This is a stable update in the 1.18 series that fixes a regression
introduced in 1.18.2. It also adds support for in-session greeters.
Overview of changes in lightdm 1.18.3
* Fix error that caused stdin to be closed. This seems to have lots of
bad
side effects (greeter not working correctly, multi-seat failing).
* Add support for greeters running inside sessions. This is enabled by
setting X-LightDM-Allow-Greeter inside the session .desktop file.
The session can then use liblightdm to connect one greeter to the
daemon. The communication is done using a socket
(/var/run/lightdm/<user>/greeter-socket) that is accessible to any
process run by that user. Consider controlling access to this socket
using a MAC system such as AppArmor.
* Fix various memory management issues exposed by the use of in-session
greeters.
https://launchpad.net/lightdm/+download
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