Public bug reported:
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)
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade trusty
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https://bugs.launchpad.net/bugs/1459299
Title:
ASUS Laptop black screen during boot / F2 key showing why
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