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[grga ptic <0.gl.gl.gl.gl.0@xxxxxxxxx>]

Public bug reported:

Recently, the following behaviour appeared suddenly:

1) Switch on computer
2) Ubuntu splash screen appears with dots
3) Screen turns black and switches off (no signal)
4) Nothing happens
5) Forcibly restart computer
6) Everything works fine

This happens exactly like this every time I switch on the computer.
Previously I had removed all but the latest kernel [linux-lts-trusty
(3.13.0-48.80~precise1]), but this may be a coincidence because that
kernel started without problems before.

Note 1: My OS starts from an SSD.

Note 2: My graphics card is recognised as Mobility Radeon HD 5430

Note 3: A similar problem also appeared at the same time on an Ubuntu 12.04 LTS 64 bit installed on a different SSD on the same computer: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1441305
However, there I got stuck with a black screen on *every* boot. In the end, changing the display manager to "gdm" fixed the problem.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: lightdm 1.10.5-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-33.44~14.04.1-generic 3.16.7-ckt7
Uname: Linux 3.16.0-33-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.8
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Apr 12 19:41:35 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-07-23 (263 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug trusty

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to lightdm in Ubuntu.
https://bugs.launchpad.net/bugs/1443144

Title:
   Stuck with black screen on every first boot (no signal)

Status in lightdm package in Ubuntu:
  New

Bug description:
  Recently, the following behaviour appeared suddenly:

  1) Switch on computer
  2) Ubuntu splash screen appears with dots
  3) Screen turns black and switches off (no signal)
  4) Nothing happens
  5) Forcibly restart computer
  6) Everything works fine

  This happens exactly like this every time I switch on the computer.
  Previously I had removed all but the latest kernel [linux-lts-trusty
  (3.13.0-48.80~precise1]), but this may be a coincidence because that
  kernel started without problems before.

  Note 1: My OS starts from an SSD.

  Note 2: My graphics card is recognised as Mobility Radeon HD 5430

  Note 3: A similar problem also appeared at the same time on an Ubuntu 12.04 LTS 64 bit installed on a different SSD on the same computer: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1441305
  However, there I got stuck with a black screen on *every* boot. In the end, changing the display manager to "gdm" fixed the problem.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: lightdm 1.10.5-0ubuntu1
  ProcVersionSignature: Ubuntu 3.16.0-33.44~14.04.1-generic 3.16.7-ckt7
  Uname: Linux 3.16.0-33-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Apr 12 19:41:35 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-07-23 (263 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  SourcePackage: lightdm
  UpgradeStatus: No upgrade log present (probably fresh install)

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