Comment 126 for bug 760131

Jon- absolutely agree. Only way I can figure this isn't getting more
attention is that the majority of datacenters are using enterprise
versions of the kernel, which are several versions back and aren't
affected yet.

Once RHEL version 7 or 8 comes out with 2.6.38 or later, everyone
would get a bit concerned when the power utilization goes up.

FWIW it probably wouldn't affect really busy servers as much, this
seems to really affect power usage when the cpu is lightly loaded or
idle.

On 6/30/11, Jon Grossart <email address hidden> wrote:
> Regression/proper behavior or whatever it ends up being called, there is
> a lot more fixing that needs to be done. What has surprised me about
> the whole Linux community is that no one seems to be really all that
> upset or even tracking the problem as a whole except Phoronix and the
> users. It would seem with the prevalence of laptops that power
> consumption would be a huge priority.
>
> Although, there are tons more servers than laptop running Linux, so
> maybe that is the issue here as well. Although, I would think power
> consumption is an even bigger issue for them (cost wise, not running
> down the battery/burn your lap wise).
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/760131
>
> Title:
> Power consumption raised significantly in natty
>
> Status in Release Notes for Ubuntu:
> Fix Released
> Status in “linux” package in Ubuntu:
> Triaged
> Status in “linux” source package in Natty:
> Incomplete
> Status in “linux” source package in Oneiric:
> Triaged
>
> Bug description:
> This is a regression moving from maverick->natty. With the same sort
> of light interactive usage, Battery life has gone from ~4 hours to
> 2:45 or so.
>
> Running powertop shows the system in P-state "Turbo mode" 10-15% of
> the time. Typically this was almost zero in maverick, 98+% of the
> time maverick was in the lowest state.
>
> wakeups reported in the 5-600/s range where previously (from memory)
> it was 200 ish. i915 driver is high on the list. This is
> irrespective of whether running unity or classic desktop.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 11.04
> Package: linux-image-2.6.38-8-generic 2.6.38-8.42
> Regression: Yes
> Reproducible: Yes
> ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
> Uname: Linux 2.6.38-8-generic x86_64
> AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
> Architecture: amd64
> ArecordDevices:
>  **** List of CAPTURE Hardware Devices ****
>  card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
>    Subdevices: 1/1
>    Subdevice #0: subdevice #0
> AudioDevicesInUse:
>  USER PID ACCESS COMMAND
>  /dev/snd/controlC0: james 2068 F.... pulseaudio
> CRDA: Error: [Errno 2] No such file or directory
> Card0.Amixer.info:
>  Card hw:0 'Intel'/'HDA Intel at 0xf2620000 irq 47'
>    Mixer name : 'Conexant CX20561 (Hermosa)'
>    Components : 'HDA:14f15051,17aa20ff,00100000'
>    Controls : 16
>    Simple ctrls : 8
> Card29.Amixer.info:
>  Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30,
> fw 7XHT24WW-1.06'
>    Mixer name : 'ThinkPad EC 7XHT24WW-1.06'
>    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]
> Date: Wed Apr 13 15:03:35 2011
> EcryptfsInUse: Yes
> HibernationDevice: RESUME=UUID=bb479652-f524-4abe-b1b0-27646d6deebc
> InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release Candidate
> amd64 (20100928)
> MachineType: LENOVO 7465CTO
> ProcEnviron:
>  LANGUAGE=en_US:en_GB:en
>  PATH=(custom, user)
>  LANG=en_US.UTF-8
>  SHELL=/bin/bash
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic
> root=UUID=266abe9a-19c2-4cc3-9ef7-238b729b6044 ro quiet splash
> libata.force=noncq vt.handoff=7
> RelatedPackageVersions:
>  linux-restricted-modules-2.6.38-8-generic N/A
>  linux-backports-modules-2.6.38-8-generic N/A
>  linux-firmware 1.50
> RfKill:
>  0: phy0: Wireless LAN
>   Soft blocked: no
>   Hard blocked: no
> SourcePackage: linux
> UpgradeStatus: Upgraded to natty on 2011-04-06 (7 days ago)
> dmi.bios.date: 11/10/2009
> dmi.bios.vendor: LENOVO
> dmi.bios.version: 6DET61WW (3.11 )
> dmi.board.name: 7465CTO
> 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:bvr6DET61WW(3.11):bd11/10/2009:svnLENOVO:pn7465CTO:pvrThinkPadX200s:rvnLENOVO:rn7465CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
> dmi.product.name: 7465CTO
> dmi.product.version: ThinkPad X200s
> dmi.sys.vendor: LENOVO
>
> === Release Notes ===
>
> Due to a regression inherited from the upstream linux kernel, Natty 11.04
> can exhibit a 10-30% increase in power consumption. This is a known issue
> which is actively being investigated. A SRU will be released onced a viable
> solution is found. For more information, please see
>
> http://www.phoronix.com/scan.php?page=article&item=linux_mobile_uffda&num=1
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu-release-notes/+bug/760131/+subscriptions
>

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