How to switch to a particular resolution? Xorg complains "No valid modes for "DFP-1:2560x1600"; removing." and ignores my setting.

[Aaron Plattner]

On 9/23/20 11:31 PM, Yuri wrote:
> But how does it work when the NVidia utility switches it to this mode then?

Does the output look blurry or fuzzy when that happens? I wonder if 
you're getting a 2560x1600 desktop scaled down to 1920x1080.

You should be able to tell for sure by looking at the output of "xrandr 
--verbose" and "nvidia-settings -q CurrentMetaMode" after setting that 
configuration.


I think Adam's analysis is right: your GPU and/or cable can't support 
the full 3840x21600 native mode of this display, so it falls back to the 
highest mode the monitor says it can support that fits within the 
available bandwidth.

-- Aaron

> I use the HDMI cable.
> 
> Yuri