[Bug 1459299] Re: ASUS Laptop black screen during boot / F2 key showing why

[Daniel Sobrinho]

Hi,

Following my hardware configuration.

Kernel Version:
Linux anunnaki 3.19.0-32-generic #37-Ubuntu SMP Wed Oct 21 10:23:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

daniels at anunnaki:~$  sudo lshw -C display; lsb_release -a; uname -a
 *-display               
       descrição: VGA compatible controller
       produto: BeaverCreek [Radeon HD 6520G]
       fabricante: Advanced Micro Devices, Inc. [AMD/ATI]
       ID físico: 1
       informações do barramento: pci at 0000:00:01.0
       versão: 00
       largura: 32 bits
       clock: 33MHz
       capacidades: pm pciexpress msi vga_controller bus_master cap_list rom
       configuração: driver=radeon latency=0
       recursos: irq:37 memória:b0000000-bfffffff porta de E/S:f000(tamanho=256) memória:ff700000-ff73ffff
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 15.10
Release:	15.10
Codename:	wily

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Title:
  ASUS Laptop black screen during boot / F2 key showing why

Status in plymouth package in Ubuntu:
  New

Bug description:
  After upgrading from  Ubuntu 14.04.1 LTS to  Ubuntu 14.04.2 LTS

  Black screen during booting.
  Using: Ubuntu 14.04.2 LTS / Laptop ASUS K70AC - 500Gb Hard-disc (crypted)

  After started booting the screen turns to the Ubuntu colors for a
  second and then turns to solid black and nothing happens after that.

  I noticed that, when I quickly tuned off the power (battery -by
  removal- and mains) and then reinstalling and pressing the power
  button, the system showed me the GRUB choice with different Linux
  versions.

  Clicking the first (is newest) Linux version completed the booting.

  After having done this many times (no update for this bug so far), I clicked
  the F2 button (ASUS uses this key to get into the BIOS) while the screen was black, just to see what would happen.

  To my surprise my screen showed the following text (white font on
  black screen):

  Unlocking the disk /dev/disk/by-uuid/d9f96786-fec8-4889-b05e-96fcaffa6437 (sda5-crypt)
  Enter passphrase:

  After entering my passphrase Ubuntu completed the booting in the usual
  way!

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.7
  ProcVersionSignature: Ubuntu 3.16.0-38.52~14.04.1-generic 3.16.7-ckt10
  Uname: Linux 3.16.0-38-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.11
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Wed May 27 17:19:39 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-05-16 (10 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: dist-upgrade
  UpgradeStatus: No upgrade log present (probably fresh install)

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