From a1fdcc0d2714b6622e3fd5c00db1635213d6c41a Mon Sep 17 00:00:00 2001 From: Len Brown Date: Sun, 11 Mar 2007 03:26:14 -0400 Subject: ACPI: Add support to parse 2nd MADT When a BIOS bug presents multiple APIC/MADTs, Linux currently uses the 1st and ignores the 2nd. But some machines work better if we use the 2nd. http://bugzilla.kernel.org/show_bug.cgi?id=7465 Add a warning and boot parameter "acpi_apic_instance=2" to allow parsing the 2nd. No change to default behaviour in this patch. Signed-off-by: Len Brown --- Documentation/kernel-parameters.txt | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'Documentation') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 856c8b114e71..22c6b8ccaea5 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -138,6 +138,12 @@ and is between 256 and 4096 characters. It is defined in the file See also Documentation/pm.txt, pci=noacpi + acpi_apic_instance= [ACPI, IOAPIC] + Format: + 2: use 2nd APIC table, if available + 1,0: use 1st APIC table + default: 0 + acpi_sleep= [HW,ACPI] Sleep options Format: { s3_bios, s3_mode } See Documentation/power/video.txt -- cgit v1.2.2 From 09fe58356d148ff66901ddf639e725ca1a48a0af Mon Sep 17 00:00:00 2001 From: Len Brown Date: Sun, 11 Mar 2007 03:32:00 -0400 Subject: ACPI: parse 2nd MADT by default http://bugzilla.kernel.org/show_bug.cgi?id=7465 Signed-off-by: Len Brown --- Documentation/kernel-parameters.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'Documentation') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 22c6b8ccaea5..f0b7a5e5740a 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -142,7 +142,7 @@ and is between 256 and 4096 characters. It is defined in the file Format: 2: use 2nd APIC table, if available 1,0: use 1st APIC table - default: 0 + default: 2 acpi_sleep= [HW,ACPI] Sleep options Format: { s3_bios, s3_mode } -- cgit v1.2.2