--- linux.orig/drivers/acpi/osl.c	2003-05-05 18:00:25.000000000 +0200
+++ linux/drivers/acpi/osl.c	2003-05-05 21:59:19.000000000 +0200
@@ -33,6 +33,10 @@
 #include <linux/interrupt.h>
 #include <linux/kmod.h>
 #include <linux/delay.h>
+#ifdef CONFIG_ACPI_INITRD
+#include <linux/init.h>
+#include <linux/vmalloc.h>
+#endif
 #include <asm/io.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi.h>
@@ -222,14 +226,52 @@
 	return AE_OK;
 }
 
+
+#ifdef CONFIG_ACPI_INITRD
+unsigned char signature[] = "INITRDDSDT123DSDT123";
+
+unsigned char* get_dsdt_from_initrd(unsigned char *start, unsigned char *end)
+{
+	unsigned char *data;
+
+	if (start == NULL)
+		return NULL;
+	printk(KERN_INFO "Looking for DSDT in initrd ...");
+	for (data=start; data < end ; ++data) {
+		if (!memcmp(data, signature, sizeof(signature)-1)) {
+			printk(KERN_INFO " found!");
+			return data+sizeof(signature);
+		}
+	}
+	printk(KERN_INFO " not found!");
+
+	return NULL;
+}
+#endif
+
 acpi_status
 acpi_os_table_override (struct acpi_table_header *existing_table,
 			struct acpi_table_header **new_table)
 {
+#ifdef CONFIG_ACPI_INITRD
+	extern unsigned long initrd_start, initrd_end;
+	unsigned char* new_dsdt=NULL;
+
+#endif
 	if (!existing_table || !new_table)
 		return AE_BAD_PARAMETER;
 
+#ifdef CONFIG_ACPI_INITRD
+	if (strncmp(existing_table->signature, "DSDT", 4) == 0 &&
+		(new_dsdt=get_dsdt_from_initrd((unsigned char*)initrd_start, 
+			(unsigned char*)initrd_end)) != NULL)
+		*new_table = (struct acpi_table_header*)new_dsdt;
+	else
+		*new_table = NULL;
+#else
 	*new_table = NULL;
+#endif
+
 	return AE_OK;
 }
 
--- linux.orig/drivers/acpi/Config.in	2003-05-05 18:44:41.000000000 +0200
+++ linux/drivers/acpi/Config.in	2003-05-05 20:19:06.000000000 +0200
@@ -12,6 +12,10 @@
       bool         'CPU Enumeration Only' CONFIG_ACPI_HT_ONLY
     fi
 
+    if [ "$CONFIG_BLK_DEV_INITRD" = "y" ]; then
+      bool         'Read DSDT from initrd' CONFIG_ACPI_INITRD
+    fi
+
     if [ "$CONFIG_ACPI_HT_ONLY" = "y" ]; then
       define_bool CONFIG_ACPI_BOOT		y
     else
--- linux.orig/Documentation/Configure.help	2003-05-05 19:51:09.000000000 +0200
+++ linux/Documentation/Configure.help	2003-05-05 20:18:56.000000000 +0200
@@ -18602,6 +18602,13 @@
   handles PnP messages.  All ACPI devices use its services, so using
   them requires saying Y here.
 
+ACPI DSDT in initrd
+CONFIG_ACPI_INITRD
+  The DSDT (Differentiated System Description Table) often needs to be 
+  overridden because of a broken BIOS implementation. If you want to put
+  the overriden DSDT into the initrd, see http://gaugusch.at/kernel.shtml
+  for more info. If unsure, say N here.
+
 ACPI System Driver
 CONFIG_ACPI_SYS
   This driver will enable your system to shut down using ACPI, and