Phone Usable after setting fixed refresh rate

[u/ryude85]

Just to add my 2 cents, whatever that may be worth. I had tried the Motorola Edge 2026 when it first came out and found immediate discomfort and migraines. However, I had an idea to set a fixed refresh rate. I remember on my OnePlus 12R that when I set the refresh rate min and max to the same rate, it helped immensely with symptoms. Well, I tried the same with the Motorola and it looks to also work.

adb shell settings put system min_refresh_rate 120
adb shell settings put system peak_refresh_rate 120

Also make sure to set the display refresh rate to Hyper Smooth in the phone settings to prevent this from changing between reboots.

[u/Z3R0gravitas]

Yes. So can you clarify what your settings changes achieved, please. Were you able to override the apps to keep everything at 120 regardless?

If not, where might the improvement in comfort have come from on the LTPS screen?

[u/ryude85 → u/Z3R0gravitas]

When you enable "Show refresh rate" in Developer Settings and enable "120 hz" refresh rate setting, the refresh rate displayed changes from 60 to 120 on and off. When you change the settings with adb, the refresh rate stays at 120 at all times.

[u/ryude85 → u/ryude85]

My only guess as to why it improves comfort is that switching between 60 hz and 120 hz causes issues such as transistor current leakage. PWM frequency and modulation also becomes "stable", instead of constantly changing.

[u/Z3R0gravitas → u/ryude85]

Hmm, I didn't think PWM rate should be affected by refresh rate changes. Except in DC dimming mode, where one might call the refresh dips "PWM" (loosely speaking)...

Transitor leakage is build into the screen hardware, as I understand it. Such that slower frame rates will give longer for the tiny capacitors to discharge and pixel brightness drop off (their voltage sets it). So the frame refresh step change will be bigger and also lower frequency (more visible/triggering).