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[iMac <1449282@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

In order to enable X11 forwarding from an external host you must
explicitly set the Xserver to listen by overriding the xserver-command.
Previously you could set the xserver-allow-tcp=true and it would do this
automatically.

I would have expected this change in behaviour to show up in
README.Debian.gz but since it did not, perhaps the functionality of the
"xserver-allow-tcp=true" is not working as expected.

Below shows my before (no TCP listener on 6000) and after (TCP listener
on 6000) lightdm.conf to re-enable the listener after the 15.04 upgrade.

Before (14.10):

~$ cat /etc/lightdm/lightdm.conf

[SeatDefaults]
xserver-allow-tcp=true

After (15.04):

~$ cat /etc/lightdm/lightdm.conf

[SeatDefaults]
xserver-command=X -core -listen tcp
xserver-allow-tcp=true

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: lightdm 1.14.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Apr 27 17:33:26 2015
InstallationDate: Installed on 2014-12-18 (130 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
LightdmConfig:
 [SeatDefaults]
 xserver-command=X -core -listen tcp
 xserver-allow-tcp=true
SourcePackage: lightdm
UpgradeStatus: Upgraded to vivid on 2015-04-27 (0 days ago)

** Affects: lightdm (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug third-party-packages vivid

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https://bugs.launchpad.net/bugs/1449282

Title:
  lightdm tcp listen requires additional configuration

Status in lightdm package in Ubuntu:
  New

Bug description:
  In order to enable X11 forwarding from an external host you must
  explicitly set the Xserver to listen by overriding the xserver-
  command.  Previously you could set the xserver-allow-tcp=true and it
  would do this automatically.

  I would have expected this change in behaviour to show up in
  README.Debian.gz but since it did not, perhaps the functionality of
  the "xserver-allow-tcp=true" is not working as expected.

  Below shows my before (no TCP listener on 6000) and after (TCP
  listener on 6000) lightdm.conf to re-enable the listener after the
  15.04 upgrade.

  Before (14.10):

  ~$ cat /etc/lightdm/lightdm.conf

  [SeatDefaults]
  xserver-allow-tcp=true

  After (15.04):

  ~$ cat /etc/lightdm/lightdm.conf

  [SeatDefaults]
  xserver-command=X -core -listen tcp
  xserver-allow-tcp=true

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: lightdm 1.14.0-0ubuntu2
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon Apr 27 17:33:26 2015
  InstallationDate: Installed on 2014-12-18 (130 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  LightdmConfig:
   [SeatDefaults]
   xserver-command=X -core -listen tcp
   xserver-allow-tcp=true
  SourcePackage: lightdm
  UpgradeStatus: Upgraded to vivid on 2015-04-27 (0 days ago)

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