When performing display color calibration through gnome-color-manager using hardware colorimeter (pantone huey in my case) odd profile results are obtained and sometimes the process fails. The problem is probably due to the test on-screen color patches that are rendered in a full screen window but have a trasparent layer applied to them instead of being opaque as expected (see atteched screenshot). This does not appear to be an argyll problem as the calibration with the same setup can be performed sussessfully installing and using DisplayCAL app that also uses argyll. The bug is also present in the X session.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-color-manager 3.26.0-1
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.1
Architecture: amd64
CurrentDesktop: GNOME
Date: Sun Oct 29 10:52:26 2017
InstallationDate: Installed on 2017-10-26 (2 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=it_IT.UTF-8
SHELL=/bin/bash
SourcePackage: gnome-color-manager
UpgradeStatus: No upgrade log present (probably fresh install)
I further tested this on a live session of Ubuntu Gnome 17.04 and Fedora 26 (Gnome 3.24) and the bug was not present there. I will test it on Fedora 27 as soon as it is released to check if the issue is related to Gnome 3.26 or Ubuntu specific.