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[Warren <1500673@xxxxxxxxxxxxxxxxxx>]

I, too, have this problem. No login screen after upgrade to 15.10 from
15.04.

I have now spent 36 hours trying to get this upgrade to work. I've tried
everything I can find cruising the net. Nothing works. I've gone back
and forth between gdm and lightdm. I've uninstalled and reinstalled
ubuntu-desktop. All that nonsense and a lot more. I've restored file
system backups to the original 15.04 and reapplied the update several
times. Nothing in the syslog to suggest the problem.

At this point I give up. I'm going back to 15.04 and will stay there
until somebody confirms a fix.

The real fix might just be that Canonical  stops with these 6-month
releases that don't work and goes to 1-year releases that do.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gdm in Ubuntu.
https://bugs.launchpad.net/bugs/1500673

Title:
  gdm unusable after upgrading to 15.10

Status in gdm package in Ubuntu:
  Confirmed

Bug description:
  Hi there -- I figured I'd try 15.10 a few days before release, and
  when gdm is the default greeter, I see no login prompt and I have to
  CTRL-ALT-F1 to get to a terminal. As far as I can tell, there's
  nothing interesting in the logs in /var/log or /var/log/gdm. I just
  get a blank, black screen.

  As a side note, I'm seeing the error messages described in
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1492764, but I
  don't think they are the root cause for a missing X-server (AFAICT,
  there's no X server starting).

  Please advice on how I can troubleshoot further. `dkg-reconfigure gdm`
  and choosing lightdm yields a GUI login prompt in lightdm.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: gdm 3.16.2-0ubuntu2
  ProcVersionSignature: Ubuntu 4.2.0-11.13-generic 4.2.1
  Uname: Linux 4.2.0-11-generic x86_64
  ApportVersion: 2.19-0ubuntu1
  Architecture: amd64
  Date: Mon Sep 28 20:15:50 2015
  InstallationDate: Installed on 2014-07-02 (453 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  SourcePackage: gdm
  UpgradeStatus: Upgraded to wily on 2015-09-29 (0 days ago)

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