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[Julien Lehuraux <julien.lehuraux@xxxxxxx>]

My motherboard has a nforce 790i SLI chipset and the bug affects me
since Ubuntu 12.04 release (kernel 3.2) : my USB devices are still
powered when I shutdown the machine. However, unplugging everything
except the mouse and the keyboard makes them powering off.

3.0.0-16 to latest kernels are concerned. The diff between 3.0.0-15 and 3.0.0-16 is this commit : http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c61875977458637226ab093a35d200f2d5789787
Reverting it in a recompiled kernel may resolve the issue for concerned motherboards/chipsets.

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https://bugs.launchpad.net/bugs/936190

Title:
  nForce 590 USB power regression in 3.0.0-16 and 3.2.0-24

Status in The Linux Kernel:
  Fix Released
Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Following on from bug #787590, it appears that with the release of the
  3.0.0-16 kernel a regression has occurred and the problem is present
  again.  I thought the patch had been adopted into the mainstream
  kernel but for some reason it does not appear to have made it into the
  Ubuntu release.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-16-generic 3.0.0-16.28
  ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17
  Uname: Linux 3.0.0-16-generic i686
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ian        1966 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'NVidia'/'HDA NVidia at 0xfd100000 irq 20'
     Mixer name	: 'Realtek ALC888'
     Components	: 'HDA:10ec0888,1458e601,00100001'
     Controls      : 40
     Simple ctrls  : 22
  Date: Sun Feb 19 13:12:43 2012
  HibernationDevice: RESUME=UUID=8bca4d7b-e630-4aee-85c5-697fc2187ab2
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
  ProcEnviron:
   LANGUAGE=en_GB:en
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-16-generic root=UUID=80dec9f0-ab97-403a-8cca-237f5b2e75a4 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.0.0-16-generic N/A
   linux-backports-modules-3.0.0-16-generic  N/A
   linux-firmware                            1.60
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to oneiric on 2011-11-01 (110 days ago)
  dmi.bios.date: 06/18/2008
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F9c
  dmi.board.name: M59SLI-S5
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.type: 3
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF9c:bd06/18/2008:svn:pn:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnM59SLI-S5:rvr:cvn:ct3:cvr:

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