f.lux does not work on second monitor

  • Hello,

    So, I'm using my laptop with two external monitors (laptop monitor disabled), the first one running over HDMI and the second one over an USB 3.0 to HDMI adapter (running Fresco Logic). The monitor over HDMI works perfectly with f.lux while the other, although it shows in diver info and in the disable menu, does not. Before I left for a couple of months in the summer, both monitors worked just fine. Now, when I returned in October and plugged the monitors back in, I noticed that the second one was not working with f.lux. I'm running Windows 10 Pro, version 1903, OS build 18362.418. I also attached below a picture with diver info. Thanks in advance !


  • Thanks for the report - right now we do not have a Fresco Logic adapter in house, and there are several bugs with multiple monitors in Windows 10. Was f.lux working with this adapter previously?

  • @herf Thank you for the response. Yes, f.lux was working perfectly with the adapter before (before being in the summer, so I think before the latest windows big update which was the May update that rolled out later in the year because of the bugs).

  • HI buddy, this happens mostly due to not using the connections so something gets freeze. Do try cleaning and you should be good to go.


  • @herf hi! i´ve installed f.lux in my notebook and have a external monitor (HDMI) plugged in, but i´ve observed that only the external monitor is working with f.lux. So, how can I use f.lux in both monitors?

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