Comment 44 for bug 589485

(In reply to comment #42)
> ...for me. DPI ist stuck at 96x96 (I would like to use 135).
> I've tried to set it
> 1) via DisplaySize in xorg.conf
> 2) via xrandr --dpi 135
> 3) via xrandr --fbmm.
> xdpyinfo always reports a 96x96 DPI value.
> My video dirver is intel, X.Org X Server 1.7.6.

> Anything else I could try?

It's possible your distro sets Xft.dpi at 96, which typically will override Xorg's setting in at least some apps. If 'xrdb -query | grep dpi' produces 96, you need to find out where that's getting set and disable it, or change it to 135.

It's also possible your DTE (Gnome?, KDE?, other?) is forcing 96. You'll have to look into its settings to see.

xdpyinfo does not always report the DPI used by all apps. There are different ways an app can detect DPI. http://fm.no-ip.com/Auth/dpi-screen-window.html will report the DPI Firefox is using, which may or may not match what xdpyinfo reports, and likely won't if Xft.dpi is set and your screen is higher than typical resolution.

A completely helpful response may depend on your video chip model, distro/version, & video driver/version in addition to your Xorg server version. The most appropriate place and/or time to run xrandr commands can vary due to distro-specific nuances in X implementation. To make -fbmm work in openSUSE 11.3, I had to put it in /etc/X11//xinit/xinitrc in the section labeled "#Add your own lines here...".