[Bug 1091556] [NEW] dm-crypt passphrase screen shows blank screen 25% of boots

[Leo Barnes]

Public bug reported:

Roughly 25% of the times I boot my computer, I get a completely blank
screen instead of the dm-crypt passphrase prompt. Typing in the
passphrase works buts results in a blank screen when logging into ubuntu
(or kubuntu in my case). This could be resolved by pulling the monitor
plug and plugging it back in again (or probably by switching screens
with CTRL-ALT-F6 /F7 as OP noted).

May be a duplicate of
https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/816267

Computer is a Dell laptop with a monitor plugged in via HDMI on boot.
Unsure exactly which dumps are useful:
$ lsb_release -rd
Description:	Ubuntu 12.04.1 LTS
Release:	12.04
$ apt-cache policy dmsetup
dmsetup:
  Installed: 2:1.02.48-4ubuntu7.1
  Candidate: 2:1.02.48-4ubuntu7.1
  Version table:
 *** 2:1.02.48-4ubuntu7.1 0
        500 http://se.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     2:1.02.48-4ubuntu7 0
        500 http://se.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
$ uname -a
Linux leob-hp 3.2.0-34-generic #53-Ubuntu SMP Thu Nov 15 10:48:16 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
$ sudo dmidecode -s system-product-name
HP Pavilion dv6 Notebook PC

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

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https://bugs.launchpad.net/bugs/1091556

Title:
  dm-crypt passphrase screen shows blank screen 25% of boots

Status in “plymouth” package in Ubuntu:
  New

Bug description:
  Roughly 25% of the times I boot my computer, I get a completely blank
  screen instead of the dm-crypt passphrase prompt. Typing in the
  passphrase works buts results in a blank screen when logging into
  ubuntu (or kubuntu in my case). This could be resolved by pulling the
  monitor plug and plugging it back in again (or probably by switching
  screens with CTRL-ALT-F6 /F7 as OP noted).

  May be a duplicate of
  https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/816267

  Computer is a Dell laptop with a monitor plugged in via HDMI on boot.
  Unsure exactly which dumps are useful:
  $ lsb_release -rd
  Description:	Ubuntu 12.04.1 LTS
  Release:	12.04
  $ apt-cache policy dmsetup
  dmsetup:
    Installed: 2:1.02.48-4ubuntu7.1
    Candidate: 2:1.02.48-4ubuntu7.1
    Version table:
   *** 2:1.02.48-4ubuntu7.1 0
          500 http://se.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       2:1.02.48-4ubuntu7 0
          500 http://se.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
  $ uname -a
  Linux leob-hp 3.2.0-34-generic #53-Ubuntu SMP Thu Nov 15 10:48:16 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
  $ sudo dmidecode -s system-product-name
  HP Pavilion dv6 Notebook PC

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