mirrormystic that's weird i tried the MBP 16" M4, and I could immediately feel the effect when looking at a white page, did u change any settings?
NewDwarf mirrormystic I use the BetterDisplay tool to disable dithering, changed default resolution from 1512x982 to 1352x878, disabled auto brightness (I manually set 8-9 brightness bars which is pretty fit to me. More bars activates PWM). That's it. I already use MBP M4 more than a month.
NewDwarf mirrormystic Also, please pay attention on https://ledstrain.org/d/3250-macbook-air-m2-interesting-finding MBA's have permanent weird low frequency flickering which definitely affects sensitive people.
ladytr0n NewDwarf How do you disable dithering in BetterDisplay? I just downloaded it and couldn't find the option in the menu. I just bought an MBA M4, 15 and am facing eye strain and brain fog issues for the first time ever.
mirrormystic just tested it (MBA M3 15"), it still flickers on 7-8 bars. did u test the MBP 4M for flickering on those bars? I guess WPM should flicker, no?
NewDwarf mirrormystic mirrormystic just tested it (MBA M3 15"), it still flickers on 7-8 bars. What do you use to test flickering? mirrormystic did u test the MBP 4M for flickering on those bars? I guess WPM should flicker, no? MBP M4 has only PWM related flickering 15 kHz. I believe it is safe flickering. But, at the same time, MBP M4 has large PWM magnitude only from 10+ bars. So I use "safe" level.
languidicity NewDwarf Am I mistaken or are you saying that you don’t see the low frequency gray flicker on your M4 Pro that can be seen on other IPS MacBooks?
NewDwarf languidicity I usually measure with an oscilloscope and a photodiode. There is no "special" flickering on the gray colour. Moreover, PWM for the gray colour has better parameters in compare with the white colour. BTW, miniLED screens, like OLED screen, have individual control of PWM for the specific pixel (depending of the colour and brightness).
languidicity NewDwarf This sounds promising, thanks. I cannot use a MacBook Air but need a portable Mac. The only screens I can use right now are my iPhone 15 and a LG OLED TV. I tried an iPad Pro M4 thinking that I could use it as a remote ‘terminal’ for a Mac Mini but it gave me migraines. LED LCD’s are seemingly unusable for me but I might try a mini-LED MacBook Pro. Not sure what you mean by individual pixels having their own PWM on mini-LED displays? Surely such finely grained control is impossible and would at most be limited to the lighting zones?
NewDwarf languidicity languidicity Not sure what you mean by individual pixels having their own PWM on mini-LED displays? Surely such finely grained control is impossible and would at most be limited to the lighting zones? I used a colour bar table for testing. Moving the photodiode over the border of two different colours immediatelly changes PWM pattern. Maybe it is not an individual pixel control PWM implementation but very close to this. Each colour has its own PWM pattern like on OLED screen.
languidicity NewDwarf Ok interesting. That sounds like some sort of pixel processing/dithering if each colour is flickering at a different rate. Electrical control of the lighting of individual pixels is not possible on a backlit LED display such as with the M4 MacBook Pro. MiniLED displays have at best thousands of individual backlights. The 14” M4 Pro has 5.94 million pixels.
NewDwarf languidicity not exactly. It is better to say PWM flickering begins on different brightness level for the specific colour. PWM is 15 kHz for each colour.
mirrormystic but like my neusia is only when im looking at a white page, like this website, i turned color tune off
NewDwarf ladytr0n Colour mode -> GPU dithering. To verify result, use ioreg -lw0 | grep -i enableDither Expected result is | | | | "enableDither" = No | | | | "enableDither" = Yes | | | | "enableDither" = Yes
ladytr0n NewDwarf Got it, thank you. I played around with the settings and went from all No to all Yes, to what you shared.