[colord] Colord does not recognise DP-MST monitors

[Niccolò Belli]

Hi,
Colord does not recognise my two Dell U2515H monitors connected to my 
laptop through DP-MST (DisplayPort MultiStream). I'm using Archlinux with 
colord 1.3.3.

Niccolo'

$ colormgr get-devices
[...]
Object Path:   /org/freedesktop/ColorManager/devices/sysfs__null_
Owner:         root
Created:       November 15 2016, 11:45:04 AM
Modified:      November 15 2016, 11:45:04 AM
Type:          camera
Enabled:       Yes
Embedded:      No
Serial:        /sys/devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0
Seat:          seat0
Colorspace:    rgb
Device ID:     sysfs-(null)

Object Path:   /org/freedesktop/ColorManager/devices/sysfs__null_
Owner:         root
Created:       November 15 2016, 11:45:04 AM
Modified:      November 15 2016, 11:45:04 AM
Type:          camera
Enabled:       Yes
Embedded:      No
Serial:        /sys/devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0
Seat:          seat0
Colorspace:    rgb
Device ID:     sysfs-(null)