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    Windows v4
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    • herfH
      herf
      last edited by

      It may be that there is blue-colored backlight bleed at the edges of your monitor.

      You could try the "eyestrain" or "color fidelity" presets (or even "classic f.lux") - because it sounds like our most extreme setting doesn't look very good on your display.

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      • J
        jamesg
        last edited by jamesg

        Hi,

        I have updated my nVidia drivers just to make sure, and that didn't seem to help.

        With the box "Use display data for better colour accuracy" ticked, I get a yellow hue that I don't like.

        With it unticked, I think I'm getting no colour or effect at all. F.lux doesn't seem to work without it ticked.

        Is this the expected behaviour? What colour am I meant to be seeing, and is there a way to get red?

        Thanks

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        • herfH
          herf
          last edited by

          There is a very small change to the color transfer function also - we could possibly make a registry option to use the old one instead. So far, we are getting a lot closer to "blackbody" (planckian locus) on every panel we have tested.

          But what you're saying is important - if we have to be "wrong" (and on Windows calibrations often aren't so good) almost everyone prefers "below" the blackbody curve (more red) rather than "above" it (green/yellow, which looks awful).

          Which display (panel model if you can find it) are you using? Does it have any built-in calibration settings?

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          • S
            saritasarita @herf
            last edited by

            @herf - Why change it? It was perfect! I'm not going to use it like this. This is a mess.

            herfH 1 Reply Last reply Reply Quote 0
            • herfH
              herf @saritasarita
              last edited by

              @saritasarita what are you seeing?

              Again, there should not be a visible change for most people if you're using the same kelvin value as before. The change is mostly designed to work better with wide-gamut displays.

              If you're unhappy with the setting, we also changed the preset before bed, and you can move the slider or choose a different preset.

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              • J
                jamesg
                last edited by

                Having reverted back to v3, I am not 100% sure any more whether I am seeing a difference between v3 and v4 in "classic" mode.

                Of course in default v4 mode, there is an obvious different during night time, when v4 has a much more intense setting, and I often work very late so I will have noticed that straight away.

                With v4 in classic mode, avoiding the new night time settings, I'm not so sure I'm seeing any difference, although I can't seem to get comfortable with it.

                I will try it a few more days and see if I get used to it.

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                • R
                  rStart
                  last edited by

                  hi
                  use display data for better color accuracy introduces a cloying slight greenish tinge on my w520
                  (turning it off pushes red even at 5000k - in between would be perfect)
                  to be fair the display data and default profile are notoriously bad for the 95% sRGB panel on my computer

                  i am using a profile from the same panel type as mine
                  (the optional calibrator for this model is bullocks - and this panel only calibrates well with some equipment)
                  the default profile has serious red issues (as does this monitor with no profile at all - worse though - think aRGB reds on a sRGB panel)

                  i seem to recall being able to tolerate much warmer values with the old transfer function but with v4 i cant stand anything below 4200k

                  please allow a reg value for old behavior if possible.

                  thanks

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                  • herfH
                    herf
                    last edited by

                    Is it a wide-gamut panel (the FHD model back then was) or are you saying it is 95% sRGB? In the newest version, you can post the "driver info" from the options menu and it will show what the panel is reporting. (Download again from the website.)

                    And does f.lux look better without the profile installed? It may just be a bad profile!

                    1 Reply Last reply Reply Quote 0
                    • R
                      rStart
                      last edited by rStart

                      panel is 95% sRGB (considered wide gamut sorta - reds exceed sRGB colorspace)
                      stock profile is trash (i remember reading the display data was also questionable on this panel)

                      monitor is useless without a decent icc profile. i am using a user created one from the same model but not my panel. this is a hard to profile tn panel (the lcd backlight temperture being a big factor)

                      does unchecking use display data cause the program to ignore the monitor profile?

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                      • R
                        rStart
                        last edited by

                        NVIDIA 21.21.13.7691: NVIDIA Quadro 1000M (20170217)

                        ThinkPad Display 1920x1080
                        Dimensions: 344 x 193
                        Year: 2009
                        Chroma:
                        R=0.675781 0.314453
                        G=0.214844 0.665039
                        B=0.140625 0.069336
                        W=0.313477 0.329102
                        sRGB gamut: 102%, AdobeRGB gamut: 91%

                        the profile i am currently using is supposed to be 6500k but is possibly slightly warmer
                        (the garbage thinkpad supplied profile is about 7200k - 8200k it is based on native white)

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                        • herfH
                          herf
                          last edited by

                          I know this exact panel - have a T510 in the closet!
                          https://fluxometer.com/rainbow/#!id=Thinkpad T510 FHD/6500K-ThinkpadT510FHD

                          And I can see what you mean.

                          The old version of f.lux will make "more saturated" colors here (kind of like the panel does for everything), because it is assuming your display is sRGB, which it isn't. The new version is trying to pull it back to "real" colors. But maybe the chromaticities have moved a little bit since 2009, so that might be where the yellowish effect is coming from. I will try to think of a better solution for this - we should do a little better. We have some other options in the code that might work too.

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                          • R
                            rStart
                            last edited by

                            thanks for the reply
                            so apparently the 95% refers to 95% ntsc

                            regardless my question stands
                            "does unchecking use display data cause the program to ignore the monitor profile?"

                            i believe use display data may be over compensating the green channel
                            (i may go back and whip up an avg of the 2 sets of LUT values and test them but it looks like my issue has to do with the green channel alone)

                            i am concerned about a slight green bias when the box is checked.
                            fyi this machine has seen very little on time and the panel almost no uv exposure

                            lenovo stockpiled this monitor and was still using it in the w530

                            the version i used to like on this machine was the old beta from 2012 with the nvidia setting (was icc aware)
                            fyi i was looking at the LUT tables and i wonder if the lines could be smoothed (get rid of value duplication) in v4 (the steps seem a bit lazy)

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                            • R
                              rStart
                              last edited by

                              @herf
                              is your t510 display profiled?
                              could you upload or send me the icc file so we can cross compare

                              i will upload some text files of LUT values + the profile i am using that you can test on your t510 and a link to necessary tools.

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                              • R
                                rStart
                                last edited by

                                @herf
                                im not sure what changed but it seems that the green tinge issue i was having is basically resolved or at least acceptable. I am now using checked "use display data for better accuracy" and am back to using 3400k

                                currently running 4.66 (beta checked)

                                thanks

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