unity8-desktop doesn't render since the 0.3 update

[Sebastien Bacher]

Using current utopic, starting an unity8-mir session from unity-greeter works fine with u-s-c 0.0.2+14.10.20140430.1-0ubuntu1, it stops working when updating to the current version (you get an empty screen with a Mir cursor and nothing else)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Robert Ancell (robert-ancell)]

This is due to a change in unity-system-compositor. Previously the first client to connect to u-s-c would be set to active (i.e. visible and controllable by input). The new behaviour is this client is only active if u-s-c is explicitly told to do so. When running a unity seat (i.e. on the phone) lightdm would do this for all sessions. When running Mir sessions from an X seat (i.e. on the desktop) it was not doing this.

Fix is in LightDM to set active session in both cases.

[Launchpad Janitor (janitor)]

This bug was fixed in the package lightdm - 1.11.3-0ubuntu1

---------------
lightdm (1.11.3-0ubuntu1) utopic; urgency=medium

  * New upstream release:
    - Fix Mir sessions broken with unity-system-compositor 0.3.
    - Add back Vala bindings for LightDM.Greeter.connect_sync - just mark as
      deprecated.
    - Put unity-system-compositor's mir_socket under /run rather than /tmp.
      (LP: #1325995)
    - Fix building with clang (3.5) and -Werror.
    - Correct section name in default users.conf file.
 -- Robert Ancell <email address hidden> Thu, 05 Jun 2014 16:07:14 +1200