ddccontrol-users

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

[chris k. <ck...@ph...>]

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.

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.
> 
> 
> 
> -------------------------------------------------------
> SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
> from IBM. Find simple to follow Roadmaps, straightforward articles,
> informative Webcasts and more! Get everything you need to get up to
> speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click
> _______________________________________________
> ddccontrol-users mailing list
> ddc...@li...
> https://lists.sourceforge.net/lists/listinfo/ddccontrol-users

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

[chris k. <ck...@ph...>]

Hi Oleg, hi rest of the list,

Windows uses the official Nvidia-driver to adjust brightness levels (to
my knowlegde) - brightness is not reduced to the defined level until the
Nvidia's software is loaded at startup (as much as I dislike using
Windows, but it provides the necessary battery time when there's no
power source available). It always takes a couple of seconds, until this
"switch" to a lower level takes place. There are several other
(preinstalled) utilities by Sony, but those are in no way connected to
display-settings (again, as far as I can tell, but I'm pretty sure in
this case).
Thanks for the hint regarding the asl-code, but I've absolutly not the
slightest idea of how to create a program, that could implement
ACPI-specific functions (apart from the fact, that as a student of BA I
lack both skills in asl and most other languages that produce hardcoded
output files ;-)

Thanks for the quick answer

-chris

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

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

Hi,

  this is slightly off-topic. :) You should write kernel module to call
ACPI stuff, so start reading ACPI related kernel sources. This is pretty
easy in fact. There are already number of modules for ASUS, IBM, etc.
laptops, which could be used as a good sample. I've not checked acpi for
sometime already, but it's possible that it has support for SONY laptops
already.

Regards,
Oleg.

On Fri, 2005-06-17 at 23:27 +0000, chris kuehn wrote:
> Hi Oleg, hi rest of the list,
> 
> Windows uses the official Nvidia-driver to adjust brightness levels (to
> my knowlegde) - brightness is not reduced to the defined level until the
> Nvidia's software is loaded at startup (as much as I dislike using
> Windows, but it provides the necessary battery time when there's no
> power source available). It always takes a couple of seconds, until this
> "switch" to a lower level takes place. There are several other
> (preinstalled) utilities by Sony, but those are in no way connected to
> display-settings (again, as far as I can tell, but I'm pretty sure in
> this case).
> Thanks for the hint regarding the asl-code, but I've absolutly not the
> slightest idea of how to create a program, that could implement
> ACPI-specific functions (apart from the fact, that as a student of BA I
> lack both skills in asl and most other languages that produce hardcoded
> output files ;-)
> 
> Thanks for the quick answer
> 
> -chris
> 
> 
> 
> 
> -------------------------------------------------------
> SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
> from IBM. Find simple to follow Roadmaps, straightforward articles,
> informative Webcasts and more! Get everything you need to get up to
> speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click
> _______________________________________________
> ddccontrol-users mailing list
> ddc...@li...
> https://lists.sourceforge.net/lists/listinfo/ddccontrol-users
-- 
Oleg I. Vdovikin <ol...@cs...>