[argyllcms] Re: problem loading LUT-based icc profile to CRT

  • From: David Heinrich <dh003i@xxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Wed, 9 Dec 2009 14:29:09 -0500

On Wed, Dec 9, 2009 at 3:26 AM, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote:

> David Heinrich wrote:
>
>> I've made a LUT-based profile and am trying to load it (where are they
>> loaded anyways, system software, gpu, monitor?).
>>
>
> The 'vcgt' tag is loaded into the graphic card hardware to calibrate
> the monitor. It's up to applications to load the profile to access
> the monitor characterization information, so that they are
> able to transform colors into the calibrated monitors colorspace.
>
> See <http://www.argyllcms.com/doc/calvschar.html>
>
>
>  When alternating between
>> clearing profiles from the system and loading my LUT-based profile, I see
>> a
>> quick flicker on the screen (but not one of the audible ones where the CRT
>> makes noise). However, I don't notice any change in my ~18% neutral gray
>> desktop background.
>>
>
> Maybe the monitor has a native characteristic very similar to
> the calibration target ?
>
> Have you tried loading "strange.cal" from the argyll ref directory,
> to get a more obvious visual indication that the calibration gets loaded ?
>

What do I do to do that?


> I have a Sony GDM-F520 CRT monitor, 2048x1536. xrandr reports detected EDID
>> modes, so I'm not sure why I'm getting these weird "Failed to get EDID for
>> display" messages. (DVI-I_2/analog is my CRT, I'm not using the other one
>> at
>> the moment).
>> *
>> $ sudo /opt/Argyll/bin/dispwin -v -c; dispwin -v -E 9 -V
>> colprof-sony-gdm-f520-3000-patches-12-6-2009.icc*
>>
>
>  Verify: 'colprof-sony-gdm-f520-3000-patches-12-6-2009.icc' is NOT loaded
>> (discrepancy 12.2%)
>>
>
>  *$ sudo /opt/Argyll/bin/dispwin -v -E 9 -I
>>
>> colprof-sony-gdm-f520-3000-patches-12-6-2009.icc ; dispwin -v -E 9 -V
>> colprof-sony-gdm-f520-3000-patches-12-6-2009.icc*
>>
>
>  Verify: 'colprof-sony-gdm-f520-3000-patches-12-6-2009.icc' IS loaded
>> (discrepancy 0.0%)
>>
>
> Seems like the calibration gets loaded as far as the software
> is concerned.
>

Does that mean it is probably working? Any reason it wouldn't be if the
software says it is?


>
>  *$ xrandr*
>>
>
> Try running xrandr --prop and see whether you can see the EDID property.
> Is it called "EDID_DATA" or something else ?
> If it's not there or not accessible because it's called something else,
> then that's why the warnings about it.
>

Here's the result, I see no EDIT or EDID_DATA field.

$ xrandr --prop
Screen 0: minimum 320 x 200, current 2048 x 1536, maximum 3840 x 3936
DVI-I_1/digital connected 1920x1200+0+0 (normal left inverted right x axis y
axis) 480mm x 300mm
        _HDMI: 0 (0x00000000)   range:
(0,1)
        _Coherent: 0 (0x00000000)       range:
(0,1)

_PanningArea:

        _OutputNumber: 1
(0x00000001)
        ConnectorNumber: 1
(0x00000001)
        ConnectorType:
DVI-I
        SignalFormat:
TMDS
                supported:
TMDS
   3840x2400      12.7
+
   1920x2400
20.1

   1920x1200
40.9*

   1600x1200
59.9

   1280x1024      75.0
59.9
   1024x768       84.9     75.1     70.1
60.0
   800x600        84.7     72.2     75.0     60.3
56.2
   640x480        84.4     75.0     72.8
60.0
DVI-I_1/analog disconnected (normal left inverted right x axis y
axis)
        _HDMI: 0 (0x00000000)   range:
(0,1)
        _Coherent: 0 (0x00000000)       range:
(0,1)

_PanningArea:

        _OutputNumber: 2
(0x00000002)
        ConnectorNumber: 1
(0x00000001)
        ConnectorType:
DVI-I
        SignalFormat:
VGA
                supported:
VGA
DVI-I_2/digital disconnected (normal left inverted right x axis y
axis)
        _HDMI: 0 (0x00000000)   range:
(0,1)
        _Coherent: 0 (0x00000000)       range:
(0,1)

_PanningArea:

        _OutputNumber: 3
(0x00000003)
        ConnectorNumber: 2
(0x00000002)
        ConnectorType:
DVI-I
        SignalFormat:
TMDS
                supported:
TMDS
DVI-I_2/analog connected 2048x1536+0+0 (normal left inverted right x axis y
axis) 0mm x 0mm
        _HDMI: 0 (0x00000000)   range:
(0,1)
        _Coherent: 0 (0x00000000)       range:
(0,1)

_PanningArea:

        _OutputNumber: 4
(0x00000004)
        ConnectorNumber: 2
(0x00000002)
        ConnectorType:
DVI-I
        SignalFormat:
VGA
                supported:
VGA
   2048x1536_73
73.0*+

   2048x1536
60.0

   1920x1440      75.0     60.0
   1856x1392      75.0     60.0
   1792x1344      75.0     60.0
   1600x1200      85.0     75.0     70.0     65.0     60.0
   1680x1050      84.9     74.9     69.9     60.0
   1600x1024      60.2
   1400x1050      85.0     74.8     70.0     60.0
   1280x1024      85.0     75.0     60.0
   1440x900       59.9
   1280x960       85.0     60.0
   1360x768       59.8
   1152x864      100.0     85.1     85.0     75.0     75.0     70.0     60.0
   1024x768       85.0     75.0     70.1     60.0     43.5
   832x624        74.6
   800x600        85.1     72.2     75.0     60.3     56.2
   640x480        85.0     72.8     75.0     59.9
   720x400        85.0
   640x400        85.1
   640x350        85.1



>
> Have you tried V1.1.0 RC2, it has a couple of fixes in this area, and
> will locate the EDID data from either the "EDID_DATA" or "EDID" output
> property.
> (
> http://www.freelists.org/post/argyllcms/ArgyllCMS-V110-RC2-is-now-available
> )
>

Trying it now, will update on it.

>
> Graeme Gill.
>
>


-- 
Social sciences can never use experience to verify their statements --
Ludwig von Mises

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