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[Bug 875801] Re: Linux power regression is not improved from Natty to Oneiric to Precise to Quantal - Netbook Zareason Terra HD


Dragoneyes, this bug was reported a while ago and there hasn't been any
activity in it recently. We were wondering if this is still an issue? If
so, could you please test for this with the latest development release
of Ubuntu? ISO images are available from http://cdimage.ubuntu.com
/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:

where VERSION-NUMBER is the version number of the kernel you tested. For example:

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:

If the mainline kernel does not fix this bug, please add the following tags:

As well, please remove the tag:

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your

** Tags added: needs-upstream-testing

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

** Changed in: linux (Ubuntu)
       Status: Triaged => Incomplete

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  Linux power regression is not improved from Natty to Oneiric to
  Precise to Quantal - Netbook Zareason Terra HD

Status in The Linux Kernel:
  Fix Released
Status in “linux” package in Ubuntu:

Bug description:
  I' m opening this bug as continuation of bug #760131 [https://bugs.launchpad.net/ubuntu/+source/linux/+bug/760131]  (comment 188),  since the power consumption in Ubuntu 11.10  is not really reduced, so the power regression in kernel 3.0.0-12 is not fixed for my hardware. Powertop shows a  reduction of about 1W (from about 8W to 7W), but battery life is not really improved. Actually, battery (6 cell, Soltech PT20) life is 4h30', but it should be 6h. I'm on a Zareason Terra HD netbook [https://zareason.com/shop/Terra-HD.html], with 3G modem, 1Gb Ram, 40Gb SSD.
  This is a fresh installation on Oneiric (not an upgrade).
  I'm also adding a lshw output.
  Ask me for any more needed information.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-12-generic 3.0.0-12.20
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 1.23-0ubuntu3
  Architecture: i386
   /dev/snd/controlC0:  stiu       1471 F.... pulseaudio
   /dev/snd/controlC1:  stiu       1471 F.... pulseaudio
  CRDA: Error: [Errno 2] File o directory non esistente
   Card hw:0 'Intel'/'HDA Intel at 0x40100000 irq 47'
     Mixer name	: 'Realtek ALC662 rev1'
     Components	: 'HDA:10ec0662,10ec0662,00100101'
     Controls      : 17
     Simple ctrls  : 10
   Card hw:1 'Camera'/'Vimicro Corp. Venus USB2.0 Camera at usb-0000:00:1d.7-7, high speed'
     Mixer name	: 'USB Mixer'
     Components	: 'USB0ac8:3420'
     Controls      : 2
     Simple ctrls  : 1
   Simple mixer control 'Mic',0
     Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
     Capture channels: Mono
     Limits: Capture 0 - 48
     Mono: Capture 38 [79%] [11.00dB] [on]
  Date: Sun Oct 16 17:33:07 2011
  HibernationDevice: RESUME=UUID=9b27c5c0-6de2-4182-bb77-46dca18e8a94
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
  MachineType: Zareason  Corporation PT20
   PATH=(custom, no user)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=9c74d7b3-3d06-4494-b399-4395aac9cbc4 ro quiet splash vt.handoff=7
   linux-restricted-modules-3.0.0-12-generic N/A
   linux-backports-modules-3.0.0-12-generic  N/A
   linux-firmware                            1.60
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/10/2010
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: PT20_B1.1.216_E1.1.351_P0
  dmi.board.asset.tag: Not Applicable
  dmi.board.name: PT20
  dmi.board.vendor: Zareason  Corporation
  dmi.board.version: MP
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 1
  dmi.chassis.vendor: Zareason  Corporation
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrPT20_B1.1.216_E1.1.351_P0:bd03/10/2010:svnZareasonCorporation:pnPT20:pvrMP:rvnZareasonCorporation:rnPT20:rvrMP:cvnZareasonCorporation:ct1:cvrN/A:
  dmi.product.name: PT20
  dmi.product.version: MP
  dmi.sys.vendor: Zareason  Corporation

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