[Bug 575333] Re: On boot keeps trying to mount "UDEVD-WORK..../dev/null"

[BentFX]

There are certainly at least two different issues being discussed here.
There are those who get the udev-work - /dev/null error and boot
continues without error(possibly with a delay) and there are those who
see the error message and boot fails. There are those who see the error
on every boot, and those who only see the error part of the time.

Here is my observation regarding my part time, still boots, udev-work
error. I recreated my /dev/null as a static node similar to what's
described in #75 and it seems to have solved my issue. As for the
proposed mdadm fix I don't think it is a direct fix, but rather causes a
shift in boot processes that eliminates the race that causes /dev/null
to not be ready when requested. Bear with me as I explain...

The udev-work error happens early in the boot process. It is almost
surely a udev thread trying to access /dev/null before another udev
thread has created the node. Since it only happens sometimes it would
indicate that most of the time the threads are timed correctly and the
node is ready when requested. mdadm is a RAID array administration tool.
/dev/null is not a disk, and it is almost certainly not a RAID array!
Though by installing mdadm you have placed another process into the
early boot sequence and this can, and probably does affect the timing of
other early boot processes, allowing the udev processes to sync
correctly.

As for those who have recently upgraded and now cannot boot, it would
certainly appear to be a real issue, but though you do see a udev error
message, my guess is the issue goes deeper than udev.

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https://bugs.launchpad.net/bugs/575333

Title:
  On boot keeps trying to mount "UDEVD-WORK..../dev/null"

Status in “linux” package in Ubuntu:
  Confirmed
Status in “udev” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: firefox

  After online Upgrade Ubuntu 10 -> 10.04....

  On boot keeps trying to mount "UDEVD-WORK..../dev/null" which fails
  because it does not exist.

  Forum thread says this is a fstab file problem. Various suggested
  fixes do not work.

  System Info:

  Ubuntu 10.04 (lucid)

  GROME 2.30.0 (Ubuntu 2010-03-31)
  Kernal  2.6.32-21-generic
  OS Type  Linux
  GCC 4.4.3 (i486-linux-gnu)

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: firefox 3.6.5~hg20100429r34148+nobinonly-0ubuntu1~umd1
  ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
  Uname: Linux 2.6.32-21-generic i686
  Architecture: i386
  CrashDB: ubuntu
  Date: Tue May  4 11:36:14 2010
  FirefoxPackages:
   firefox 3.6.5~hg20100429r34148+nobinonly-0ubuntu1~umd1
   firefox-gnome-support 3.6.5~hg20100429r34148+nobinonly-0ubuntu1~umd1
   firefox-branding 3.6.5~hg20100429r34148+nobinonly-0ubuntu1~umd1
   abroswer N/A
   abrowser-branding N/A
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: firefox
  ThirdParty: True

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