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[Karl Hunt <karlgeorgehunt@xxxxxxxxx>]

I noticed that during boot I get the message "Disabling IRQ 16" so
checked out debugging IRQ porblems.

https://help.ubuntu.com/community/DebuggingIRQProblems

I tried all of the examples and none had any effect except irqpoll which
allowed the mouse to move but the rest of the system still locked up.

I did however notice that in 13.04 the lock up does not start until
login. If I leave the machine at the login screen it is ok (mouse and
keyboard input is ok and menus work fine with no lag). Shortly after
logging in however the machine completely locks up and needs  either the
battery or power cord taking out to "fix"

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https://bugs.launchpad.net/bugs/1217367

Title:
  E5420 Laptop freezes whilst charging and below 90% battery (approx)
  13.04 12.04 10.04

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  My Dell Latitude E5420 hangs when the power cord is in and the battery
  is charging and below 90%. This bug has existed in 10.04 and every
  version since. There used to be a work around:

  echo N> /sys/module/drm_kms_helper/parameters/poll

  but this no longer works in raring ringtail. Also before 13.04 I was
  able to still barely use the system and perform the above command but
  now the system locks up entirely until the batter is removed.

  I am currently using an up to date ringtail installation.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-29-generic 3.8.0-29.42
  ProcVersionSignature: Ubuntu 3.8.0-29.42-generic 3.8.13.5
  Uname: Linux 3.8.0-29-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  karlhunt   2195 F.... pulseaudio
  CRDA:
   country GB:
   	(2402 - 2482 @ 40), (N/A, 20)
   	(5170 - 5250 @ 40), (N/A, 20)
   	(5250 - 5330 @ 40), (N/A, 20), DFS
   	(5490 - 5710 @ 40), (N/A, 27), DFS
  Date: Tue Aug 27 14:29:46 2013
  HibernationDevice: RESUME=UUID=8e3061b3-2966-432b-afcc-f8e5b61c4dde
  InstallationDate: Installed on 2013-06-21 (67 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  Lsusb:
   Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 005: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
  MachineType: Dell Inc. Latitude E5420
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-29-generic root=UUID=e2a067db-5091-4705-b366-5010191aa820 ro persistent quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-29-generic N/A
   linux-backports-modules-3.8.0-29-generic  N/A
   linux-firmware                            1.106
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/20/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A01
  dmi.board.name: 0H5TG2
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA01:bd04/20/2011:svnDellInc.:pnLatitudeE5420:pvr01:rvnDellInc.:rn0H5TG2:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E5420
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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