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[N0000b-n000b <1034002@xxxxxxxxxxxxxxxxxx>]

maybe the same issue? https://bugs.freedesktop.org/show_bug.cgi?id=42960

also, isn't pm-utils somehow deprecated?
if we add the parameter in /etc/pm/config.d/ will the command "systemctl suspend" be able to turn on the screen? i think that "systemctl suspend" doesn't rely on pm-utils

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https://bugs.launchpad.net/bugs/1034002

Title:
  1002:9641 [Lenovo ThinkPad E525] Screen black on resume

Status in Direct Rendering Infrastructure:
  Confirmed
Status in The Linux Kernel:
  Fix Released
Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  I did the kernel smoke test for the quantal kernel on precise.

  I can suspend and resume however when I resume I the screen stays
  black. It looks like the backlight isn't coming on, but it's noteable
  that I don't see anything on my external screen either. I can see
  consoles on my external monitor (over HDMI) and if I disconnect the
  HDMI cable and reconnect it then I am also able to see my Unity
  session on that screen. This issue is present with both the quantal
  kernel and the stock 12.04 one.

  WORKAROUND: Use fglrx.

  ---
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
  ApportVersion: 2.0.1-0ubuntu12
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 1: Generic_1 [HD-Audio Generic], device 0: CONEXANT Analog [CONEXANT Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  tealeg     2861 F.... pulseaudio
   /dev/snd/controlC0:  tealeg     2861 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Generic'/'HD-Audio Generic at 0xf0b44000 irq 48'
     Mixer name	: 'ATI R6xx HDMI'
     Components	: 'HDA:1002aa01,00aa0100,00100200'
     Controls      : 6
     Simple ctrls  : 1
  Card0.Amixer.values:
   Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  Card1.Amixer.info:
   Card hw:1 'Generic_1'/'HD-Audio Generic at 0xf0b40000 irq 16'
     Mixer name	: 'Conexant CX20590'
     Components	: 'HDA:14f1506e,17aa21ea,00100002'
     Controls      : 18
     Simple ctrls  : 10
  Card29.Amixer.info:
   Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown'
     Mixer name	: 'ThinkPad EC (unknown)'
     Components	: ''
     Controls      : 1
     Simple ctrls  : 1
  Card29.Amixer.values:
   Simple mixer control 'Console',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  DistroRelease: Ubuntu 12.04
  HibernationDevice:
   # RESUME=/dev/sda5
   RESUME='UUID=61453936-e394-41de-8b00-5ee8f17023b3'
  InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Alpha amd64 (20111129)
  MachineType: LENOVO 12002KG
  Package: linux 3.2.0.27.29
  PackageArchitecture: amd64
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-7-generic root=UUID=c2742c1e-158f-446d-9884-d6f037d7fa8c ro quiet splash elevator=deadline
  ProcVersionSignature: Ubuntu 3.5.0-7.7~precise1-generic 3.5.0
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-7-generic N/A
   linux-backports-modules-3.5.0-7-generic  N/A
   linux-firmware                           1.79
  Tags:  precise running-unity
  Uname: Linux 3.5.0-7-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip kvm libvirtd lpadmin plugdev sambashare sudo
  WifiSyslog:

  dmi.bios.date: 07/28/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8IET34WW(1.07)
  dmi.board.asset.tag: Not Available
  dmi.board.name: 12002KG
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr8IET34WW(1.07):bd07/28/2011:svnLENOVO:pn12002KG:pvrThinkPadE525:rvnLENOVO:rn12002KG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 12002KG
  dmi.product.version: ThinkPad E525
  dmi.sys.vendor: LENOVO

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