Thanks for all the replies. That has helped me to see the things clearer :-) Lukas Sommer <div class="gmail_quote">2011/6/17 Alexey Zinovyev <<a href="mailto:alzinovyev@gmail.com">alzinovyev@gmail.com</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> <div class="im">On 17.06.2011 14:44, Lukas Sommer wrote: >> GTK/Qt don't use XFT at all. > > That's interesting. I didn't know this. However, at least the KDE font > settings module changes the Xft.dpi value. Maybe fontconfig makes use of > this one? So maybe this should be switched to use directly fontconfig? > > Lukas Sommer > > </div>It's documented behavior. <a href="https://wiki.archlinux.org/index.php/Font_Configuration#Distorted_fonts" target="_blank">https://wiki.archlinux.org/index.php/Font_Configuration#Distorted_fonts</a> says that fontconfig defaults to Xft.dpi but has it's own DPI setting in fonts.conf (and it works for all GTK/Qt software). Qt doesn't depend on Xft (at least in my distro). GTK+ does, but only for deprecated pango-xft backend. Xft is still needed in other toolkits (like Tk) and in some pure Xlib software (dzen2, xterm, rxvt). </blockquote></div>