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[Steve Haube <sghaube@xxxxxxxxxxxx>]

Question...If I blacklist dw_dmac, will my Inspiron11-3147 no longer work? Doesn't it need dw_dmac? 
 Is there a replacement module?
Sorry for the dumb question but I am not yet a linux guru.

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https://bugs.launchpad.net/bugs/1341925

Title:
  [Dell Inspiron 11 - 3147] System will hang on reboot / poweroff

Status in HWE Next Project:
  Incomplete
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  CID: 201403-14888 Dell Inspiron 11 - 3147

  While rebooting this system, it will stuck on the Ubuntu splash screen, caps lock LED will be not responding.
  This issue happens right after 14.04 installation with USB stick.

  If you press F1 right after the Ubuntu splash screen appears, you will see the message indicating it's now rebooting:
  * Deactivating swap...                         [OK]
  * Unmounting local filesystems...              [OK]
  * Will now restart

  Steps:
  1. Install 14.04, reboot to desktop
  2. Try to reboot again

  Expect result:
  * System could be reboot normally

  Actual result:
  * It will stuck on the Ubuntu splash screen, the only way to power it off is to hold the power button

  Same thing could be apply to "Shut Down"
  * Unmounting local filesystems...              [OK]
  * Will now halt

  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.46 [modified: boot/vmlinuz-3.13.0-24-generic]
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     1431 F.... pulseaudio
  CRDA:
   country TW:
    (2402 - 2472 @ 40), (3, 27)
    (5270 - 5330 @ 40), (3, 17), DFS
    (5735 - 5815 @ 40), (3, 30)
  CurrentDesktop: Unity
  Date: Mon Jul 14 22:25:58 2014
  HibernationDevice: RESUME=UUID=b30f45e9-6fc7-4aa0-adff-37e7c87c19cd
  InstallationDate: Installed on 2014-07-15 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Dell Inc. Inspiron 11 - 3147
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=cc246aa9-85c1-49ac-b06b-6c0f4e37dbea ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/05/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A01
  dmi.board.name: 00K010
  dmi.board.vendor: Dell Inc.
  dmi.board.version: D02
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A01
  dmi.modalias: dmi:bvnDellInc.:bvrA01:bd05/05/2014:svnDellInc.:pnInspiron11-3147:pvr:rvnDellInc.:rn00K010:rvrD02:cvnDellInc.:ct8:cvrA01:
  dmi.product.name: Inspiron 11 - 3147
  dmi.sys.vendor: Dell Inc.

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