Installed on Xubuntu 12.04, using dual-monitors. "f.lux indicator applet" shows up in my Accessories menu. First time running it I gave it latitude & longitude.

Installed on Xubuntu 12.04, using dual-monitors. "f.lux indicator applet" shows up in my Accessories menu. First time running it I gave it latitude & longitude. It starts up (its icon shows up in the tray), but it doesn't seem to have any effect. Trying to open the applet's Preferences has no effect.