Comment 3 for bug 931849

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Peter Hurley (phurley) wrote :

Attached is a workaround patch that does the dpi scaling in the emacs Xft font driver. This works by scaling the pixelsize by the frame's y-axis dpi. Thus it's necessary to explicitly set the font's pixelsize in either the .Xresources file or via the command line option --fn (see http://www.gnu.org/software/emacs/manual/html_node/emacs/Fonts.html for font setting methods and parameters).

AFAIK, the pixelsize cannot be set using the .emacs font setting method.

NB: Because of the different emacs binary names in ubuntu, if using the .Xresources font setting method, the resource should be wildcarded. Eg.,
    emacs*font: Monospace:pixelsize=8