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[Lubos <tukan58256@xxxxxxxxx>]

This is my first x64 Ubuntu installation. I noticed this problem with
earlier kernels but it was not critical to me because it did not cause
freeze PC, only slow reactions and lags when working with files on HDD.

I installed kernel 3.18 and error messages are same, mostly at computer
startup.

Computer beeps fast 3 times and then I am not able to use HDD anymore.
Every action gives me back IO error. I can only turn off computer hard
way by holding power button. Computer is half year old, so I dont think
it is HDD faulty. HDD is SSHD, combination of 8GB SSD and 1000GB HDD.


** Tags added: kernel-bug-exists-upstream

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https://bugs.launchpad.net/bugs/1400850

Title:
  failed command: READ DMA EXT

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Problems with HDD causing system slowdown and freeze. Occours randomly

  
  Description:	Ubuntu 14.04.1 LTS
  Release:	14.04

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-40-generic 3.13.0-40.69
  ProcVersionSignature: Ubuntu 3.13.0-40.69-generic 3.13.11.10
  Uname: Linux 3.13.0-40-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  administrator   2582 F.... pulseaudio
   /dev/snd/controlC1:  administrator   2582 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Tue Dec  9 21:02:10 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-07-20 (141 days ago)
  InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  MachineType: LENOVO 20354
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-40-generic.efi.signed root=UUID=ba1d6424-9ef3-4000-a963-2fc30c470bea ro libata.force=1.00:noncq quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-40-generic N/A
   linux-backports-modules-3.13.0-40-generic  N/A
   linux-firmware                             1.127.10
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/10/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 9BCN25WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Lancer 5A5
  dmi.board.vendor: LENOVO
  dmi.board.version: NANANANANO DPK
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo Z50-70
  dmi.modalias: dmi:bvnLENOVO:bvr9BCN25WW:bd04/10/2014:svnLENOVO:pn20354:pvrLenovoZ50-70:rvnLENOVO:rnLancer5A5:rvrNANANANANODPK:cvnLENOVO:ct10:cvrLenovoZ50-70:
  dmi.product.name: 20354
  dmi.product.version: Lenovo Z50-70
  dmi.sys.vendor: LENOVO

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