https://bugs.kde.org/show_bug.cgi?id=431494
--- Comment #3 from 2wxsy5823...@opayq.com --- You can refer to [1] for adding a custom resolution with xrandr. > I know that that works,I tested it on a per game basis with Gamescope > and it worked flawlessly. When you are playing the game, check your monitor's on-screen display (or monitor's settings panel) to find out the resolution and refresh rate of the input signal. > Try to watch a 2160p video to see if that makes any difference. Actually, if your resolution is not the same as the video's resolution, the media player will scale the video for you: Example of upscaling: 480p video on 1080p monitor Example of downscaling: 4K video on 1080p monitor Some media players such as mpv [2] allow you to configure the scaling algorithms. Some algorithms will sharpen the video but require a powerful GPU. Suppose your monitor does accept an input signal higher than its native resolution, then the scaling will be done by the monitor, which is not ideal since you cannot control how the monitor downscales the input signal. In addition, suppose you have forced 4K but your monitor's native resolution is 1080p, then when you play a 1080p video, it will first be upscaled to 4K by software, then downscaled back to 1080p by your monitor. This will result in quality loss, and it wastes GPU computational power. [1] https://wiki.archlinux.org/index.php/Xrandr#Adding_undetected_resolutions [2] https://github.com/mpv-player/mpv -- You are receiving this mail because: You are watching all bug changes.
