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diff -up cups-1.4.3/backend/snmp-supplies.c.snmp-quirks cups-1.4.3/backend/snmp-supplies.c
--- cups-1.4.3/backend/snmp-supplies.c.snmp-quirks	2009-11-20 01:27:57.000000000 +0000
+++ cups-1.4.3/backend/snmp-supplies.c	2010-04-13 11:54:13.508023630 +0100
@@ -38,6 +38,15 @@
 
 
 /*
+ * Printer quirks...
+ */
+
+/* The prtMarkerSuppliesLevel values are percentages, not levels
+ * relative to the stated capacity. */
+#define QUIRK_LEVEL_IS_PERCENTAGE	(1<<0)
+
+
+/*
  * Local structures...
  */
 
@@ -57,6 +66,12 @@ typedef struct				/**** Printer state ta
   const char	*keyword;		/* IPP printer-state-reasons keyword */
 } backend_state_t;
 
+typedef struct				/**** Printer quirk table ****/
+{
+  const char	*description;		/* hrDeviceDescr */
+  int		quirks;			/* quirks (bitmask) */
+} printer_quirk_t;
+
 
 /*
  * Local globals...
@@ -68,6 +83,7 @@ static int		current_state = -1;
 static int		charset = -1;	/* Character set for supply names */
 static int		num_supplies = 0;
 					/* Number of supplies found */
+static int		quirks = 0;	/* Printer quirks */
 static backend_supplies_t supplies[CUPS_MAX_SUPPLIES];
 					/* Supply information */
 
@@ -153,6 +169,11 @@ static const backend_state_t const print
 			  { CUPS_TC_outputFull, "output-area-full-warning" }
 			};
 
+static const printer_quirk_t const printer_quirks[] =
+			{
+			  { "Officejet Pro 8500 A909g", QUIRK_LEVEL_IS_PERCENTAGE }
+			};
+
 
 /*
  * Local functions...
@@ -208,6 +229,9 @@ backendSNMPSupplies(
       if (i)
         *ptr++ = ',';
 
+      if (quirks & QUIRK_LEVEL_IS_PERCENTAGE)
+	supplies[i].max_capacity = 100;
+
       if (supplies[i].max_capacity > 0)
         sprintf(ptr, "%d", 100 * supplies[i].level / supplies[i].max_capacity);
       else
@@ -366,6 +390,7 @@ backend_init_supplies(
   current_state = -1;
   num_supplies  = -1;
   charset       = -1;
+  quirks	= 0;
 
   memset(supplies, 0, sizeof(supplies));
 
@@ -404,6 +429,15 @@ backend_init_supplies(
 
   fprintf(stderr, "DEBUG2: hrDeviceDesc=\"%s\"\n", description);
 
+  for (i = 0; i < sizeof (printer_quirks) / sizeof (printer_quirks[0]); i++)
+  {
+    if (!strcmp (description, printer_quirks[i].description))
+    {
+      quirks = printer_quirks[i].quirks;
+      break;
+    }
+  }
+
  /*
   * See if we have already queried this device...
   */