Re: [ddccontrol-users] nvidia geforce go 6200 tc / general laptop support

[Oleg I. V. <ol...@cs...>]

Chris,

  looks like it does not support ddc/ci, or at least it does not follow
standard. You could try scanning all i2c buses looking for it, but it's
all possible, that the bus you're looking for is not attached to nvidia,
but to the embedded controller.

  Do you've any special software installed with Windows? I mean,
probably Sony shipped some driver, which is performing direct access to
the hw or specific acpi methoes. On the other hand, your dsdt looks
promising for you (but it has nothing to do with ddc/ci):
               Device (SNC)
                {
                    Name (_HID, EisaId ("SNY5001"))
                    Method (GBRT, 0, NotSerialized)
                    Method (SBRT, 1, NotSerialized)
                    Method (GPBR, 0, NotSerialized)
                    Method (SPBR, 1, NotSerialized)
                    Method (GCTR, 0, NotSerialized)
                    Method (SCTR, 1, NotSerialized)
                    Method (GPCR, 0, NotSerialized)
                    Method (SPCR, 1, NotSerialized)

  This is brightness/contrast manipulation ACPI method (but it's SONY extension - SNY5001). Also, embedded controller has registers called BRIT and CONT which used by these methods. So, go ahead with ACPI. :)

Regards,
Oleg.

On Fri, 2005-06-17 at 20:34 +0000, chris kuehn wrote:
> Hi all,
> 
> I'm new to list and have a question concerning the support of laptop
> devices (if it is technically possible to control a laptop via
> ddccontrol at all):
> Sony's (PCG-VGN-)S3XP (Pentium-M, 13.3" xblack-display, NVIDIA Geforce
> Go 6200 TC) uses the NVIDIA-driver to set the brightness under windows,
> yet under Linux, the common drivers (sonypi, sony_acpi) have no effect
> on the brightness-settings. Today I've received a mail from a person,
> who stated, the LCD-brightness was controlled by DDCCI (instead of ACPI,
> which most people expected), so at least the problem seems to be
> identified. Still, I have no clue how to get ddccontrol to detect any
> hardware, this is the output I get (with/without rivafb-module):
> 
> http://server1.nordic-it.de/~viper/output_ddccontrol_norivafb
> http://server1.nordic-it.de/~viper/output_ddccontrol_rivafb
> 
> Software employed on the machine is Gentoo Linux, kernel 2.6.11
> (vanilla; i2c ist present, rivafb has ddcci-support enabled),
> NVIDIA-Linux-x86-1.0-7664, Xorg 6.8.2 (Option "Allow DDCCI" is set to
> true), ddccontrol 0.1.2 (not cvs).
> 
> Additional info on the system:
> 
> http://server1.nordic-it.de/~viper/linux2611-vipnet-vaio (.config)
> http://server1.nordic-it.de/~viper/bios.dsl (dissambled acpi-bios)
> http://server1.nordic-it.de/~viper/output_lspci
> http://server1.nordic-it.de/~viper/output_lsmod
> 
> 
> Thanks in advance and best regards
> 
> -chris
> 
> 
> PS:
> Sry, if the mail contains traces of html, I'm not sure, whether
> Evolution replaced weblinks with html-code.
> 
> 
> 
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