This bug was fixed in the package lightdm - 1.14.4-0ubuntu1
---------------
lightdm (1.14.4-0ubuntu1) vivid; urgency=medium
* New upstream release:
- Handle XDMCP Request packet with no addresses. (LP: #1516831)
- Don't start LightDM if the XDMCP server is configured with a key that
doesn't exist. (LP: #1517685)
- Add IP addresses to XDMCP log messages.
- Refactor XDMCP error handling.
- Add more tests.
-- Robert Ancell <robert.anc...@canonical.com> Fri, 20 Nov 2015
16:01:15 +1300
** Changed in: lightdm (Ubuntu Vivid)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1449282
Title:
xserver-allow-tcp=true feature doesn't work with Xorg version 1.17.0
Status in Light Display Manager:
Fix Released
Status in Light Display Manager 1.10 series:
Fix Committed
Status in Light Display Manager 1.14 series:
Fix Released
Status in Light Display Manager 1.16 series:
Fix Released
Status in Light Display Manager 1.2 series:
Won't Fix
Status in lightdm package in Ubuntu:
Fix Released
Status in lightdm source package in Trusty:
Fix Released
Status in lightdm source package in Vivid:
Fix Released
Status in lightdm source package in Wily:
Fix Released
Bug description:
[Impact]
xserver-allow-tcp=true option no longer works with X.org 1.17.
[Test Case]
1. Edit /etc/lightdm/lightdm.conf and set [SeatDefaults]
xserver-allow-tcp=true
2. Start LightDM
3. Attempt to connect to the X server using TCP
Expected result:
Able to connect
Observed result:
Unable to connect
[Regression potential]
Low. X.org changed their default behaviour from listen by default to listen
if "-listen tcp" is passed as a command line flag. This is just the equivalent
change in LightDM. Since this is a new flag to X.org if a user was to use
another X server there is a risk it would not understand that flag. However it
seems unlikely since X.org is the only actively developed X server.
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