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[Launchpad Bug Tracker <1067222@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1067222

Title:
  14e4:16bc [Acer Aspire One AO756] Built-in SD card reader
  intermittently operative

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  After two non-consecutive suspend/resume cycles on a new Acer Aspire
  One AO756, the built-in SD card reader refuses to recognize any card,
  giving the following errors in dmesg:

  [25887.536273] mmc0: Timeout waiting for hardware interrupt.
  [25897.551037] mmc0: Timeout waiting for hardware interrupt.
  [25907.565804] mmc0: Timeout waiting for hardware interrupt.
  [25912.659727] mmc0: Card removed during transfer!
  [25912.659737] mmc0: Resetting controller.
  [25934.954354] mmc0: Timeout waiting for hardware interrupt.
  [25944.969143] mmc0: Timeout waiting for hardware interrupt.
  [25954.983873] mmc0: Timeout waiting for hardware interrupt.
  [25961.920074] mmc0: Card removed during transfer!
  [25961.920085] mmc0: Resetting controller.

  (This represents insertion and removal of two different cards.)

  After a suspend/resume cycle between the two aforementioned tests, I
  was able to get one card, a Transcend MicroSDHC 32 GB Class 4 card to
  not only be recognized, but automatically mount as expected, and
  finally was able to transfer the entire contents of the card (just
  over 30 GB) to the local HD.  Other cards I had available produced
  errors.  The dmesg from the working, followed by a nonworking card:

  [17033.338324] mmc0: new high speed SDHC card at address e624
  [17033.338655] mmcblk0: mmc0:e624 SU32G 29.7 GiB
  [17033.350297]  mmcblk0: p1
  [19371.234706] mmc0: card e624 removed
  [19571.454428] sdhci: Switching to 1.8V signalling voltage failed, retrying with S18R set to 0
  [19584.391746] mmc0: error -110 whilst initialising SD card
  [19598.266014] mmc0: error -110 whilst initialising SD card
  [19600.144345] sdhci: Switching to 1.8V signalling voltage failed, retrying with S18R set to 0
  [19609.164688] mmc0: error -110 whilst initialising SD card
  [19634.785422] mmc0: error -110 whilst initialising SD card

  In the later test, where nothing was recognized, that test included
  the MicroSDHC card that worked previously.

  Ubuntu kernel version bisect revealed:
  Good: linux-image-2.6.39-3-generic-pae_2.6.39-3.10_i386.deb
  Bad: 3.0-0.1 onward, the bug appears.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-31-generic-pae 3.2.0-31.50
  ProcVersionSignature: Ubuntu 3.2.0-31.50-generic-pae 3.2.28
  Uname: Linux 3.2.0-31-generic-pae i686
  NonfreeKernelModules: wl
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu13
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: ALC271X Analog [ALC271X Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  reaper     1675 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xc0600000 irq 43'
     Mixer name	: 'Intel PantherPoint HDMI'
     Components	: 'HDA:10ec0269,10250742,00100100 HDA:80862806,80860101,00100000'
     Controls      : 22
     Simple ctrls  : 10
  Date: Mon Oct 15 12:35:00 2012
  HibernationDevice: RESUME=UUID=3ea96d5f-2b9f-4393-a404-ff919752cccc
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3)
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 003: ID 04f2:b335 Chicony Electronics Co., Ltd
  MachineType: Acer AO756
  ProcEnviron:
   TERM=xterm
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-31-generic-pae root=UUID=c9af482b-1c0b-4a6d-ad40-ef86fdce18bb ro acpi_backlight=vendor quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-31-generic-pae N/A
   linux-backports-modules-3.2.0-31-generic-pae  N/A
   linux-firmware                                1.79.1
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/26/2012
  dmi.bios.vendor: Acer
  dmi.bios.version: V1.02
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: Mimic
  dmi.board.vendor: Acer
  dmi.board.version: Type2 - Board Version
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.02
  dmi.modalias: dmi:bvnAcer:bvrV1.02:bd04/26/2012:svnAcer:pnAO756:pvrV1.02:rvnAcer:rnMimic:rvrType2-BoardVersion:cvnAcer:ct10:cvrV1.02:
  dmi.product.name: AO756
  dmi.product.version: V1.02
  dmi.sys.vendor: Acer

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