gregtsakil9

idk which "strain" case is your… when I thought the polarisation is the issue, I checked all displays around me - safe were horisontal and vertical, one phone was round polarisation. So, personally for me, polarisation is not issue

Last week I checked 3 replacement panel for my laptop, but each of them have defects.

lp173wf4-spf5: opple4 shows no PWM ( 3 khz ) but I felt strain from the laptop's BIOS loading moment. Pixel invertion had a chess pattern. 6-bit panel, great brightness (upto 300nits), a bit red color lack, 7000k temperature

b173han01.8 - great brightness (upto 300nits), no red color lack, 6-bit + FRC, no PWM (40khz, but need adoptation), green channel had epic high value, as when I seen another white screen, it looked red ! 6700k temperature. Chess pattern of pixel invertion

b173han01.0 - bad brightness (upto 140 nits), no red color lack, EDID show it is 6-bit but when I put 8-bit on it, it starts to FRC, excellent temperature ( 6500k ), no PWM - most calm panel of those 3, no eyes adaptation need at all. Chess pattern of pixel invertion

      simplex So, you’re keeping the last one? Are you sure it’s working for you? I thought about polarization because I feel that the best monitors for me were the ones I could view through polarized glasses, like an old LG 27 and the Dell P3221D (60Hz).

      The thing is, after using the Dell G3223D (165Hz), I couldn’t go back to 60Hz—it feels like the PC is lagging. I also wanted to try LG’s gaming monitors, but when I asked LG Greece and ASUS , they couldn’t tell me the polarization angle of the monitors before purchase.

      Now I’m stuck. I’m not even sure if the issue is related to the polarization angle for me.

          gregtsakil9 So, you’re keeping the last one?

          Nope, I wanna try another samples of b173han01.0, without brightness issue

          Another issue could be… overdrive. Its a thing to made pixels more faster, using increased voltage. It also could flickers in oscillogram. Old panels (< 2019year ), despites the FRC, are very "calm" when you look in it, but some new panels - you feel bad at first look. If engeneers dont allow you to control BFI, overdrive, or v-com adjustments via secretmenu, the best solution - to find "good" monitor

              simplex I just bought g3223q its a 32 4k monitor I believe a very high ppi screen making pixels as small as possible is the best solution not be afected by their flicker ,,,because I see that the pixel doesent flikker all together so the effect should be much better if you cant see them ..like my tablet 12.4 inch 1600 x 2560 pixels, 16:10 ratio (~243 ppi density) is very easy to look at but if you realy try to see flicker you can but much much less pronounced .. so try the highest ppi you can find for your laptop and genereal screens..

                  gregtsakil9 so try the highest ppi you can find for your laptop and genereal screens..

                  true. I heard some feedback from sensitive peoples, who starts to use high ppi screens (2k 14 inch for example) and didn't notice any problems

                    moonpie yea it is very nice !! its not true 10 bit no also its an AU Optronics panel and ips AHVA which i don't know what it is also its kinda semi gloss but I dont seem to mind now but in the summer with more sunlight I would have to keep the drapes close most of the day but will see..

                    https://www.displayspecifications.com/en/model/ff602af8

                    I also want to try LG 32GR93U-B

                    Why should I disable vrr? you mean gsync ?I dont think it hase bfi

                      6 days later

                      After some long hours of work and game I can trully say that the dell g3223q is very good for me it also has the polarizer the angle that I now now im sensitive to .I can see though it with polarized glasses !The only downside of the monitor is that is slightly glossy and I have alot of light during the day and it's a little distraction .

                        I added information to the my main post regarding the fact that on AMD video cards dithering is always enabled by default in win10 and in linux.

                        After you set it in 0x0, or 0x11, it feel much better. As someone wrote in web, dithering is blackbox which need very accurate adjust for your current display (which has own pixel-invertion type and FRC). If all 3 types of pixel moving sync bad between themselfs, it produce headache

                        upd: according to BetterDisplay research, only part of the dithering has been disabled. I think I got same results, only partitial disable - final signal before sending to the screen is now free of dithering. But first part, which still strain, could be… ColorSpaceConversion. AMD 780m let me choose gamut I need: CIE RGB, rec2020, rec709 etc. Safe IRIS XE miniPC - doesnt use such convertion. It can make CSC, but it disabled by default. And IRIS XE is comfortable. When AMD 780m, even after setting all values to 0x0 - not.

                        All old hardware, use only sRGB colorspace. New hardware can make convertions. All pixel data re-calced with formulas, and need dithering to smooth results. We need to find, how to disable CSC in 780m, is it real, or hardware use it without any user controls

                        my settings are response time set to super fast , custom coloor because I calibrate with spyder x pro and everything else set default … i only play with brightness levels acording to enviroment ..I wish companys would include this by default ..

                        moonpie Check cables and bandwidth.

                        I tried HDMI/DP cables. I also tried UMR with FMT_BIT_DEPTH_CONTROL settings to disable dithering in each port (FMT0…FMT2), in parallel I disabled all FMT_DYNAMIC_EXP_CNTL and FMT_CLAMP_CNTL settings. After researching registers, I set same values in win10 via ditherig, and get same disabled (0x0) output values. I also tried different gamma and gamuts, sharpening, scaling etc. The dithering results was same - 0xC900 as driver_default in linux/win10, 0x0 in each FMT after turning it off. Moreover, old vega6/7 has same dithering values by default 0xC900 but okay for eyes. And next fact - without AMD drivers in win10, dithering not working (0x0 values) in AMD cards.

                        After that, I suppose 2 variants: another pipeline (not dithering) give eye-strain and controlled via another registers, or grapfic has hardware acceleration which is not controlled

                          moonpie amdgpu.dc=0 ??

                          no, it a bit complicated 🙂 it is 4kb values from registries address of your pci-e device, you need to read/write

                          I had read Mike's research, it is similar as mine. He used old hardware, I use modern. But old/new AMD GPU's controlled via ADL in same way. The dithering 0x0 reduce strain, but not to 0 level. Same as mates from Apple thread there did, disabling dithering in Macs.

                            3 months later
                            dev