Try testing it directly on ArgyllCMS V1.6.1 and see if
it works there. (FWIW the ColorMunki Display seems to
work fine on my Linux test system with V1.6.1).
Similar advice goes for RH bug 1000910 - you'll get a much
faster response (probably infinitely faster - in classic Linux
distro fashion such bug reports rarely get triaged and passed upstream)
if you test directly using ArgyllCMS and report any
resulting problems to the ArgyllCMS mailing list or directly to me.
If the instruments work OK with ArgyllCMS, then reporting it
as a bug in gnome-color-manager is appropriate.