[Bug 1190425] Re: lightdm should allow packages to override defaults in /etc/lightdm/lightdm.conf

[Robert Ancell]

I'm assuming since Quantal and Raring are so close to end-of-life (April
2014 and January 2014 respectively) that it is unlikely that anyone will
upgrade from precise to these releases and thus loose this feature. If
you are on this releases you can always compile the packages with this
support yourself from lp:lightdm/1.4 and lp:lightdm/1.6.

** No longer affects: lightdm (Ubuntu Quantal)

** No longer affects: lightdm (Ubuntu Raring)

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https://bugs.launchpad.net/bugs/1190425

Title:
  lightdm should allow packages to override defaults in
  /etc/lightdm/lightdm.conf

Status in Light Display Manager:
  Fix Released
Status in Light Display Manager 1.2 series:
  Fix Committed
Status in Light Display Manager 1.4 series:
  Fix Committed
Status in Light Display Manager 1.6 series:
  Fix Committed
Status in “lightdm” package in Ubuntu:
  Fix Released
Status in “lightdm” source package in Precise:
  Triaged

Bug description:
  [Impact]
    The /etc/lightdm/lightdm.conf file is a conffile, which means that packages are not allowed to modify it. 

    As a result, if any package is modifying /etc/lightdm/lightdm.conf
  on installation to set 'greeter-show-manual-login=true', will cause
  users of this package to have conffile prompts on future upgrades.

  It would be helpful if lightdm had some supported mechanism for
  packages to override the defaults in /etc/lightdm/lightdm.conf - such
  as an /etc/lightdm/lightdm.conf.d directory .

  [Test Case]
    * Create autologin file, as shown below. This will fail on precise, but work fine on saucy/trusty.

    $ cat  /etc/lightdm/lightdm.conf.d/10-ubuntu.conf
    [SeatDefaults]
    autologin-user=ubuntu-or-any-other-user-on-system

  [Regression Potential]
    * none that I could see, and is backport from upstream

  [Other Info]
    * Has been tested, and works.
    * Merge https://code.launchpad.net/~lightdm-team/lightdm/1.2 against precise

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