diff -up hplip-2.7.9/data/rules/55-hpmud.rules.udev-rules hplip-2.7.9/data/rules/55-hpmud.rules
--- hplip-2.7.9/data/rules/55-hpmud.rules.udev-rules	2007-10-03 10:36:09.000000000 +0100
+++ hplip-2.7.9/data/rules/55-hpmud.rules	2007-10-03 10:41:28.000000000 +0100
@@ -1,18 +1,20 @@
 # Udev rules file for HP printer products.
 
 ACTION!="add", GOTO="hpmud_rules_end"
-SUBSYSTEM=="ppdev", OWNER="lp", GROUP="lp", MODE="0666"
-SUBSYSTEM!="usb_device", GOTO="hpmud_rules_end"
+SUBSYSTEM=="ppdev", GROUP="lp", MODE="0664"
+SUBSYSTEM!="usb", GOTO="hpmud_rules_end"
+ATTR{devnum}!="?*", GOTO="hpmud_rules_end"
+ATTR{busnum}!="?*", GOTO="hpmud_rules_end"
 
 # Check for AiO products (0x03f0xx11).
-SYSFS{idVendor}=="03f0", SYSFS{idProduct}=="??11", OWNER="lp", GROUP="lp", MODE="0666"
+SYSFS{idVendor}=="03f0", SYSFS{idProduct}=="??11", GROUP="lp", MODE="0664"
 # Check for Photosmart products (0x03f0xx02).
-SYSFS{idVendor}=="03f0", SYSFS{idProduct}=="??02", OWNER="lp", GROUP="lp", MODE="0666"
+SYSFS{idVendor}=="03f0", SYSFS{idProduct}=="??02", GROUP="lp", MODE="0664"
 # Check for Business Inkjet products (0x03f0xx12).
-SYSFS{idVendor}=="03f0", SYSFS{idProduct}=="??12", OWNER="lp", GROUP="lp", MODE="0666"
+SYSFS{idVendor}=="03f0", SYSFS{idProduct}=="??12", GROUP="lp", MODE="0664"
 # Check for Deskjet products (0x03f0xx04).
-SYSFS{idVendor}=="03f0", SYSFS{idProduct}=="??04", OWNER="lp", GROUP="lp", MODE="0666"
+SYSFS{idVendor}=="03f0", SYSFS{idProduct}=="??04", GROUP="lp", MODE="0664"
 # Check for LaserJet products (0x03f0xx17).
-SYSFS{idVendor}=="03f0", SYSFS{idProduct}=="??17", OWNER="lp", GROUP="lp", MODE="0666"
+SYSFS{idVendor}=="03f0", SYSFS{idProduct}=="??17", GROUP="lp", MODE="0664"
 
 LABEL="hpmud_rules_end"