My screen is composed of two monitor
We cannot set it with GUI Fedora provided.
This is not very direct because we have different dpi.
After few days, I just arrive at the solution and here is the important notes:
First, the screen size must be according to the finer resolution
The screen width is 3840 + 2560 *2
The screen height is according to the larger of 2160
***Trying to zoom in the 4k screen is the wrong approach
Second, GNOME must be set to scale x2
This will make application looks correctly scaled.
Here is the configuration that make it work:
All application must take high definition scaling
$ gsettings set org.gnome.settings-daemon.plugins.xsettings overrides "[{'Gdk/WindowScalingFactor', <2>}]"
$ gsettings set org.gnome.desktop.interface scaling-factor 2
You can edit this with tool like “dconf” for easier interface and also easier way to revert the changes.
Zoom in normal monitor to make 5120x2160 goes back to 2560x1080.
The scale
indicate zoom factor denoted as z
where
xrandr --output DP-0 --scale 1x1 --output HDMI-0 --scale 2x2
$ xrandr --verbose
You will see the output like:
Screen 0: … current 8960 x 2160, maximum 32767 x 32767
...
HDMI-0 connected 5120x2160+3840+0 … 673mm x 284mm
...
DP-0 connected primary 3840x2160+0+0 … 597mm x 336mm
and also the scaling. You will see the transformation matrix to be scaling matrix without any distortion on the normal output like this:
Transform: 2 0 0
0 2 0
0 0 1
Hope this help.
Cheers!
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