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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

This bug was nominated against a series that is no longer supported, ie
quantal.  The bug task representing the quantal nomination is being
closed as Won't Fix.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu Quantal)
       Status: Triaged => Won't Fix

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https://bugs.launchpad.net/bugs/995005

Title:
  C-state C3 does not work after disconnecting the AC power from
  notebook

Status in The Linux Kernel:
  Fix Released
Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Precise:
  Triaged
Status in “linux” source package in Quantal:
  Won't Fix

Bug description:
  On my Samsung NC20 Netbook the BIOS hides the C3 C-state when the AC
  power is connected, but it should show up and work as soon as the AC
  power is disconnected.

  This expected behavior worked fine as long as I used Oneiric. But now
  I upgraded to Precise and now C3 does not work anymore after
  disconnecting the AC power.

  I have verified, that booting the Oneiric kernel 3.0.0-19.33 instead
  of the Precise Kernel 3.2.0-24.37 (same userspace) fixes the problem.

  To gather some information, I executed this command with the Precise kernel
    grep -r "" /sys/devices/system/cpu/cpu0/cpuidle/
  in different system states:
  1. newly booted without having the AC power attached
  2. having the AC power attached (without C3, as expected)
  3. now after having the AC power disconnected (not functional C3 --> bug)

  The output is combined in the attached file "cpuidle.txt".
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: VT82xx [HDA VIA VT82xx], device 0: ALC272 Analog [ALC272 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu7
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: VT82xx [HDA VIA VT82xx], device 0: ALC272 Analog [ALC272 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  schlicht   2920 F.... kded4
                        schlicht   3190 F.... kmix
  Card0.Amixer.info:
   Card hw:0 'VT82xx'/'HDA VIA VT82xx at 0xf5400000 irq 67'
     Mixer name	: 'Realtek ALC272'
     Components	: 'HDA:10ec0272,144dc04e,00100001'
     Controls      : 18
     Simple ctrls  : 10
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=/dev/sda6
  MachineType: SAMSUNG ELECTRONICS CO., LTD. NC20/NB20
  Package: linux 3.2.0.24.26
  PackageArchitecture: i386
  ProcEnviron:
   LANGUAGE=de_DE
   TERM=xterm
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic-pae root=UUID=28a00041-0781-44a2-8a24-684926bf9ea9 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-24-generic-pae N/A
   linux-backports-modules-3.2.0-24-generic-pae  N/A
   linux-firmware                                1.79
  Tags:  precise
  Uname: Linux 3.2.0-24-generic-pae i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  dmi.bios.date: 11/25/2009
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: 10MQ
  dmi.board.name: NC20/NB20
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr10MQ:bd11/25/2009:svnSAMSUNGELECTRONICSCO.,LTD.:pnNC20/NB20:pvr04MQ:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNC20/NB20:rvr:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:
  dmi.product.name: NC20/NB20
  dmi.product.version: 04MQ
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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