High power consumption in Ubuntu 11.10 Oneiric when running on Lenovo E520

[Kevin]

As suggested here
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/760131/comments/212

I'm reporting 'high power consumption in Oneiric when running on Lenovo E520' separately from the bug #760131

Lenovo E520 laptop I'm using has an Intel i7 2620M CPU and AMD Radeon HD 6630M switchable graphics chip but I turned this off by following http://ubuntuforums.org/showthread.php?t=1752202
More specifically http://ubuntuforums.org/showpost.php?s=cf99e4261d426e3add7cb3413d0fd8f1&p=10832728&postcount=7 and http://ubuntuforums.org/showpost.php?p=10803370&postcount=27

In Windows 7, I normally have 5+ hours of battery life whereas in Ubuntu 11.10 Oneiric, it's barely 2 hours then dramatically drains.

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 x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: k3vin 1619 F.... pulseaudio
 /dev/snd/controlC1: k3vin 1619 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xe2700000 irq 43'
   Mixer name : 'Intel CougarPoint HDMI'
   Components : 'HDA:14f1506e,17aa21e2,00100002 HDA:80862805,80860101,00100000'
   Controls : 12
   Simple ctrls : 6
Card1.Amixer.info:
 Card hw:1 'Z205'/' Logitech Logitech Z205 at usb-0000:00:1a.0-1.2, full speed'
   Mixer name : 'USB Mixer'
   Components : 'USB046d:0a19'
   Controls : 2
   Simple ctrls : 1
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]
Date: Sat Oct 29 18:59:44 2011
HibernationDevice: RESUME=UUID=08010071-7545-4e90-b840-e52d12d1e20c
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110921.2)
MachineType: LENOVO 1143CTO
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=ccdd48f7-f50d-485e-a3a6-4510b7db3dff ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.0.0-12-generic N/A
 linux-backports-modules-3.0.0-12-generic N/A
 linux-firmware 1.60
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/03/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8HET35WW(1.17)
dmi.board.asset.tag: Not Available
dmi.board.name: 1143CTO
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:bvr8HET35WW(1.17):bd08/03/2011:svnLENOVO:pn1143CTO:pvrThinkPadE520:rvnLENOVO:rn1143CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 1143CTO
dmi.product.version: ThinkPad E520
dmi.sys.vendor: LENOVO

[madbiologist (me-again)]

According to bug #760131 , this user notices even higher power consumption on this laptop on Oneiric than on Natty, making this bug a duplicate of bug #818830.