Icc profile problem

Mathieu Taillefumier mathieu.taillefumier at free.fr
Sun Aug 16 06:55:15 PDT 2009

> Something in the X11/extensions/xf86vmode.h functions to load the 
> graphic cards gamma table could have been changed?
thank you for the reply. I checked the history of the file in the git 
repository and nothing happen to this file since beginning of the year.
> Having said that, you are aware that loading the gamma table is not 
> yet a full colour correction? It's merely a calibration, a way to 
> alter the appearance of all desktop elements. Calibration affects gray 
> balance and linearity. A ICC conversion with or without calibration is 
> needed to obtain colour correction, at least in ICC terminology. I ask 
> this as end to end colour management includes many components and your 
> subject line sounds a bit irritating.
I do not know all details about icc standard and my message was not 
meant to be irritating. So I will rephrase the problem and hope it will 
be clearer this time. I created an icc profile couple of weeks ago with 
argyll (and a colorimeter) and the color corrections were taken into 
account by the xserver (a git version) after loading the profile with 
the argyll utilities.
After updating the all xorg stack, the server does not take into account 
the icc profile anymore. So the problem is NOT the icc profile but 
something went wrong either in one of the libs, server, drivers or the 
argyll tools after my update. Since my laptop has a second graphic card 
I will try to load a profile on the second one with the same stack to 
see if it is a driver problem or something else.

Anyway thanks for the help.

best regards


> kind regards
> Kai-Uwe Behrmann

More information about the xorg mailing list