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[Bug 1394639] [NEW] lightdm fails to start with 3 connected displays but works 2 displays

To: lightdm-gtk-greeter-team@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <1394639@xxxxxxxxxxxxxxxxxx>
Date: Thu, 20 Nov 2014 22:45:46 -0000
Reply-to: Bug 1394639 <1394639@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

You have been subscribed to a public bug:

lightdm fails to start with 3 connected displays but works 2 displays.

Once lightdm has started and displays the Greeter I can connect the third display without a hitch.
After logging in I can enable the third display

#!/bin/sh
xrandr --output VGA-0 --off --output DP-6 --off --output DP-5 --off --output DP-4 --mode 3200x1800 --pos 0x0 --rotate normal --output DP-3 --scale 1.5x1.5 --mode 1920x1200 --pos 3200x0 --rotate normal --output DP-2 --scale 1.5x1.5 --mode 1920x1080 --pos 6080x0 --rotate normal --output DP-1 --off --output DP-0 --off 

When lightdm is started with all three displays connected, it will
terminate and force the Xserver to go down as well, triggering a cycle
of Xserver/lightdm restarts. Disconnecting the 3rd display will bring up
lightdm immediately without a glitch.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: lightdm 1.13.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-25.33-generic 3.16.7
Uname: Linux 3.16.0-25-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.7-0ubuntu10
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Nov 20 14:09:40 2014
InstallationDate: Installed on 2014-05-30 (174 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
LightdmGreeterLog:
 (lightdm-gtk-greeter:7540): GLib-GObject-CRITICAL **: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
 
 (lightdm-gtk-greeter:7540): GLib-GObject-CRITICAL **: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
 
 ** (lightdm-gtk-greeter:7540): WARNING **: Failed to load user image: Failed to open file '/home/neuffer/.face': No such file or directory
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: lightdm-gtk-greeter (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug vivid
-- 
lightdm fails to start with 3 connected displays but works 2 displays
https://bugs.launchpad.net/bugs/1394639
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