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[gouri <stephane.gourichon_lpad@xxxxxxx>]

Hello Christopher,

Thank you for your interest.

> gouri, did this problem not occur in a release prior to Saucy?

Short answer: yes, from quantal.

But that too short answer hides important information.

Long answer:

Before Saucy (13.10), the machine ran 12.10 (quantal).
There was not this exact symptom but a similar one, which I reported in bug #1132129.
It may have started with kernel 3.5.0-23 in the form of crash and oops.

Then it apparently evolved : no more oops but just failing ports.

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1132129/comments/16

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https://bugs.launchpad.net/bugs/1319035

Title:
  [Asus N55SF] All USB ports gradually fail on Ubuntu, rebooting
  relieves for days or hours, booting Windows once fixes for weeks.

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  On my Asus n55sf laptop running 64-bit Ubuntu, USB ports gradually fail more and more until none of them works, progress can take weeks.
  Rebooting provides partial relief (but symptoms come quicker, e.g. within days then within hours. Observed with all sort of devices. Not device dependent or trigger by any specific device. actually affects USB3 ports first, then extend to USB2 ports. Machine has 2 USB3 ports on the left, 2 USB2 ports on the right. The laptop also has Windows 7 64-bit which is rarely used (say, 20 days in 2 years). All USB ports always work on Windows, no disconnect, no glitch, USB2 as well as USB3 ports fully work.

  WORKAROUND: Booting Windows for a minute solves (no problem for
  weeks).

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-20-generic 3.11.0-20.35
  ProcVersionSignature: Ubuntu 3.11.0-20.35-generic 3.11.10.6
  Uname: Linux 3.11.0-20-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  stephane   1909 F.... pulseaudio
  Date: Tue May 13 13:40:13 2014
  HibernationDevice: RESUME=UUID=d05e8def-662d-4d3a-b3b3-4d9d2997966d
  MachineType: ASUSTeK Computer Inc. N55SF
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-20-generic root=UUID=12f862a8-f6b9-4c9e-8bf7-030b86b75241 ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-20-generic N/A
   linux-backports-modules-3.11.0-20-generic  N/A
   linux-firmware                             1.116.2
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/29/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: N55SF.207
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: N55SF
  dmi.board.vendor: ASUSTeK Computer Inc.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK Computer Inc.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN55SF.207:bd08/29/2011:svnASUSTeKComputerInc.:pnN55SF:pvr1.0:rvnASUSTeKComputerInc.:rnN55SF:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
  dmi.product.name: N55SF
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK Computer Inc.

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