@penalvch: Yes, I'd be happy to provide an impact statement.

I don't perceive any problems with suspend or resume - it is working
just fine, as it does on my Windows laptops (dual boot on the same
system as well as an HP EliteBook work system). The message is
innocuous. It is, however, still happening into v3.2.49, and sometimes
the power discrepancy values are different (I can't remember them off
the top of my head). The error doesn't always appear, either.

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https://bugs.launchpad.net/bugs/1167669

Title:
  [Dell Inspiron 15 N5050] "Power Management Discrepancy" is displayed
  on wakeup

Status in “linux” package in Ubuntu:
  Confirmed
Status in “linux” source package in Precise:
  Incomplete

Bug description:
  Ever since I installed the new kernel, I am seeing this error on the
  text window when I go down for suspend:

  [xxxxxx.yyyyyy] [drm6:rp_sanitize_pm] *ERROR* Power management
  discrepancy: GEN6_RP_INTERRUPT_LIMITS, expected: 1700000, was: 1206000

  where "xxxxxx.yyyyyy" is a set of unpredictable (but increasing)
  6-digit numbers. Is there a setting I need to change in the system to
  make this error go away, or is it a bug in the new kernel?

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-40-generic 3.2.0-40.64
  ProcVersionSignature: Ubuntu 3.2.0-40.64-generic 3.2.40
  Uname: Linux 3.2.0-40-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu17.1
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  hans       1962 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xf7e00000 irq 45'
     Mixer name : 'Intel CougarPoint HDMI'
     Components : 'HDA:111d76d1,10280504,00100205 
HDA:80862805,80860101,00100000'
     Controls      : 23
     Simple ctrls  : 11
  Date: Wed Apr 10 18:50:20 2013
  HibernationDevice: RESUME=UUID=f4fe51bd-1f81-4024-af67-b65e22aac6a4
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 
(20120823.1)
  MachineType: Dell Inc. Inspiron N5050
  MarkForUpload: True
  ProcEnviron:
   LANGUAGE=en_CA:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-40-generic 
root=UUID=3d0bc00a-4e48-432c-b993-410594239191 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-40-generic N/A
   linux-backports-modules-3.2.0-40-generic  N/A
   linux-firmware                            1.79.1
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/03/2012
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 01HXXJ
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A05
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: 
dmi:bvnDellInc.:bvrA05:bd08/03/2012:svnDellInc.:pnInspironN5050:pvrNotSpecified:rvnDellInc.:rn01HXXJ:rvrA05:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: Inspiron N5050
  dmi.product.version: Not Specified
  dmi.sys.vendor: Dell Inc.

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