RE: i810, mergedfb and lid switch and acpi video

RE: i810, mergedfb and lid switch and acpi video

[Yu, Luming]

>Here are the dsdt decompiled, and the acpidump output.
>Could you see also the section related to brightness control? I can

Yes, I found :

Method (_L02,..)
	    If (LEqual (Local0, 0x03))
                {
                    Notify (\_SB.C002.C080.C13F, 0x87)
                }

                If (LEqual (Local0, 0x02))
                {
                    Notify (\_SB.C002.C080.C13F, 0x86)
                }
And:
	_BCL, _BCM under C13F.

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).

Could you just try to replace _BQC with _BCQ in acpi/video.c?


Thanks,
Luming

RE: i810, mergedfb and lid switch and acpi video

[Peter Clifton]

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

Re: i810, mergedfb and lid switch and acpi video

[emisca]

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?

Bye

2007/1/17, Peter Clifton <pcjc2@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
>
>
>

RE: i810, mergedfb and lid switch and acpi video

[Yu, Luming]

>
>I have an hp nx7400 notebook with intel 945gma. The lid switch
>normally toggles (using acpi video module) internal display and
>external display.
>It works like a charm, unless using mergedfb. I have not tried with
>dual screen or dual screen + xinerama because I was affected by the
>bug fixed (probably, I've not tested it) by 1.7.4 version of the
>driver.
>Using mergedfb, if I press the lid switch or close the screen, the
>display gets corrupted and I have to reinit the card switching to a
>virtual console and returning back to X.
>
>Is there a way to disable the switching behaviour of the acpi code? I
>was able to disable completely the switch unloading the acpi video
>module, but it's not the right way....
>

Please send me acpidump output , let me check how does acpi video
extension get
supported on hp nx7400. 

If it support _DOS, please just try  " echo 0 > /proc/acpi/video/*/DOS "

Thanks,
Luming

i810, mergedfb and lid switch and acpi video

[emisca]

I have an hp nx7400 notebook with intel 945gma. The lid switch
normally toggles (using acpi video module) internal display and
external display.
It works like a charm, unless using mergedfb. I have not tried with
dual screen or dual screen + xinerama because I was affected by the
bug fixed (probably, I've not tested it) by 1.7.4 version of the
driver.
Using mergedfb, if I press the lid switch or close the screen, the
display gets corrupted and I have to reinit the card switching to a
virtual console and returning back to X.

Is there a way to disable the switching behaviour of the acpi code? I
was able to disable completely the switch unloading the acpi video
module, but it's not the right way....

Bye