Yes, you got the right idea. I don't know that it is really dangerous - worst case would be your driver wouldn't load or lock up, a reboot would fix it.
My scenario works for the iwlagn driver, I don't know if you have the same hardware. It does make a 2 - 3 watt difference in power usage for me. I don't know why this changed as it worked automatically in the 2.6.35 tree, but not now. I have a script manually perform the setpci mods before the kernel loads the iwlagn driver which takes care of it for now. On a different note, there have been a few posts for eepc's in the thread, the natty kernel didn't have the WMI modules enabled for them. Maverick did, there was a commit in the oneiric tree that put them back in - that should correct that issue. If you run one of those, try the current kernel, I think it is 3.0.0-8 right now. On 8/11/11, Erwin Junge <er...@junge.nl> wrote: > @Matthew > > What I understood from your post is that there was a bug in your > wireless driver and you manually set the aspm bit which resulted in a > significant power reduction? > > Sounds very dangerous to me (at least the stuff I read in that wiki > sounds way too prone to user error), but thanks for posting the info. > Maybe this could be used by someone more skilled in this than me as the > start of a workaround? > > -- > 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 > -- Sent from my mobile device -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/760131 Title: Power consumption raised significantly in natty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-release-notes/+bug/760131/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
