ASUS Laptop black screen during boot / F2 key showing why

[rgep@gmx]

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)

[Daniel Sobrinho (dsobrinho)]

Hi,

I have amost the same problem but my laptop is a Dell Inspiron N5110 with AMD. So I noticed that when I close the screen cover and open again, it back image screen requested to enter with my log in. It's like I had let the laptop hibernate.

The workaround was close the screen cover and open again.

I still checking the bugs to see if has a upgrade ou update to fix it.

Best regards,
Daniel

[Daniel Sobrinho (dsobrinho)]

how should use plymouth?

[Daniel Sobrinho (dsobrinho)]

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@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@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