Stefan Fiedler:

package/praenti/cups/cups.conf

@@ -22,11 +22,15 @@
 
 cups_pm(){
 	install_init cups $confdir/cups.init
+
+	# Run usb backend as root so it is allowed to access printer device files
+	chmod 700 $root/usr/lib/cups/backend/usb
 }
 
 if [ "${ROCKCFG_X86_BITS}" = "64" ] ; then
 	var_append patchfiles ' ' "$base/package/praenti/cups/hotfix.diff_x86_64"
 fi
+
 var_append extraconfopt " " "--with-cups-user=daemon --with-cups-group=daemon"
 
 # Force same compiler version for C and C++