[Bug 1307546] Re: dist-upgrade from 12.04 -> 14.04 axes /etc/X11/xorg.conf

[Thomas Mashos]

** Tags added: downstream

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https://bugs.launchpad.net/bugs/1307546

Title:
  dist-upgrade from 12.04 -> 14.04 axes /etc/X11/xorg.conf

Status in Mythbuntu, Ubuntu derivative focused upon MythTV:
  Confirmed
Status in ubuntu-drivers-common package in Ubuntu:
  Fix Released
Status in ubuntu-release-upgrader package in Ubuntu:
  Invalid
Status in ubuntu-drivers-common source package in Trusty:
  Fix Released
Status in ubuntu-release-upgrader source package in Trusty:
  Invalid

Bug description:
  [Impact] 
   * Upon upgrading to Ubuntu 14.04 from an earlier LTS release the user's xorg.conf is renamed.  Any custom settings they've made will be removed.

   * Specifically for Mythbuntu 12.04 LTS users with NVIDIA graphics,
  they have a custom DPI setting that gets removed upon upgrade to
  14.04.

   * This has been fixed in utopic by testing if it's the first time
  that ubuntu-drivers has ran.  If so, it sets a first boot flag so that
  no settings are removed.

  [Test Case]

   * This can be reproduced by installing a 12.04 based release,
  creating an xorg.conf and upgrading to 14.04.  If the xorg.conf is
  renamed then the bug is hit.

   * This can also be reproduced directly on 14.04 by removing /var/lib
  /ubuntu-drivers-common/last_gfx_boot, creating an xorg.conf and
  rebooting.  This would simulate the same behavior.

  [Regression Potential]

   * Part of the intention of ubuntu-drivers-common is to prevent
  problems on people who have upgraded and now have hybrid graphics
  supported cards.  This won't make their situation any worse than
  previously it would have been before ubuntu-driver-common existed.

   * Any functional users in the field should still remain functional.
  This only affects the first boot scenario.

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