kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

katsu, if you are advising that you are unable to turn on wireless Power
Management, because it is off by default, that is intentional, as the
Power Management backend is not robust across devices. IIRC, turning it
on and expecting it to work, or just turning it on are not presently
supported due to this.

Is this what you were expecting?

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https://bugs.launchpad.net/bugs/1404612

Title:
  Power management of the wireless LAN does not work.

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  wireless script(/usr/lib/pm-utils/power.d/wireless) fixed by bug:1299975
  https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/1299975

  /usr/lib/pm-utils/power.d/wireless
  --->---> snip --->---> snip --->---> snip --->---> snip --->--->
  23    [ "$(cat /sys/class/net/$1/device/enabled)" = "1" ] || return 1
  --->---> snip --->---> snip --->---> snip --->---> snip --->--->

  Power management works fine.
  There is no problem to kernel-3.13.0-40.

  but kernel-3.13.0-41 & -43 changed to /sys/class/net/wlan0/device/enable.
  ( enabled -> enable )
  Power management does not work.

  $ tail /var/log/pm-powersave.log
  --->---> snip --->---> snip --->---> snip --->---> snip --->--->
  Running hook /usr/lib/pm-utils/power.d/wireless false:
  cat: /sys/class/net/wlan0/device/enabled: No such file or directory
  /usr/lib/pm-utils/power.d/wireless false: success.
  --->---> snip --->---> snip --->---> snip --->---> snip --->--->

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-43-generic 3.13.0-43.72
  ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
  Uname: Linux 3.13.0-43-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  yokoyama   2136 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun Dec 21 15:46:21 2014
  HibernationDevice: RESUME=UUID=6ff533bf-2108-48e8-a717-5551b42f6ee7
  InstallationDate: Installed on 2014-04-18 (247 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 26897LJ
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-generic.efi.signed root=UUID=4ba0cc0c-00ce-4685-ba4c-cc3ea1a9b01a ro clocksource=hpet quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-43-generic N/A
   linux-backports-modules-3.13.0-43-generic  N/A
   linux-firmware                             1.127.10
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/12/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 62CN97WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Lenovo G580
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo G580
  dmi.modalias: dmi:bvnLENOVO:bvr62CN97WW:bd07/12/2013:svnLENOVO:pn26897LJ:pvrLenovoG580:rvnLENOVO:rnLenovoG580:rvrNotDefined:cvnLENOVO:ct10:cvrLenovoG580:
  dmi.product.name: 26897LJ
  dmi.product.version: Lenovo G580
  dmi.sys.vendor: LENOVO

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