Public bug reported:

Binary package hint: xorg

Xorg in Hardy beta seems to use wrong resolution (DPI) when two monitors
are connected, but one of them is disabled. This results in e.g. wrong
aspect ratio of videos in totem (see
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/198054). I think
this bug is the same as here (status invalid):
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/38946.

When one monitor is disabled, xdpyinfo shows

screen #0:
  dimensions:    1920x1200 pixels (1049x331 millimeters)
  resolution:    46x92 dots per inch

which is obviously wrong. With both monitors enabled

screen #0:
  dimensions:    3840x1200 pixels (1049x331 millimeters)
  resolution:    93x92 dots per inch

and everything works correctly.

Also, Xorg.0.log has a line

(--) NVIDIA(0): DPI set to (93, 92); computed from "UseEdidDpi" X config

Note that I'm using NVidia drivers (171.06 beta) with twinview enabled.
Prior to upgrading to hardy this issue did not exist, so I don't think
that this is an NVidia bug.

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

-- 
Wrong dpi in hardy when second monitor is disabled
https://bugs.launchpad.net/bugs/206984
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