linux-kernel - Re: KDB blindly reads keyboard port

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Message-Id: <200609291057.41529.bjorn.helgaas@hp.com>
Date:	Fri, 29 Sep 2006 10:57:41 -0600
From:	Bjorn Helgaas <bjorn.helgaas@...com>
To:	Keith Owens <kaos@....com>
Cc:	linux-kernel@...r.kernel.org, linux-ia64@...r.kernel.org
Subject: Re: KDB blindly reads keyboard port

On Thursday 28 September 2006 20:18, Keith Owens wrote:
> I have never been a big fan of ACPI, having seen too many broken ACPI
> tables.  But if that is what you want ...

There's always broken firmware, but I think on the whole, it's better
than just assuming that tomorrow's system will be the same as yesterday's.
I think a big reason for broken tables is the fact that ignore many of
them, so the breakage is never discovered.

> Bjorn, could you apply my previous patch anyway, boot your problem
> system with kdb_skip_keyboard, drop into KDB and
> 'md4c1 acpi_kbd_controller_present'.  That will quickly confirm if acpi
> is detecting the absence of the keyboard on your system.

My system says:

  acpi_parse_fadt: acpi_kbd_controller_present 0
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