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4

Can I pass a dpi flag to lightdm to set the proper DPI for X?

rated 0 times [ 4] [ 0] / answers: 1 / hits: 11596 / 1 Year ago, thu, december 15, 2022, 1:01:11

What is the proper way to set DPI value now? gnome-tweak allows to set only scaling factor, which is unsatisfactory and also not all applications take that into account (Chrome for example).

I would like to pass "-dpi" flag to Xorg when it starts, but can't find a way to configure "lightdm" to do so. Is it possible?

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answered 1 Year ago eballxeye · Accepted Answer

In /etc/lightdm/lightdm.conf, you can override the xserver-command parameter (which usually defaults to simply "X"). Here is mine:

xserver-command=X -dpi 75

This has the intended effect of scaling my entire desktop, gnome programs included. Desktop effects are fine, no odd artifacts. It also sets the xdpyinfo, but xft.dpi must be set separately:

$ xdpyinfo|grep dots

  resolution:    75x75 dots per inch

$ xrdb -query|grep dpi

Xft.dpi:    96

See madmuffin's answer for how to set Xft.dpi appropriately.