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Old 12-04-2009, 11:15 PM
Leann Ogasawara
Default x86: ASUS P4S800 reboot quirk


Bug reporter noted their system with an ASUS P4S800 motherboard would
hang when rebooting unless reboot=b was specified. Their dmidecode
didn't contain descriptive System Information for Manufacturer or
Product Name, so I used their Base Board Information to create a reboot
quirk patch. The bug reporter confirmed this patch resolves the reboot
hang. Please consider applying.

Leann Ogasawara

Handle 0x0001, DMI type 1, 25 bytes
System Information
Manufacturer: System Manufacturer
Product Name: System Name
Version: System Version
Serial Number: SYS-1234567890
UUID: E0BFCD8B-7948-D911-A953-E486B4EEB67F
Wake-up Type: Power Switch

Handle 0x0002, DMI type 2, 8 bytes
Base Board Information
Manufacturer: ASUSTeK Computer INC.
Product Name: P4S800
Version: REV 1.xx
Serial Number: xxxxxxxxxxx

>From 303bffef31e1a03f1d87606b15153e176c12b686 Mon Sep 17 00:00:00 2001
From: Leann Ogasawara <leann.ogasawara@canonical.com>
Date: Fri, 4 Dec 2009 15:42:22 -0800
Subject: [PATCH] x86: ASUS P4S800 reboot quirk

BugLink: http://bugs.launchpad.net/bugs/366682

ASUS P4S800 will hang when rebooting unless reboot=b is specified.
Add a quirk to reboot through the bios.

Signed-off-by: Leann Ogasawara <leann.ogasawara@canonical.com>
arch/x86/kernel/reboot.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 2b97fc5..1545bc0 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -259,6 +259,14 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
+ { /* Handle problems with rebooting on ASUS P4S800 */
+ .callback = set_bios_reboot,
+ .ident = "ASUS P4S800",
+ .matches = {
+ },
+ },
{ }


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