i810, mergedfb and lid switch and acpi video

emisca emisca.ml at gmail.com
Wed Jan 17 07:08:52 PST 2007

I've also seen that windows vista document... perhaps it's a
requirement to pass vista certification to have the _BCQ method.
In addition when I compile the dsdt with iasl it complains about _BCQ
as unknown............ Microsoft decided to change that name and hp
followed them?
Yesterday I've seen that there is a new bios for my machine, version
F0A. Does anyone experimented with it? I will try it on the weekend...
For now I'll try to change the DSDT file, I use the patch to replace
DSDT on linux and I'll report if it works.

Regarding the lid switch, is there something I could try?


2007/1/17, Peter Clifton <pcjc2 at cam.ac.uk>:
> SORRY - sent back to Luming by mistake - meant to send to all.
> On Wed, 2007-01-17 at 12:20 +0800, Yu, Luming wrote:
> > But there is NO _BQC. Instead of _BQC, there do have a _BCQ in DSDT.
> > Is this a bug of BIOS? Acpi video drvier needs _BQC to get the
> > current brightness level, and to get the next level to set on
> receiving
> > notification of 0x86 (Increase Brightness) , 0x87 (decrease
> Brightness).
> I can ACK that my HP had a similar typo / feature with its intel based
> video:
> 00:02.0 VGA compatible controller: Intel Corporation Mobile
> 945GM/GMS/940GML Express Integrated Graphics Controller (rev 03)
> The _BQC is absent, but a strange _BCQ is there - which looks to give
> the correct functionality.
> The ONLY place I can find any reference to _BCQ is in a couple of
> Windows Vista design documents about making display brightness work with
> Vista.
> Thank you Microsoft, for that typo - presuming thats what it is!
> Peter Clifton

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