[kde] [Bug 431494] Being able to set a higher resolution than your monitor has

[Toadfield]

https://bugs.kde.org/show_bug.cgi?id=431494

--- Comment #4 from Toadfield <toadfield at tutanota.com> ---
(In reply to 2wxsy58236r3 from comment #3)
> You can refer to [1] for adding a custom resolution with xrandr.

I will test that later.

> > 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.

In the games themself it shows a higher resolution and I see that it looks
better,but I can look later if it changes the resolution of my monitor itself.

> > 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.

ok,thanks for the information.

> 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.

Why should that be a quality loss?
I mean if I set 2160p in the game and it downscales to 1080p,then wouldn't the
game look better?
Cause then it would work like ssaa.
And if I don't want the higher resolution in game,I could just set 1080p in
game.

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