Public bug reported:
Hello.
I upgraded my laptop from 14.04 to 16.04 (Ubuntu 16.04.1 LTS) a few days
ago. Since then, the login screen doe not appear anymore when I have a
dual monitor (either connected to VGA port or docked via VGA or HDMI),
both screen are black, showing only the cursor.
When I switch back to one monitor (disconnecting the VGA monitor or
undocking), the laptop turns to sleep (?!?). After waking it up, I got
the screen, can login, connect back the second monitor and activate it
(with xrandr).
If I connect the second monitor when the computer sleeps, and wake it
up, I then have the display, but without the login window (it appears as
soon as I disconnect the monitor).
The software lightdm is up to date (1.18.2-0ubuntu1).
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: lightdm 1.18.2-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Aug 6 16:50:11 2016
InstallationDate: Installed on 2013-07-29 (1104 days ago)
InstallationMedia: Xubuntu 13.04 "Raring Ringtail" - Release amd64 (20130423.1)
SourcePackage: lightdm
UpgradeStatus: Upgraded to xenial on 2016-07-30 (6 days ago)
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
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https://bugs.launchpad.net/bugs/1610543
Title:
After upgrading to 16.04, greeter does not handle double screen
anymore
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