[Bug 1005766] Re: System boot hangs

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: upstart (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1005766

Title:
  System boot hangs

Status in “mdadm” package in Ubuntu:
  Confirmed
Status in “upstart” package in Ubuntu:
  Confirmed

Bug description:
  Since I installed 12.04 on my system, I have had the following problem
  consistently.

  I first tried to upgrade an installation on a mda raid1 partition,
  which simply would not boot. I then did a clean install of 12.04 on a
  normal ext4 partition, but I still have a mda raid1 with ext4 mounted
  as /home. I regularly install updates.

  Every evening I do a shutdown, since the area I live in has many power
  failures and the UPS would not sustain the machine for longer than 5
  minutes. In the morning when I start up the pc, I get an all purple
  screen and the hard drive light is inactive. Then I press CTRL+AL+DEL
  to reboot the pc. Once it reboots, the GRUB menu appears and it starts
  to boot, but it informs me that the raid is not consistent, so I have
  the choice to continue booting with a degraded raid. I then select
  "yes". By the time I am logged in, the raid drive is ok as you can see
  in the following output:

  $ cat /proc/mdstat 
  Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] 
  md2 : active raid1 sdb4[1] sda4[0]
        466366848 blocks [2/2] [UU]
        
  unused devices: <none>

  I then continue working the whole day without a single problem and
  shut down at night, simply to go through the same routine the next
  morning. On one or two occasions it booted up without the grub menu
  (as if it was in sleep or hibernate mode). This leads me to believe
  that a normal shutdown (either by gnome shutdown or the command line
  utility), does not do a proper shutdown, but in stead indicates that a
  sleep or hibernate state should be booted. Also, the fact that the
  raid drive consistently starts up in degraded mode only to be ready
  when I do an mdastat, leaves me to believe the raid drive is not shut
  down properly.

  From reports on the internet about mda problems in 12.04 in standard
  raid tests, I held back on this bug report, but now it is a month
  later and the problem still has not been resolved.

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