kernel-packages team mailing list archive

[Seth Forshee <seth.forshee+lp@xxxxxxxxxxxxx>]

I stated it backwards in comment #6 - if ps_enable is 0 then the
operation should fail, and if it's 1 it should work. Since you're
reading it as 0 (which is the default) that means power save support is
disabled and the operation is going to fail. iw probably just doesn't
output an error message in this case. If you use iw to enable power save
(sudo iw wlan0 set power_save on) then read the state (sudo iw wlan0 get
power_save) you should find that it's still disabled.

Since everything seems to be working as expected I'm closing this as
invalid. You can change the value of ps_enable if you want to be able to
enable/disable power save manually, but be warned that it sounds like
the reason that it's disabled by default is that power save is broken
with ath9k.

** Changed in: linux (Ubuntu)
       Status: Confirmed => Invalid

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https://bugs.launchpad.net/bugs/1394163

Title:
  Unable to turn powersave for wlan0 off

Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  ```
  $ sudo iwconfig wlan0 power off
  Error for wireless request "Set Power Management" (8B2C) :
      SET failed on device wlan0 ; Operation not supported.
  ```

  No idea why. It should work and I have wlan0 listed here:

  ```
  $ sudo iwconfig
  [sudo] password for michael-heuberger: 
  eth0      no wireless extensions.

  wlan0     IEEE 802.11bgn  ESSID:off/any  
            Mode:Managed  Access Point: Not-Associated   Tx-Power=off   
            Retry short limit:7   RTS thr:off   Fragment thr:off
            Encryption key:off
            Power Management:off
            
  lo        no wireless extensions.
  ```

  Any clues? Or is this a bug? Thanks for helping!

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-24-generic 3.16.0-24.32
  ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
  Uname: Linux 3.16.0-24-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  michael-heuberger   2109 F.... pulseaudio
   /dev/snd/controlC2:  michael-heuberger   2109 F.... pulseaudio
   /dev/snd/controlC0:  michael-heuberger   2109 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Nov 20 00:55:19 2014
  HibernationDevice: RESUME=UUID=b0b47183-895a-4f27-bb25-40bd23028028
  InstallationDate: Installed on 2014-10-31 (19 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: System manufacturer System Product Name
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic root=UUID=b5b38333-3694-4441-8a13-50bf4dbf2f41 ro quiet
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-24-generic N/A
   linux-backports-modules-3.16.0-24-generic  N/A
   linux-firmware                             1.138
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: yes
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/06/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0803
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P6X58D-E
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0803:bd08/06/2012:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP6X58D-E:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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