From: Dave Hansen <haveblue@us.ibm.com>
To: john stultz <johnstul@us.ibm.com>
Cc: lkml <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@digeo.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>, James <jamesclv@us.ibm.com>
Subject: Re: [PATCH] linux-2.5.69_clear-smi-fix_A1
Date: Mon, 12 May 2003 17:54:57 -0700 [thread overview]
Message-ID: <3EC04261.6020206@us.ibm.com> (raw)
In-Reply-To: 1052785802.4169.12.camel@w-jstultz2.beaverton.ibm.com
john stultz wrote:
> All,
> I've been having problems with ACPI on a box here in our lab. Some of
> our more recent hardware requires that SMIs are routed through the
> IOAPIC, thus when we clear_IO_APIC() at boot time, we clear the BIOS
> initialized SMI pin. This basically clobbers the SMI so we can then
> never make the transition into ACPI mode.
>
> This patch simply reads the apic entry in clear_IO_APIC to make sure the
> delivery_mode isn't dest_SMI. If it is, we leave the apic entry alone
> and return.
>
> With this patch, the box boots and SMIs function properly.
So, without the patch, what happens? Does the thing just completely
freeze when it tries to turn ACPI on? Does the machine _require_ that
you use ACPI?
--
Dave Hansen
haveblue@us.ibm.com
next prev parent reply other threads:[~2003-05-13 0:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-13 0:30 [PATCH] linux-2.5.69_clear-smi-fix_A1 john stultz
2003-05-13 0:54 ` Dave Hansen [this message]
2003-05-13 1:03 ` john stultz
2003-05-13 14:03 ` Dave Jones
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