Hi, In that bug, dispwin is unable to load an ICC profile if the nvidia xorg driver is used (works with the nouveau driver) and this also works with xcalib, so I don't know where the problem is exactly. http://bugs.debian.org/684123 also reported here (seems to be related to XRandR) : http://forums.gentoo.org/viewtopic-t-927782-start-0.html Christian