0 100644
--- a/drivers/bcmxcp.c
+++ b/drivers/bcmxcp.c
@@ -116,7 +116,7 @@ TODO List:
 #include "bcmxcp.h"
 
 #define DRIVER_NAME	"BCMXCP UPS driver"
-#define DRIVER_VERSION	"0.39"
+#define DRIVER_VERSION	"0.40"
 
 #define MAX_NUT_NAME_LENGTH 128
 #define NUT_OUTLET_POSITION   7
@@ -135,7 +135,7 @@ upsdrv_info_t upsdrv_info = {
 	"Alf Høgemark <alf@i100>\n" \
 	"Gavrilov Igor",
 	DRV_STABLE,
-	{ &comm_upsdrv_info, NULL }
+	{ &bcmxcp_comm_upsdrv_info, NULL }
 };
 
 static uint16_t get_word(const unsigned char*);
@@ -2226,15 +2226,16 @@ void upsdrv_tweak_prognames(void)
 {
 }
 
-/* list flags and values that you want to receive via -x */
-void upsdrv_makevartable(void)
+/* list flags and values that you want to receive via -x
+ * or ups.conf to all bcmxcp* family of drivers
+ */
+void bcmxcp_makevartable(void)
 {
 	/* NOTE: The USB variant of this driver currently does not
 	 * involve nut_usb_addvars() method like others do. When
 	 * fixing, see also tools/nut-scanner/scan_usb.c "exceptions".
 	 */
 	addvar(VAR_VALUE, "shutdown_delay", "Specify shutdown delay (seconds)");
-	addvar(VAR_VALUE, "baud_rate", "Specify communication speed (ex: 9600)");
 }
 
 int setvar (const char *varname, const char *val)
diff --git a/drivers/bcmxcp.h b/drivers/bcmxcp.h
index 054dce2466..e3a235c25f 100644
--- a/drivers/bcmxcp.h
+++ b/drivers/bcmxcp.h
@@ -622,4 +622,6 @@ typedef enum ebool { FALSE, TRUE } bool_t;
 typedef int bool_t;
 #endif
 
+void bcmxcp_makevartable(void);
+
 #endif	/* NUT_BCMXCP_H_SEEN */
diff --git a/drivers/bcmxcp_io.h b/drivers/bcmxcp_io.h
index 5293e0500a..bd8200ff93 100644
--- a/drivers/bcmxcp_io.h
+++ b/drivers/bcmxcp_io.h
@@ -17,6 +17,6 @@ void upsdrv_cleanup(void);
 void upsdrv_reconnect(void);
 void upsdrv_comm_good(void);
 
-extern upsdrv_info_t comm_upsdrv_info;
+extern upsdrv_info_t bcmxcp_comm_upsdrv_info;
 
 #endif  /* BCMXCP_IO__ */
diff --git a/drivers/bcmxcp_ser.c b/drivers/bcmxcp_ser.c
index 959ac847ac..08f26c8446 100644
--- a/drivers/bcmxcp_ser.c
+++ b/drivers/bcmxcp_ser.c
@@ -6,10 +6,10 @@
 #include "nut_stdint.h"
 
 #define SUBDRIVER_NAME    "RS-232 communication subdriver"
-#define SUBDRIVER_VERSION "0.22"
+#define SUBDRIVER_VERSION "0.23"
 
 /* communication driver description structure */
-upsdrv_info_t comm_upsdrv_info = {
+upsdrv_info_t bcmxcp_comm_upsdrv_info = {
 	SUBDRIVER_NAME,
 	SUBDRIVER_VERSION,
 	NULL,
@@ -410,6 +410,13 @@ static void pw_comm_setup(const char *port)
 # pragma GCC diagnostic pop
 #endif
 
+void upsdrv_makevartable(void)
+{
+	bcmxcp_makevartable();
+
+	addvar(VAR_VALUE, "baud_rate", "Specify communication speed (ex: 9600)");
+}
+
 void upsdrv_initups(void)
 {
 	upsfd = ser_open(device_path);
diff --git a/drivers/bcmxcp_usb.c b/drivers/bcmxcp_usb.c
index aed7f22842..dea3b5af90 100644
--- a/drivers/bcmxcp_usb.c
+++ b/drivers/bcmxcp_usb.c
@@ -2,6 +2,7 @@
 #include "bcmxcp.h"
 #include "bcmxcp_io.h"
 #include "common.h"
+#include "nut_libusb.h"
 #include "usb-common.h"
 #include "timehead.h"
 #include "nut_stdint.h" /* for uint16_t */
@@ -11,10 +12,13 @@
 #include <unistd.h>
 
 #define SUBDRIVER_NAME    "USB communication subdriver"
-#define SUBDRIVER_VERSION "0.28"
+#define SUBDRIVER_VERSION "0.29"
 
-/* communication driver description structure */
-upsdrv_info_t comm_upsdrv_info = {
+/* communication driver description structure
+ * NOTE: Renamed from comm_upsdrv_info to avoid conflict
+ *  with that defined in libusb{0,1}.c
+ */
+upsdrv_info_t bcmxcp_comm_upsdrv_info = {
 	SUBDRIVER_NAME,
 	SUBDRIVER_VERSION,
 	NULL,
@@ -367,6 +371,14 @@ void upsdrv_comm_good(void)
 	nutusb_comm_good();
 }
 
