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I've successfully enabled fractional scaling on my GNOME 3.38 + Wayland in Arch as stated here:

https://wiki.archlinux.org/index.php/HiDPI#Wayland

However, in gnome control center it now only shows 100% 125% 150% 175% and 200% whereas for my screen the best setup would be 250% (that I can set in Windows 10 for example). How can enable values above 200% in gnome control center or either set it manually?

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    You can set integer values in key /org/gnome/desktop/interface/scaling-factor using dconf-editor to set 100%/200%/300% etc ratios. I reported this question in the feature page on the bug tracker.
    – Scrooge McDuck
    Jan 11, 2021 at 23:18

2 Answers 2

Reset to default
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You can use dconf-editor to do this.

  1. Launch dconf-editor app
  2. Navigate to /org/gnome/desktop/interface/
  3. Open scaling-factor and a dialog appears.
  4. You can now set integer values manually at the custom value field e.g 100%, 150%, 250%... ratios.

enter image description here

-4

You can use the gsettings command to modify the scaling-factor setting in the org.gnome.desktop.interface schema.

# Set the scaling factor to 2.5 (250%)
gsettings set org.gnome.desktop.interface scaling-factor 2.5

If you want to set the scaling factor for all users, you can use the dconf command instead of gsettings. For example:

# Set the scaling factor to 2.5 (250%) for all users
dconf write /org/gnome/desktop/interface/scaling-factor 2.5

Note that you may need to log out and log back in for the changes to take effect.

Alternatively, you can use the xrandr command to set the scaling factor manually. For example:

# Set the scaling factor to 2.5 (250%) for the eDP1 display
xrandr --output eDP1 --scale 2.5x2.5
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    dconf and gsettings write to the same database. dconf doesn't magically affect all users. Is this answer generated from ChatGPT or something?
    – muru
    Dec 19, 2022 at 1:19

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