This report doesn't agree with what I tested just now.
Using the xrandr CLI to set the refresh rate to 24.0 on my primary monitor and 60.0 on my secondary results in "cinematic" visuals on the primary monitor and normal "soap opera" visuals on the secondary. Setting the refresh rate back to 60 on my primary results in "soap opera" visuals on both.
I'm currently using Windowmaker, but I see no reason why this wouldn't work with KDE. I'm using xorg-server 21.1.23 (which supports RandR 1.6), xf86-video-amdgpu 25.0.0, xrandr CLI version 1.5.4, and kernel 7.0.12.
I'm on Gentoo Linux. I would not be surprised to learn that Debian (and Debian-derived distros) never shipped a version of Xorg or the related libraries where this worked correctly.
alt Hacker News
This report doesn't agree with what I tested just now.
Using the xrandr CLI to set the refresh rate to 24.0 on my primary monitor and 60.0 on my secondary results in "cinematic" visuals on the primary monitor and normal "soap opera" visuals on the secondary. Setting the refresh rate back to 60 on my primary results in "soap opera" visuals on both.
I'm currently using Windowmaker, but I see no reason why this wouldn't work with KDE. I'm using xorg-server 21.1.23 (which supports RandR 1.6), xf86-video-amdgpu 25.0.0, xrandr CLI version 1.5.4, and kernel 7.0.12.
I'm on Gentoo Linux. I would not be surprised to learn that Debian (and Debian-derived distros) never shipped a version of Xorg or the related libraries where this worked correctly.