+void upsdrv_makevartable(void)
+{
+	bcmxcp_makevartable();
+
+	/* allow -x vendor=X, vendorid=X, product=X, productid=X, serial=X */
+	nut_usb_addvars();
+}
+
 void upsdrv_initups(void)
 {
 	upsdev = nutusb_open("USB");
diff --git a/drivers/usb-common.c b/drivers/usb-common.c
index 4834714cc8..7a7051c02e 100644
--- a/drivers/usb-common.c
+++ b/drivers/usb-common.c
@@ -26,26 +26,39 @@ int is_usb_device_supported(usb_device_id_t *usb_device_id_list, USBDevice_t *de
 	int retval = NOT_SUPPORTED;
 	usb_device_id_t *usbdev;
 
+	upsdebugx(3, "%s: checking if this driver can support USB device VID:PID 0x%04X:0x%04X",
+		__func__, (unsigned int)device->VendorID, (unsigned int)device->ProductID);
+
 	for (usbdev = usb_device_id_list;
 	     (usbdev->vendorID != 0 || usbdev->productID != 0 || usbdev->fun != NULL);
 	     usbdev++
 	) {
+		upsdebugx(4, "%s: checking table entry for VID:PID 0x%04X:0x%04X "
+			"(custom init handler is%s available)",
+			__func__, (unsigned int)usbdev->vendorID,
+			(unsigned int)usbdev->productID,
+			(usbdev->fun == NULL ? " NOT" : ""));
+
 		if (usbdev->vendorID != device->VendorID) {
+			upsdebugx(4, "%s: NOT_SUPPORTED: vendor ID mismatch", __func__);
 			continue;
 		}
 
 		/* flag as possibly supported if we see a known vendor */
 		retval = POSSIBLY_SUPPORTED;
 
+		upsdebugx(4, "%s: POSSIBLY_SUPPORTED: known vendor ID at least", __func__);
 		if (usbdev->productID != device->ProductID) {
 			continue;
 		}
 
 		/* call the specific handler, if it exists */
 		if (usbdev->fun != NULL) {
+			upsdebugx(4, "%s: call the custom init handler", __func__);
 			(*usbdev->fun)(device);
 		}
 
+		upsdebugx(4, "%s: SUPPORTED: known vendor and product IDs", __func__);
 		return SUPPORTED;
 	}
 
diff --git a/tools/nut-scanner/Makefile.am b/tools/nut-scanner/Makefile.am
index de6e57af10..b119ddddd1 100644
--- a/tools/nut-scanner/Makefile.am
+++ b/tools/nut-scanner/Makefile.am
@@ -89,6 +89,23 @@ lib_LTLIBRARIES =
 include_HEADERS =
 dist_noinst_HEADERS =
 
+# Separate the .deps of other dirs from this one
+# NOTE: Not using "$<" due to a legacy Sun/illumos dmake bug with resolver
+# of dynamic vars, see e.g. https://man.omnios.org/man1/make#BUGS
+LINKED_SOURCE_FILES = serial.c
+serial.c: $(top_srcdir)/drivers/serial.c
+	test -s "$@" || ln -s -f "$(top_srcdir)/drivers/serial.c" "$@"
+
+LINKED_SOURCE_FILES += bcmxcp_ser.c bcmxcp.c
+bcmxcp_ser.c: $(top_srcdir)/drivers/bcmxcp_ser.c
+	test -s "$@" || ln -s -f "$(top_srcdir)/drivers/bcmxcp_ser.c" "$@"
+
+bcmxcp.c: $(top_srcdir)/drivers/bcmxcp.c
+	test -s "$@" || ln -s -f "$(top_srcdir)/drivers/bcmxcp.c" "$@"
+
+CLEANFILES += $(LINKED_SOURCE_FILES)
+BUILT_SOURCES += $(LINKED_SOURCE_FILES)
+
 # Note: we only build nut-scanner, and its library, if libltdl was found (required ATM!)
 if WITH_NUT_SCANNER
  bin_PROGRAMS += nut-scanner
diff --git a/tools/nut-scanner/scan_eaton_serial.c b/tools/nut-scanner/scan_eaton_serial.c
index 1401dd42ac..a803490d7c 100644
--- a/tools/nut-scanner/scan_eaton_serial.c
+++ b/tools/nut-scanner/scan_eaton_serial.c
@@ -127,6 +127,14 @@ unsigned char calc_checksum(const unsigned char *buf)
 	return c;
 }
 
+void addvar(int vartype, const char *name, const char *desc) {
+	NUT_UNUSED_VARIABLE(vartype);
+	NUT_UNUSED_VARIABLE(name);
+	NUT_UNUSED_VARIABLE(desc);
+}
+
+void bcmxcp_makevartable(void) {}
+
 /*******************************************************************************
  * SHUT functions (MGE legacy, but Eaton path forward)
  ******************************************************************************/