Hi,
I'm using dispcalgui 3.0.6.0 with Argyllcms 1.8.3 on Archlinux x64. I get
this error while trying to calibrate my monitor (not immediately but after
a while). My laptop only has usb3 ports. I have both
/usr/lib/udev/rules.d/55-Argyll.rules and
/usr/lib/udev/rules.d/69-cd-sensors.rules. I already added my user to the
colord group. See the log at
https://sourceforge.net/p/dispcalgui/bug-reports/179/
