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[Galen Thurber <galen@xxxxxxxxxxxxxxx>]

Public bug reported:

I have two xubuntu computers with similar problem
https://answers.launchpad.net/ubuntu/+question/259325
https://answers.launchpad.net/ubuntu/+question/259025
One is a desktop and the bug happens with kernel
3.2.0-74-generic
while kernel
3.2.0-72-generic is ok
Xubuntu 12.04-current
memtest ok
disk test ok
grub is xubuntu installed
splash is disabled, verbose is on, 

Second is a laptop
3.2.0-74-generic is unstable
3.2.0-72-generic is unstable
Xubuntu 12.04-current
memtest ok
disk test ok
grub is xubuntu installed
splash is disabled, verbose is on, 
laptop runs LinuxLite2.0 and Sparky without this error

I'm stating this bug report from the desktop.
apport on this machine is also unstable, it crashes often

The broken pipe error appears before lightDM finishes take over of screen and on reboot.
sysreq screen out is not accessable due to no console being available.
Tried sysreq inside a logged into console  but nothing seems to be logged once a console is opened and reboot is initiated from inside user's Xfce.
Note: reboot & shutdown under login screen are not working if kernel 3.2.0-74 is booted. -72 works fine

I've been checking dmesg output.

Once the system shows the broken pipe error (which seems to be 10/10 boots) the system becomes unstable in time
resulting in at times a kernel panic with keyboard LEDs

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: lightdm 1.2.3-0ubuntu2.5
ProcVersionSignature: Ubuntu 3.2.0-72.107-generic 3.2.64
Uname: Linux 3.2.0-72-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.8
Architecture: amd64
Date: Mon Dec 22 10:05:21 2014
InstallationMedia: Xubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
MarkForUpload: True
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug precise

** Attachment added: "dmesg from 3.2.0-72"
   https://bugs.launchpad.net/bugs/1404902/+attachment/4285861/+files/dmesg

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https://bugs.launchpad.net/bugs/1404902

Title:
  could not write bytes broken pipe 3.2.0-74 3.2.0-72

Status in lightdm package in Ubuntu:
  New

Bug description:
  I have two xubuntu computers with similar problem
  https://answers.launchpad.net/ubuntu/+question/259325
  https://answers.launchpad.net/ubuntu/+question/259025
  One is a desktop and the bug happens with kernel
  3.2.0-74-generic
  while kernel
  3.2.0-72-generic is ok
  Xubuntu 12.04-current
  memtest ok
  disk test ok
  grub is xubuntu installed
  splash is disabled, verbose is on, 

  Second is a laptop
  3.2.0-74-generic is unstable
  3.2.0-72-generic is unstable
  Xubuntu 12.04-current
  memtest ok
  disk test ok
  grub is xubuntu installed
  splash is disabled, verbose is on, 
  laptop runs LinuxLite2.0 and Sparky without this error

  I'm stating this bug report from the desktop.
  apport on this machine is also unstable, it crashes often

  The broken pipe error appears before lightDM finishes take over of screen and on reboot.
  sysreq screen out is not accessable due to no console being available.
  Tried sysreq inside a logged into console  but nothing seems to be logged once a console is opened and reboot is initiated from inside user's Xfce.
  Note: reboot & shutdown under login screen are not working if kernel 3.2.0-74 is booted. -72 works fine

  I've been checking dmesg output.

  Once the system shows the broken pipe error (which seems to be 10/10 boots) the system becomes unstable in time
  resulting in at times a kernel panic with keyboard LEDs

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: lightdm 1.2.3-0ubuntu2.5
  ProcVersionSignature: Ubuntu 3.2.0-72.107-generic 3.2.64
  Uname: Linux 3.2.0-72-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu17.8
  Architecture: amd64
  Date: Mon Dec 22 10:05:21 2014
  InstallationMedia: Xubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
  MarkForUpload: True
  SourcePackage: lightdm
  UpgradeStatus: No upgrade log present (probably fresh install)

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