Public bug reported:

Binary package hint: xorg

It seems tools like xdpyinfo are reporting screen sizes as 300x230 mm in
a lot of cases when they are not.

On my own Iiyama ProLite E431S with an ATI Radeon 9800 Pro connected
over DVI using the "ati" driver, I get this from xdpyinfo:

screen #0:
  dimensions:    1280x1024 pixels (300x230 millimeters)
  resolution:    108x113 dots per inch

ddcprobe correctly detects the screen physical dimensions:

screensize: 34 27

In another report, https://bugs.launchpad.net/ubuntu/+source/xserver-
xorg-video-intel/+bug/201032 the reporter shows that xdpyinfo quotes:

screen #0:
  dimensions:    1280x800 pixels (300x230 millimeters)
  resolution:    108x88 dots per inch

and ddcprobe reports:

screensize: 33 21

Notice that the screens are actually different dimensions, both in
physical terms and pixel terms, yet xdpyinfo thinks they are 300x230 mm.
Also, the other reporter is using the intel driver.

This did indeed used to work correctly in the early Hardy alphas, and
previous releases of Ubuntu.

ProblemType: Bug
Architecture: i386
Date: Wed Mar 12 17:34:11 2008
DistroRelease: Ubuntu 8.04
Package: xorg 1:7.3+10ubuntu6
PackageArchitecture: i386
SourcePackage: xorg
Uname: Linux 2.6.24-11-386 i686

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug

-- 
Screen DPI detected incorrectly
https://bugs.launchpad.net/bugs/201491
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