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How to reduce DPI of external monitor using xrandr

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Have

I have the DPI on my laptop set in .Xresources with Xft.dpi: 192. I am outputting to the external monitor with:

xrandr --output HDMI-2 --auto --rotate left --right-of eDP-1

Want

I want to decrease the DPI of the external monitor. Because the screen is bigger, everything gets blown up.

Tried

I tried using the --dpi option but it affects no change:

xrandr --output HDMI-2 --auto --rotate left --dpi 92 --right-of eDP-1

xrandr external-display dpi

posted 10 months ago

CC BY-SA 4.0

young_souvlaki‭

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3 comment threads

Maybe your output device is incorrect try using `xdpyinfo` to check what your are using. (1 comment)

I don't understand what you mean by "reduce the DPI". DPI is a physical characteristic of a monitor a... (4 comments)

Perhaps --auto overrides --dpi? > --auto For connected but disabled outputs, this will enabl... (2 comments)

1 answer

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If changing the DPI using the --dpi option doesn't appear to work, you can try adjusting the display size instead. You can do this using either the --mode or --scale options in xrandr.

Here is an example of how to use the --mode option to set a custom display resolution for the external monitor:

xrandr --output HDMI-2 --mode 1920x1080 --rotate left --right-of eDP-1

In this example, we are setting the external monitor to a resolution of 1920x1080. You can substitute these values with any custom resolution that you want.

Alternatively, you can try using the --scale option to adjust the display size. This option allows you to specify a scaling factor for the display. For example, if the external monitor is too large, you can scale down the display by setting the scaling factor to a value less than 1. Here is an example:

xrandr --output HDMI-2 --auto --scale 0.75x0.75 --rotate left --right-of eDP-1

In this example, we are scaling down the display on the external monitor by a factor of 0.75.

Try adjusting the resolution or scale factor to find a setting that works for you.

posted 2 months ago

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