Comment 2 for bug 714429

Here is the error:

Unpacking replacement xkb-data ...
dpkg: regarding .../xserver-xorg-core_2%3a1.9.99.901+git20110131.be3be758-0ubuntu3_i386.deb containing xserver-xorg-core:
 xserver-xorg-core breaks xserver-xorg-video-8
  xserver-xorg-video-geode provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-nv provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-intel provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-chips provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-trident provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-s3 provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-i128 provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-mga provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-neomagic provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-cirrus provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-ark provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-tdfx provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-sisusb provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-rendition provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-vesa provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-glint provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-fbdev provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-savage provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-vmware provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-openchrome provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-s3virge provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-voodoo provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-apm provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-sis provides xserver-xorg-video-8 and is present and installed.
  xserver-xorg-video-v4l provides xserver-xorg-video-8 and is present and installed.
dpkg: error processing /var/cache/apt/archives/xserver-xorg-core_2%3a1.9.99.901+git20110131.be3be758-0ubuntu3_i386.deb (--unpack):
 installing xserver-xorg-core would break existing software

This is rather confusing as apt runs dpkg with --auto-deconfigure