https://bugs.freedesktop.org/show_bug.cgi?id=28073

--- Comment #8 from Glen Ditchfield <[email protected]> 2010-05-12 21:28:38 
PDT ---
I generated an xorg.conf file with "Xorg -configure", and modified it to
contain  "DisplaySize 285 215" in the Monitor section. (The generated file had
"#DisplaySize 290 210", commented out.)  Xorg.0.log now contains 

  (II) RADEON(0): EXA: Driver will not allow EXA pixmaps in VRAM
  (**) RADEON(0): Display dimensions: (285, 215) mm
  (**) RADEON(0): DPI set to (124, 124)
  (II) Loading sub module "fb"

However, xdpyinfo still says the monitor has 96 dpi, and KDE still uses small
lettering.

>From bug 23705, I understand that Xorg sets DPI to 96 in the default case (and
strongly disagree with the decision!), but when I explicitly set the screen
dimensions, you should go along with me.  Adding a "--dpi" option in the KDM
start-up scripts is just not right.

Note also that, as mentioned in the Launchpad bug, the vesa driver calculates
nearly correct dimensions and DPI.

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