Re: Incorrect ACPI blacklisting of ASUS P4B266 ?

[Olivier Berger <oberger@ouvaton.org>]

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Hi.

Following advice from Thomas Renninger, I hereby propose a patch for the
ACPI blacklisting kernel code, that I've successfully applied to kernel
2.6.26-15, that allows ACPI detection on Asus P4B266 mainboards.

Maybe there could be a smarter version that would allow blacklisting for
same mainboards with older BIOS versions than the one I'm using, but I
don't know if/how that'd be possible. So the patch I propose is pretty
obvious.

FYI, here are some reports that mention acpi=force working succesfully
for P4B266 mainboards (in english and german) :

http://forums.fedoraforum.org/showpost.php?p=669615&postcount=5 / http://fedoraforum.org/forum/showpost.php?p=669615&postcount=5
https://lists.ubuntu.com/archives/kernel-bugs/2006-November/023486.html / https://bugs.launchpad.net/linux/+bug/43961/comments/145
http://forum.ubuntuusers.de/topic/automatische-abschaltung/#post-249151
http://www.pc-forum24.de/suse-system-installieren/3031-suse-10-2-laesst-sich-nicht-ausschalten.html#post13729

I hope this won't break things for different BIOS versions than mine,
and that this will on the other hand allow lots of users to benefit from
working ACPI.

Best regards,


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--- linux-2.6-2.6.26/arch/x86/kernel/acpi/boot.c.orig	2009-04-25 18:02:10.000000000 +0200
+++ linux-2.6-2.6.26/arch/x86/kernel/acpi/boot.c	2009-04-25 18:03:01.000000000 +0200
@@ -1106,14 +1106,6 @@
 	 },
 	{
 	 .callback = force_acpi_ht,
-	 .ident = "ASUS P4B266",
-	 .matches = {
-		     DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
-		     DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
-		     },
-	 },
-	{
-	 .callback = force_acpi_ht,
 	 .ident = "ASUS P2B-DS",
 	 .matches = {
 		     DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),

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Thomas Renninger <trenn@suse.de> writes:

> On Saturday 28 March 2009 16:32:49 you wrote:
>> Hi.
>> 
>> There are quite a lot of reports of people having problems managing
>> poweroff of their ASUS P4B266 based systems.
>> 
>> It seems that providing acpi=force as a boot param is quite succesful.
>> 
>> Maybe that should be fixed WRT to the blacklisting... hence reporting
>> as advised in the kernel source (arch/x86/kernel/acpi/boot.c).
>> 
>> I unfortunately couldn't identify the reason why such a blacklisting
>> was setup, as it seems to come from long time ago.
> Maybe acpi was broken at that times and the bug was not in the ASUS BIOS,
> but in the ACPI implementation. Or the BIOS got fixed up.
>
> Why don't you send a patch removing the ASUS from the dmi list and post
> it on linux-acpi@vger.kernel.org
> Best also add a pointer to e.g. a discussion where people state that it
> works better with acpi=force.
>
>
>     Thomas

- -- 
Olivier BERGER 
(OpenPGP: 1024D/B4C5F37F)
http://www.olivierberger.com/weblog/
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