Comment 2 for bug 1702492

Additional notes:
I do NOT have an nvidia graphics card, just built-in graphics on haswell.

The 'reset' isn't actually reflected in the color settings window: it still SHOWS that I it is using a custom color profile, but it isn't. If i double-click on the (already selected) profile, colors switch and profile is activated again.

Screen lock (as mentioned in bug description) does not influence it. Turned off lock screen in privacy settings, same thing.