diff -urN oldtree/drivers/acpi/ibm_acpi.c newtree/drivers/acpi/ibm_acpi.c
--- oldtree/drivers/acpi/ibm_acpi.c	2006-08-08 16:21:11.000000000 -0400
+++ newtree/drivers/acpi/ibm_acpi.c	2006-08-08 16:27:06.000000000 -0400
@@ -1293,28 +1293,46 @@
 	if (!thermal_tmp_supported)
 		len += sprintf(p + len, "temperatures:\tnot supported\n");
 	else {
-		int i, t;
+		int i;
 		char tmpi[] = "TMPi";
-		s8 tmp[8];
+		/* 
+		 * A few ThinkPads (e.g. R52, T43) have 3 unnamed sensors. We
+		 * want their values as well.
+		 */
+		static const size_t named_count = 8;
+		static const size_t unnamed_count = 3;
+		static const size_t unnamed_addresses[] = { 0xC0, 0xC1, 0xC2 };
+		static const size_t total_count = named_count + unnamed_count;
+		s8 tmp[total_count];
 
 		if (thermal_updt_supported)
 			if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
 				return -EIO;
 
-		for (i = 0; i < 8; i++) {
+		for (i = 0; i < named_count; i++) {
+			int t;
 			tmpi[3] = '0' + i;
 			if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
 				return -EIO;
-			if (thermal_updt_supported)
-				tmp[i] = (t - 2732 + 5) / 10;
-			else
-				tmp[i] = t;
+			tmp[i] = (s8)t;
 		}
 
-		len += sprintf(p + len,
-			       "temperatures:\t%d %d %d %d %d %d %d %d\n",
-			       tmp[0], tmp[1], tmp[2], tmp[3],
-			       tmp[4], tmp[5], tmp[6], tmp[7]);
+		for (i = 0; i < unnamed_count; ++i) {
+			size_t address = unnamed_addresses[i];
+			u8 t;
+			if (!acpi_ec_read(address, &t))
+				return -EIO;
+			tmp[i+named_count] = (s8)t;
+		}
+
+		len += sprintf(p + len, "temperatures:\t" );
+		for (i = 0; i < total_count; ++i) {
+			int value = thermal_updt_supported 
+			          ? (tmp[i] - 2732 + 5) / 10
+			          : tmp[i];
+			len += sprintf(p + len, "%d%c", value,
+			               i == total_count - 1 ? '\n' : ' ');
+		}
 	}
 
 	return len;