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[Launchpad Bug Tracker <678421@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package lightdm - 1.13.0-0ubuntu1

---------------
lightdm (1.13.0-0ubuntu1) vivid; urgency=medium

  * New upstream release:
    - Fix crash when having configuration keys defined in multiple places
      (LP: #1377373)
    - Fix pipe file descriptor leak for each session login / authentication
      (LP: #1190344)
    - Use correct syntax for DesktopNames key in session files (LP: #1383321)
    - Match seat configuration with globbing (LP: #1364911)
    - Allow user switching in multi-seat until bug stopping greeter showing on
      logout is fixed
    - Disable log message when AccountsService users change (LP: #1376357)
    - Update AppArmor scripts, requires AppArmor 2.9
    - Update tests to run better on servers
  * debian/config-error-dialog.sh:
    - Show warning dialog instead of interrupted login if syntax error in
      ~/.profile etc (LP: #678421)
 -- Robert Ancell <robert.ancell@xxxxxxxxxxxxx>   Thu, 13 Nov 2014 11:08:17 +1300

** Changed in: lightdm (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/678421

Title:
  Error message for a faulty ~/.profile script

Status in GDM: The Gnome Display Manager:
  New
Status in “gdm” package in Ubuntu:
  In Progress
Status in “lightdm” package in Ubuntu:
  Fix Released
Status in “gdm” source package in Trusty:
  Triaged
Status in “lightdm” source package in Trusty:
  In Progress
Status in “gdm” source package in Utopic:
  Triaged
Status in “lightdm” source package in Utopic:
  In Progress

Bug description:
  trusty and utopic SRU requests
  ==============================

  [Impact]

  In case of a syntax error in either of ~/.profile or a few other
  similar files, the Xorg login is interrupted, and the user is taken
  back to the login screen without an explanation. Debugging this
  problem may be a time consuming exercise, especially for non-
  experienced users.

  With the proposed change, lightdm/gdm does not try to load such a
  file, but shows a warning dialog instead. (A warning dialog is also
  shown in case of some other type of error, which would not have caused
  the login to fail.)

  [Test Case]

  To reproduce:

  * Edit ~/.profile and add something bad, e.g. a non-closed parenthesis.
  * Log out and find that you can't log in to a graphical session.

  After installing the proposed lightdm/gdm version, you'll instead see
  the dialog and can log in.

  [Regression Potential]

  Since this is only about improved exception handling, it does not at
  all affect users with correct configuration files. The regression risk
  ought to be minimal.

  [Original description]

  Binary package hint: gdm

  After adding "function AddPath { PATH="$1:$PATH" }" to $HOME/.profile
  made the Xorg startup fail. (At that moment I had already forgotten
  the changes made to the .profile). As I had autologin that meant it
  kept trying to login and finally showed me the graphics
  reconfiguration screen. That sent me to a huge hunt for xorg conf and
  setup problems.

  Anyway finally tracked this down. I had used bash syntax in .profile
  file whereas it was run with sh.

  This is not a bug per se but I think a user mistake in ".profile"
  shouldn't bring the whole xorg startup to a halt as it does with
  autologin. I propose running user ".profile" and ".xprofile" scripts
  so that Xsession script continues running even if they have errors.
  I'm not sure whether this change would have some negative effects as
  well.

  1) Ubuntu Lucid, Linux egon-laptop 2.6.32-25-generic #45-Ubuntu SMP Sat Oct 16 19:48:22 UTC 2010 i686 GNU/Linux
  2) gdm 2.30.2.is.2.30.0-0ubuntu4

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