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Date: Mon, 25 Feb 2013 20:20:29 -0800
From: matt <sendtomatt@gmail.com>
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To: Adrian Chadd <adrian@freebsd.org>
Subject: Re: Fixing X220 Video The Right Way
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On 02/25/13 18:33, Adrian Chadd wrote:
> [101232] acpi_video0: <ACPI video extension> on vgapci0
> found Internal/Integrated Digital Flat Panel(400), idx#0, port#0, head #0
>
> And what do I do with acpi_get_handle ?
>
>
>
>
I threw printfs into acpi_video, not sure if that would work for both
vgapci or not.
I'm not sure if I wiped out my debug patches yet, I may have a patch.
Basically the idea is to figure out which paths in the DSDT are getting
attached to the vgapci devices.

This dsdt patch from Mitsuru Iwasaki illustrates fixing a similar issue
to X220 via a custom dsdt
http://people.freebsd.org/~iwasaki/acpi/tpx61.asl.diff
<http://people.freebsd.org/%7Eiwasaki/acpi/tpx61.asl.diff>

It seems like we could either try to find these paths on affected
models, or have a tunable override for acpi_video.

Matt