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

Black, thank you for reporting this and helping make Ubuntu better. Please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect 1461986

** Package changed: linux-lts-utopic (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1461986

Title:
  can't change usb_charge attribute in /sys/devices/platform/sony-laptop

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I am on a Sony VAIO svf43142sn. My laptop has the ability to leave a
  USB port powered on even after shutdown to charge other devices. The
  value of /sys/devices/platform/sony-laptop/usb_charge is 1, but the
  USB port is not powered on. Also when I tried toggling it to 0 it
  resets back to 1 when I check again using cat.

  So I restarted the module sony-laptop with debug flags on. When I try

  echo -n 0 | sudo tee -a /sys/devices/platform/sony-laptop/usb_charge

  these are the curresponding kernel logs, implying that it was a
  success:

  [ 9121.879908] sony_laptop: found handle 0x0155 (offset: 0x07) 
  [ 9121.881386] sony_laptop: __call_snc_method: [SN07:0x0000000000000107] 
  [ 9121.881394] sony_laptop: called SN07 with 0x0107 (result: 0x0000)

  But if I cat the value of usb charge, the change is not reflected, and
  I see this when I dmesg:

  [ 9346.202318] sony_laptop: found handle 0x0155 (offset: 0x07) 
  [ 9346.202489] sony_laptop: __call_snc_method: [SN07:0x0000000000000007] 
  [ 9346.202494] sony_laptop: called SN07 with 0x0007 (result: 0x0001)

  If it matters, when i simply echo 1, I will get this:

  [ 9879.675844] sony_laptop: found handle 0x0155 (offset: 0x07) 
  [ 9879.676878] sony_laptop: __call_snc_method: [SN07:0x0000000000010107] 
  [ 9879.676885] sony_laptop: called SN07 with 0x10107 (result: 0x0000)

  The entire debug message when I restart the module(sony-laptop) is
  given here: http://paste.ubuntu.com/11551226/

  
  I have asked the same as a question on askubuntu.com. It has got a other information if you need it:
  http://askubuntu.com/questions/628542/how-to-leave-a-usb-port-powered-during-shutdown-for-charging-mobile

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-38-generic 3.16.0-38.52~14.04.1
  ProcVersionSignature: Ubuntu 3.16.0-38.52~14.04.1-generic 3.16.7-ckt10
  Uname: Linux 3.16.0-38-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.1-0ubuntu3.11
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Jun  4 19:43:21 2015
  InstallationDate: Installed on 2015-05-28 (6 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  SourcePackage: linux-lts-utopic
  UpgradeStatus: No upgrade log present (probably fresh install)

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