ryans Gurm I also have eyestrains, sometimes really hard and photobia when i push too hard. But i dont usually have headaches or migrains. Sometimes in certain conditions i have my leg twitching and cramps. In worse cases it's really strong cramps. It's crazy. I used to think that i am more on the blue light then dithering. But i really dont kno

I had the HTC One M7 which was fine on low brightness. But the phone is almost useless now. I am using an Xperia XZ 2 but it's not really safe. But right now i am using just with left eye open, and i found it confortable. I am using for 2 days just with the left eye open. It's ok. But i have my eyes sored, i need to make them fresh to start the test properly. When i open both eyes, i almost feel pain shortly afterwards, and maybe twithcing. I want to give rest to my eyes to keep expericing this one eye thing.

I just tried my colleague phone for like 10 seconds. Didn't had the opportunity to really check.

I also have an 27' Samsung SA850D monitor. It's perfect when has 0 brightness. This was the initial trigger for me. THis monitor. I used it at full brightness when i bought it. I was marvelled by his image, watching photos. 2 days later i was it terrible terrible photobia, and eye strain. Then took a time, to settle. Later used with flux with 25% brightness, then 0 brightness with no flux. Ok. I can spend a all day using with no problem. I have a GTX 670 and Windows 10 with latest update.

Alyosha2001 I think it would be usefull to make a thread/wiki with symptoms (specific, not generic) and the cause of it. What triggers it.

Eye Strain is too vague. Is like knee pain. There's so many reasons for a knee pain. We cant mix everything and try to find a sole conclusion. More schematic thinking and trial is needed.

        Does temporal DIthering happens on VGA output?

        For instance an Intel Graphics like 2xxx series it it's plugged on the VGA to the monitor, does the dithering occurs? Or just on HDMI/DisplayPort?

        From what I can gather a display has native bit depth of say 6, 8, or 10. It then has a alpha channel besides the native bit depth where dithering is assigned. If the display is a non FRC i.e it does not have a alpha channel, the display would not be able to dither regardless of input due to hardware limitations. Is this not correct?

        I don't know about dithering, but analog VGA has, in most cases, noise, which also induces some jittering

        13 days later

        Does anyone know whether Ditherig is supporting Intel 8th-gen processors? I think there was a very terse/generic note about Coffee Lake being supported and the install seemed to work. However, I'm still trying to tell the difference between settings on/off, and seem to continue to be symptomatic.

        Using an i7-8700k and MSI 1070. White screens still look a bit funny to me and I think symptoms are starting to appear after an hour or so of usage 😢

        Was really hoping that the temporal dithering thing was the solution. Not sure I like this monitor on any device so I need to give one other one a go, but still disappointed and hoping there's an easy answer, yet.

          I don't think it does for newer CPU/GPU pairs, but I may be wrong. I couldn't observe any banding or other difference with ditherig enabled on 7th/8th-gen W10 computers. It worked fine on my 8-years old machine. It might also be a problem with W10, as this older computer was running Windows 7.

          Gorfball

          My understanding of Ditherig is that it only works on the Intel integrated GPU, if you are using your 1070 I don't think it will have any effect. Slightly more complex for laptops, but I assume you are using a desktop?

            5 days later

            Regarding monitors, using Windows 10, can it be problematic buying a monitor with 1,07 billion colors?

            I have a 27'' Samsung with 16,7 million colors. I found no problem with Windows 10. I think that a billion colors might use temporal dithering/FRC to achieve those colors. What do you guys think? Maybe it's safe to buy a 16,7 million color monitor?

            Also what does it means, that on specification a monitor has the following:

            Brightness (Typical): 250cd/m2

            Brightness (Min): 200cd/m2

            Brightness min? The minimum brightness the monitor can achieve? Almost the same has the tipical brightness? Or is a uniformity spec?

            • JTL replied to this.

              tfouto Some true 10-bit moniros exist, but they start around $1500-2000 USD.

              As for your question I'm not entirely sure, but the vast majority of people don't need a 10-bit color palette emulated or otherwise.

                One question:

                Does ditherg disable dithering on intel chips, for all monitors? Or just true 8-bit panel? The ones
                with 6-bit+FRC are also disable or the panel of the monitor dither?

                • JTL replied to this.
                  5 days later

                  tfouto U2717HR I believe. It's a Dell. iirc 6 bit + AFRC. I tried native 8 bit monitors, too, to no avail. I swear Ditherig still works, but will test more when I'm home from holiday travel.

                    tfouto Does ditherg disable dithering on intel chips, for all monitors? Or just true 8-bit panel? The ones
                    with 6-bit+FRC are also disable or the panel of the monitor dither?

                    If your monitor has FRC ditherig does nothing to it, the monitor dithers independently of the video card output.

                        3 months later

                        JTL How can we tell whether a monitor has FRC? I installed ditherig on my laptop, and see no difference. There is no banding when I look at gradients, and my eye strain is still terrible. If FRC is the issue, how can I address it? I have a Lenovo Flex 5 with with a MX130 graphics card.

                        I am so happy to have found this community because I felt like I was going crazy when screens without PWM were started causing me pain.

                        • JTL replied to this.

                            Afsvys It can be hard to know if a monitor has dithering. Here's some advice.

                            • Try and find a list of specifications. If it lists color depth as something like 6+2 bit that is FRC/dithering.
                            • If you know the model number of the PANEL inside the monitor there is a site called PanelLook that might be have the same info, but it's not always accurate.
                            • TFTCentral sometimes lists if a monitor used dithering/FRC.

                            It's honestly easier to get a monitor without dithering. Most IPS panels above 1080p, all BenQ VA panels I think, they don't use dithering.

                                a year later

                                Just for reference - I have updated the original post with my current setup which is usable for 8 hours per day. I'm still extremely sensitive to temporal dithering, and would still love a proper solution to the problem.

                                Really hope this helps someone else as it has changed my life having a workable setup - I don't feel jealous seeing other people able to work for hours on Macbooks any more.. 😀

                                  dev