https://bugzilla.kernel.org/show_bug.cgi?id=41042





--- Comment #6 from Jose Alonso <joalon...@gmail.com>  2012-01-25 21:13:28 ---
More info:

The system log shows:

ACPI Warning: 32/64 FACS address mismatch in FADT - two FACS tables!
(20110623/tbfadt-369)
ACPI Warning: 32/64X FACS address mismatch in FADT -
0xBB62CF40/0x00000000BB62CF80, using 32 (20110623/tbfadt-489)

Forcing the usage of 64 bit version with the patch below doesn't help!

--- a/drivers/acpi/acpica/tbfadt.c
+++ b/drivers/acpi/acpica/tbfadt.c
@@ -484,11 +484,10 @@ static void acpi_tb_validate_fadt(void)
            (acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) {
                ACPI_WARNING((AE_INFO,
                              "32/64X FACS address mismatch in FADT - "
-                             "0x%8.8X/0x%8.8X%8.8X, using 32",
+                             "0x%8.8X/0x%8.8X%8.8X, using 64",
                              acpi_gbl_FADT.facs,
                              ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xfacs)));

-               acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs;
        }

        if (acpi_gbl_FADT.dsdt &&

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