diff -Nru a/arch/i386/kernel/acpi/sleep.c b/arch/i386/kernel/acpi/sleep.c
--- a/arch/i386/kernel/acpi/sleep.c	2004-10-15 11:29:15.000000000 +0900
+++ b/arch/i386/kernel/acpi/sleep.c	2004-10-19 00:59:32.000000000 +0900
@@ -17,7 +17,7 @@
 
 extern void zap_low_mappings(void);
 
-extern unsigned long FASTCALL(acpi_copy_wakeup_routine(unsigned long));
+extern unsigned long FASTCALL(acpi_copy_wakeup_routine(unsigned long,unsigned long));
 
 static void init_low_mapping(pgd_t *pgd, int pgd_limit)
 {
@@ -41,7 +41,8 @@
 		return 1;
 	init_low_mapping(swapper_pg_dir, USER_PTRS_PER_PGD);
 	memcpy((void *) acpi_wakeup_address, &wakeup_start, &wakeup_end - &wakeup_start);
-	acpi_copy_wakeup_routine(acpi_wakeup_address);
+	acpi_copy_wakeup_routine(acpi_wakeup_address,
+				 virt_to_phys((void *)acpi_wakeup_address));
 
 	return 0;
 }
diff -Nru a/arch/i386/kernel/acpi/wakeup.S b/arch/i386/kernel/acpi/wakeup.S
--- a/arch/i386/kernel/acpi/wakeup.S	2004-08-14 14:36:31.000000000 +0900
+++ b/arch/i386/kernel/acpi/wakeup.S	2004-10-19 05:24:42.000000000 +0900
@@ -89,6 +89,7 @@
 real_magic:	.long 0
 video_mode:	.long 0
 video_flags:	.long 0
+real_gdt_table: .fill GDT_ENTRIES, 8, 0
 
 bogus_real_magic:
 	movw	$0x0e00 + 'B', %fs:(0x12)
@@ -213,6 +214,7 @@
 #
 # Parameters:
 # %eax:	place to copy wakeup routine to
+# %edx: the second argument (physical address)
 #
 # Returned address is location of code in low memory (past data and stack)
 #
@@ -223,6 +225,9 @@
 	sldt	saved_ldt
 	str	saved_tss
 
+	# save wakeup_start physical address in ecx
+	movl	%edx, %ecx
+
 	movl    %cr3, %edx
 	movl    %edx, real_save_cr3 - wakeup_start (%eax)
 	movl    %cr4, %edx
@@ -231,6 +236,16 @@
 	movl	%edx, real_save_cr0 - wakeup_start (%eax)
 	sgdt    real_save_gdt - wakeup_start (%eax)
 
+	# gdt body must be addressable from real mode by
+	# copying it to the lower mem
+	lea     real_gdt_table - wakeup_start (%ecx), %ecx
+	movl    %ecx, real_save_gdt + 2 - wakeup_start (%eax)
+	xor     %ecx, %ecx
+	movw    saved_gdt, %cx
+	movl    saved_gdt + 2, %esi
+	lea     real_gdt_table - wakeup_start (%eax), %edi
+	rep movsb
+
 	movl	saved_videomode, %edx
 	movl	%edx, video_mode - wakeup_start (%eax)
 	movl	acpi_video_flags, %edx