[Openicc] HP Elitebook 8540W notebook with Dreamcolor display

[Kai-Uwe Behrmann]

Am 12.02.11, 09:00 -0500 schrieb Emil Briggs:
> On Friday 11 February 2011 18:02:10 Kai-Uwe Behrmann wrote:
>> Am 11.02.11, 17:18 -0500 schrieb Emil Briggs:
>>> I very recently acquired an HP Elitebook 8540W equipped with the
>>> Dreamcolor display. I'm running Linux on it and while searching for
>>> software that would let me utilize the screen to it's full capabilities
>>> I ran across a mention of ookala-mcf in an old thread here.
>>> Unfortunately that project seems to be dead and the code threw lots of
>>> errors when I tried to build it. Is anyone aware of any other Open
>>> source projects that might have support for this hardware?
>>
>> A actual compiling Linux version of ookala-mcf is available [1].
>>
>
> Thanks. I grabbed a copy. It built with no issues. I tried running hpdc_util

Great

> to see what was there and it gave me a "No displays found" message.
>
> i2cdetect -l shows 10 separate /dev/i2c-* nvidia entries so the kernel i2c
> support is there. I ran hpdc_util again with strace and started looking
> through the code. The devices are opened successfully but writing to them
> fails. I'm not quite sure how to proceed next. I do have the Quadro graphics
> card with the proprietary driver. Just for kicks I tried using the opensource
> nvidia driver but this does not work -- looking in the Xorg.0.log it finds the
> I2C/ddc interfaces but is unable to read any EDID information from them.

Did you see the forum post on the ookala-mcf page around EDID?
http://sourceforge.net/projects/ookala-mcf/forums/forum/898199/topic/3397415

> The proprietary driver does have an option to enable 30 bit color so I tried
> that. I see what you mean about the apps not being ready :)

> I'm going to spend some time wrapping my head around the ookla code to see if
> I can figure out why it's not working (though I suspect that it may be related
> to the i2c kernel stuff).

What do you plan to do with it?

Calibration of display internal LUTs is not much an option without a
device SDK. The factory calibration for the standalone dreamcolor is quite 
good. Direct profiling is not a bad choice.

Btw. Oyranos has a tool called oyranos-monitor-nvidia, wich asks the 
nvidia driver to supply the EDID. EDID can be placed as a Xatom into the 
root window by the -p option.

kind regards
Kai-Uwe Behrmann
-- 
developing for colour management 
www.behrmann.name + www.oyranos.org