can't mount root disk with ACPI enabled

[Sepherosa Ziehau]

On Tue, May 19, 2009 at 7:33 PM, Johannes Hofmann
<johannes.hofmann at gmx.de> wrote:
> Hi,
>
> starting with revision
>
> commit 50b53814fb840b70162a846420b75c5bb9432931
> Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
> Date:   Sun May 17 13:11:50 2009 +0800
>
>    More clock cleanup:
>
>    - Move rtc initialization to SI_BOOT2_CLOCKREG, SI_ORDER_FIRST
>    - Staticize cpu_initclocks()
>
>
> My thinkpad T42 fails to mount the root device with ACPI enabled. When
> I boot without ACPI it works fine.

Looks like acpi timer is whacked.  Could you do following test:
set debug.acpi.disabled="timer"
and boot the problematic kernel?

Anyone has clue why this happened (i8254 and rtc initialization
order)?  All of my testing boxes works fine with the new order
though...

Best Regards,
sephe

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