[argyllcms] Re: Dispread white drift compensation problem

  • From: Vallo Kallaste <kalts@xxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Fri, 19 Dec 2014 14:15:41 +0200

On Fri, Dec 19, 2014 at 11:49:26AM +1100, Graeme Gill <graeme@xxxxxxxxxxxxx> 
wrote:

> Hi,
>       seems like some serious problems there. Without more detail (i.e.
> -D 6 log of the dispread -Iw case), I can only guess, but my guess would
> be that there is a timing problem - the patches have not stabilized
> when the readings are being taken. One way of diagnosing if this
> is the case would be to set the ARGYLL_MIN_DISPLAY_UPDATE_DELAY_MS
> environment variable to a large value (i.e. 800 msec) and see
> if that makes the problem go away.

Yes, that was my initial guess as well. Following archive contains 'dispread
-Iw -D 6' log along with .ti1 and .ti3 files. Setting
ARGYLL_MIN_DISPLAY_UPDATE_DELAY_MS=800 has effect, colprof reports peak error
around 4. 
http://bsd.ee/~kalts/Dell_3008WFP_Iw_test.tgz

-- 
Vallo

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