From: Alistair John Strachan <s0348365@sms.ed.ac.uk>
To: Chuck Ebbert <76306.1226@compuserve.com>
Subject: Re: [patch] i386: port ATI timer fix from x86_64 to i386
Date: Wed, 1 Mar 2006 13:59:55 +0000
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       Linus Torvalds <torvalds@osdl.org>
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On Tuesday 28 February 2006 21:17, Chuck Ebbert wrote:
> Disable timer routing over 8254 when an ATI chipset is detected
> (autodetect is only implemented for ACPI, but these are new systems
> and should be using ACPI anyway.)  Adds boot options for manually
> disabling and enabling this feature. Also adds a note to the timer
> error message caused by this change explaining that this error
> is expected on ATI chipsets.
[snip]
>
>  	pin1  = find_isa_irq_pin(0, mp_INT);
>  	apic1 = find_isa_irq_apic(0, mp_INT);
> @@ -2294,7 +2311,7 @@ static inline void check_timer(void)
>  		}
>  		clear_IO_APIC_pin(apic1, pin1);
>  		printk(KERN_ERR "..MP-BIOS bug: 8254 timer not connected to "
> -				"IO-APIC\n");
> +				"IO-APIC (expected on ATI chipsets)\n");
>  	}
>

This hunk looks bogus. My understanding is that this is a BIOS bug that some 
vendors have started to correct. We shouldn't acknowledge vendor BIOS bugs as 
"expected", imo..

I had this message for years with my nForce2/nForce3 boards and eventually it 
was repaired.

-- 
Cheers,
Alistair.

'No sense being pessimistic, it probably wouldn't work anyway.'
Third year Computer Science undergraduate.
1F2 55 South Clerk Street, Edinburgh, UK.
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