Sadly this is a limitation of the nvidia binary driver.  It does not
provide the XRandR 1.2 interface that gnome-color-manager uses to do the
display colour management.

The calibrate button is only enabled when you have some colour-
calibration hardware plugged in - you can't calibrate your screen
without a colorimeter or other such hardware, so it doesn't make sense
for the calibrate button to be enabled without it.

** Changed in: gnome-control-center (Ubuntu)
       Status: Confirmed => Invalid

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-control-center in Ubuntu.
https://bugs.launchpad.net/bugs/884923

Title:
  "gnome-control-center color" doesn't display monitors for calibration

Status in “gnome-control-center” package in Ubuntu:
  Invalid

Bug description:
  When using "gnome-control-center color", it doesn't display either of
  my monitors for color calibration. I'm on 11.10 x64, using the latest
  nvidia binary drivers, monitors in TwinView mode.

  G

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: gnome-control-center 1:3.2.1-0ubuntu1
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  NonfreeKernelModules: zfs zcommon znvpair zavl zunicode nvidia
  ApportVersion: 1.23-0ubuntu3
  Architecture: amd64
  Date: Tue Nov  1 13:51:10 2011
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  SourcePackage: gnome-control-center
  UpgradeStatus: Upgraded to oneiric on 2011-10-25 (7 days ago)
  usr_lib_gnome-control-center:
   deja-dup           20.0-0ubuntu3
   gnome-bluetooth    3.2.0-0ubuntu2
   indicator-datetime 0.3.1-0ubuntu1
   krb5-auth-dialog   3.0.1-1

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