linux-kernel - Re: [BUG] 2.6.24 refuses to boot

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Date:	Sun, 3 Feb 2008 06:58:07 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Gene Heskett <gene.heskett@...il.com>
Cc:	Jeff Garzik <jeff@...zik.org>, Chris Rankin <rankincj@...oo.com>,
	linux-ide@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] 2.6.24 refuses to boot - ATA problem?


* Gene Heskett <gene.heskett@...il.com> wrote:

> I believe its the same, but lemme paste it for sure, yes:
> [   26.339926] ENABLING IO-APIC IRQs
> [   26.340119] ..TIMER: vector=0x31 apic1=0 pin1=0 apic2=-1 pin2=-1
> [   26.350129] ..MP-BIOS bug: 8254 timer not connected to IO-APIC
> [   26.350182] ...trying to set up timer (IRQ0) through the 8259A ...  failed.
> [   26.350185] ...trying to set up timer as Virtual Wire IRQ... failed.
> [   26.360186] ...trying to set up timer as ExtINT IRQ... works.
> 
> The third line is the only line that makes it to the screen during the 
> boot trace.
> 
> Now, what does this tell us?

the question would be:

 - if you remove the acpi_use_timer_override boot flag
 - and if you boot a kernel with this hack applied

=> do those weird PATA failures come back?

If the failues do _not_ come back then the problem is somehow 
affected/worked-around by the IO-APIC code that generates the above 4 
lines. If the failures are still the same then the above 4 lines are 
really just an uninteresting side-effect of the acpi_use_timer_override 
flag - and the real side-effects (that fixes PATA on your box) are to be 
found elsewhere.

Sadly, the latter variant is the expected answer.

	Ingo
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