[argyllcms] Re: Multiple issues with Argyll, please help

  • From: Rajiv Mehra <to_rajivmehra@xxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Mon, 25 Aug 2008 14:50:59 -0700 (PDT)

Thanks for looking into this, Graeme. I think my instrument is bad.
I am sure I am using your iOne display driver.
I was also very curious about why Argyll keeps failing so I ran diagnostics on 
the probe using X-rite's diagnostics software. I was not surprised that the 
diagnostics for the probe fails if I select the CRT mode. The probe passes 
tests if I select the LCD mode.
So, I ran Argyll in the LCD mode and it works fine (even on the low brightness 
of my CRT projector)! 
Of course the colors are pretty off. The white is very bluish. I guess that 
means that I really need the CRT mode switch for my calibrating my CRT 
projector.
I am now trying to contact x-rite support about this problem. This probe is 
less than 30 days old. I hope they honor the warranty and replace the probe.
 Regards,
Rajiv Mehra
PS: HCFR software is also having problems with my probe in CRT mode.



----- Original Message ----
From: Graeme Gill <graeme@xxxxxxxxxxxxx>
To: argyllcms@xxxxxxxxxxxxx
Sent: Sunday, August 24, 2008 7:13:50 AM
Subject: [argyllcms] Re: Multiple issues with Argyll, please help

Rajiv Mehra wrote:

> By the way, is there a way or a switch to set to have  Argyll retry failed 
> instruments reads?

It shouldn't do this. I can put my i1display 2 completely in the dark,
and it returns a reasonable reading. Are you sure that you have installed
the correct (ie., supplied with Argyll) usb driver ?
The default libusb-win32 driver has a timeout that is too short
for the i1display when reading dark readings, and this could cause a failure.

Perhaps you should send me the output of spotread -D2 for such a failure.

> Also, the brightness levels I am coping with are pretty normal with video 
> projectors. 
> Does this mean Argyll is good for only LCD/CRT computer monitor calibration?

The calibration and profiling software isn't sensitive to the absolute
light levels, it is the instrument that is the issue. Some instruments
are not very accurate at low light levels, and can also take some time
to return values.

Graeme Gill.


      

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