linux-kernel - Re: ASUS M2NPV-VM APIC/ACPI Bug (patched)

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Date:	Wed, 01 Nov 2006 15:21:02 +0100
From:	impulze <impulze@...ulze.org>
To:	linux-kernel <linux-kernel@...r.kernel.org>
CC:	Andi Kleen <ak@...e.de>, Allen Martin <AMartin@...dia.com>,
	Robert Hancock <hancockr@...w.ca>, Len Brown <lenb@...nel.org>,
	Andy Currid <ACurrid@...dia.com>
Subject: Re: ASUS M2NPV-VM APIC/ACPI Bug (patched)

Andi Kleen wrote:
>> Well that's the problem.  The issue only existed in the nForce2
>> reference BIOS (and maybe early in nForce3) but we still occasionally
>>     
>
> Definitely some NF3 too, i've seen it on 64bit boxes.
>
>   
>> see shipping customer BIOSes to this day that have this same bug for
>> nForce5 (like M2NPV referenced in this thread).
>>
>> Probably what ASUS is doing in the M2NPV BIOS is copying the ACPI tables
>> from an earlier nForce2 product.
>>     
>
> But the timer override is correct or still broken?
>
>   
>> Probably what needs to happen is to make the HPET check more robust and
>> only return 1 if HPET is present and enabled.
>>     
>
> I think the problem is that those Asus boards also don't have a HPET
> table. So even though NF5 has HPET the kernel doesn't know about it
> and the heuristic "if HPET then NF5 and timer override ok" breaks.
>
> I still suspect doing a 
> "if (PCI ID from NF2 or NF3) ignore timer override" 
> is probably the best solution right now. But I don't have a full
> list of PCI-IDs for NF2/NF3. Do you have one?
>
> Ok that might still break the NF4. I assume it never needs any
> timer overrides so it might be safe to include it in the PCI-IDs
> too.
>
> Or do you have a better proposal?
>
> -Andi
>   
Anyway i chatted around the globus and someone also mentioned that my 
IRQs for sound and several others are very high. I'm not sure if this is 
a board issue or a kernel issue. But since the sound chip on board (hda 
intel) is having problems too I guess it's a kernel related thing. I 
wonder if this will be fixed in newer versions.
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