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[Adam Lee <adam.lee@xxxxxxxxxxxxx>]

O2Micro engineer confirmed it's a known issue, please test this kernel:
http://kernel.ubuntu.com/~adamlee/lp1397285/

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https://bugs.launchpad.net/bugs/1397285

Title:
  O2 Micro cardreader [1217:8621] could not read mmc cards

Status in HWE Next Project:
  Triaged
Status in linux package in Ubuntu:
  Triaged

Bug description:
  Dell Inspiron 3048 (CID 201401-14493) on Ubuntu 14.04.1

  Steps to reproduce the bug:
  1. boot the system, login and wait for the desktop ready to use
  2. plugin mmc card

  Expected result:
  mmc directory will pop up and ready to use it.

  Actual result:
  no thing pop up on desktop

  ----------- dmesg ----------

  [   41.180392] mmc0: Got data interrupt 0x02000000 even though no data operation was in progress.
  [   51.210537] mmc0: Timeout waiting for hardware interrupt.
  [   51.212627] mmc0: Got data interrupt 0x02000000 even though no data operation was in progress.
  [   61.229658] mmc0: Timeout waiting for hardware interrupt.
  [   61.231738] mmc0: Got data interrupt 0x02000000 even though no data operation was in progress.
  [   71.248714] mmc0: Timeout waiting for hardware interrupt.
  [   71.250815] mmc0: Got data interrupt 0x02000000 even though no data operation was in progress.
  [   81.267947] mmc0: Timeout waiting for hardware interrupt.
  [   81.270026] mmc0: error -110 whilst initialising MMC card
  [   81.377041] mmc0: Got data interrupt 0x02000000 even though no data operation was in progress.
  [   86.065388] mmc0: Card removed during transfer!
  [   86.065398] mmc0: Resetting controller.
  [   86.065544] mmc0: error -123 whilst initialising MMC card

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-32-generic 3.13.0-32.57 [modified: boot/vmlinuz-3.13.0-32-generic]
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     1447 F.... pulseaudio
   /dev/snd/controlC1:  ubuntu     1447 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Nov 28 05:20:43 2014
  HibernationDevice: RESUME=UUID=265f8dc9-0dff-4a1b-9a3b-08fb662a7daf
  InstallationDate: Installed on 2014-11-26 (2 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Dell Inc. Inspiron 20 Model 3048
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic root=UUID=f35024ba-c412-4316-8474-bd2a586c6c1b ro rootdelay=60 quiet splash initcall_debug vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.127.5
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/18/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: X19
  dmi.board.name: 0HD5K4
  dmi.board.vendor: Dell Inc.
  dmi.board.version: X02
  dmi.chassis.type: 13
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrX19:bd12/18/2013:svnDellInc.:pnInspiron20Model3048:pvr01:rvnDellInc.:rn0HD5K4:rvrX02:cvnDellInc.:ct13:cvr:
  dmi.product.name: Inspiron 20 Model 3048
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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