diff -up hplip-3.12.2/io/hpmud/musb.c.release-usb hplip-3.12.2/io/hpmud/musb.c
--- hplip-3.12.2/io/hpmud/musb.c.release-usb	2012-03-22 09:51:02.651388028 +0000
+++ hplip-3.12.2/io/hpmud/musb.c	2012-03-22 09:51:43.796433071 +0000
@@ -2063,6 +2063,7 @@ int __attribute__ ((visibility ("hidden"
                if (ma.support != HPMUD_SUPPORT_TYPE_HPLIP)
                {
                   BUG("ignoring %s support=%d\n", sz, ma.support);
+                  usb_close(hd);
                   continue;           /* ignor, not supported */
                }