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[Bug 925760] Re: Constant warnings from the kernel: Test WP failed, assume Write Enabled

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Peter Rosenberg <peter_rosenberg_dk@xxxxxxxxxxx>
Date: Sun, 16 Nov 2014 15:47:39 -0000
Reply-to: Bug 925760 <925760@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
My Comment #84 was a wee bit to quick - sorry. I had wrong (interpreted) timestamps in the kernel log, so I saw log records seemingly from yesterday, but they are from today !
So I had to continue experimenting, and this command (which you could run for every boot) should detach the device, hence power it off and you avoid the flooding of messages:
   udisks --detach /dev/sdb
where sdb is the device causing the messages:
    [Sat Nov 15 23:58:58 2014] sd 5:0:0:0: [sdb] Assuming drive cache: write through
    [Sat Nov 15 23:59:49 2014] sd 5:0:0:0: [sdb] Test WP failed, assume Write Enabled
    [Sat Nov 15 23:59:49 2014] sd 5:0:0:0: [sdb] Asking for cache data failed
If you are unsure of which devices you have 'available' there's several tools available, but these seems to be informative:
   udisks --enumerate-device-files
   udisks --show-info /dev/<your device, like sdb for me>
and also
   lsusb -v

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https://bugs.launchpad.net/bugs/925760

Title:
  Constant warnings from the kernel: Test WP failed, assume Write
  Enabled

Status in The Linux Kernel:
  In Progress
Status in “linux” package in Ubuntu:
  Triaged
Status in “linux” package in Fedora:
  Unknown

Bug description:
  I have this problem with this Laptop Acer 5735-4624, when I change to
  a TTY (Ctrl+Alt+F1..) I got this message everytime

  Feb  2 17:07:12 telintel26 kernel: [33802.064779] sd 4:0:0:0: [sdb] Test WP failed, assume Write Enabled
  Feb  2 17:07:12 telintel26 kernel: [33802.067026] sd 4:0:0:0: [sdb] Asking for cache data failed
  Feb  2 17:07:12 telintel26 kernel: [33802.067034] sd 4:0:0:0: [sdb] Assuming drive cache: write through

  This are just warnings, because all seems to work OK but are really
  nasty messages because appear every time even if you are running
  another program (example: top)

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-12-generic 3.2.0-12.21
  ProcVersionSignature: Ubuntu 3.2.0-12.21-generic 3.2.2
  Uname: Linux 3.2.0-12-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 1.91-0ubuntu1
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  alarconj   1752 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf8900000 irq 47'
     Mixer name	: 'Realtek ALC268'
     Components	: 'HDA:10ec0268,10250176,00100101 HDA:11c11040,11c10001,00100200'
     Controls      : 16
     Simple ctrls  : 9
  Date: Thu Feb  2 17:06:19 2012
  HibernationDevice: RESUME=UUID=bb53f046-48a6-441f-82c7-0e0fdb12ce2f
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120102)
  MachineType: Acer Aspire 5735
  ProcEnviron:
   LANGUAGE=es_CO:es
   PATH=(custom, no user)
   LANG=es_CO.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-12-generic root=UUID=6da9a4fd-7e97-4217-b00e-4c5c5bd76813 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-12-generic N/A
   linux-backports-modules-3.2.0-12-generic  N/A
   linux-firmware                            1.68
  SourcePackage: linux
  UpgradeStatus: Upgraded to precise on 2012-01-26 (7 days ago)
  dmi.bios.date: 12/04/2008
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: V1.10
  dmi.board.name: CathedralPeak
  dmi.board.vendor: Acer
  dmi.board.version: Rev
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.10:bd12/04/2008:svnAcer:pnAspire5735:pvr0100:rvnAcer:rnCathedralPeak:rvrRev:cvnAcer:ct10:cvrN/A:
  dmi.product.name: Aspire 5735
  dmi.product.version: 0100
  dmi.sys.vendor: Acer
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 1.94-0ubuntu1
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  alarconj   2078 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf8900000 irq 47'
     Mixer name	: 'Realtek ALC268'
     Components	: 'HDA:10ec0268,10250176,00100101 HDA:11c11040,11c10001,00100200'
     Controls      : 16
     Simple ctrls  : 9
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=bb53f046-48a6-441f-82c7-0e0fdb12ce2f
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120102)
  MachineType: Acer Aspire 5735
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=es_CO:es
   TERM=xterm
   PATH=(custom, no user)
   LANG=es_CO.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-18-generic root=UUID=6da9a4fd-7e97-4217-b00e-4c5c5bd76813 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-18-generic N/A
   linux-backports-modules-3.2.0-18-generic  N/A
   linux-firmware                            1.71
  Tags:  precise
  Uname: Linux 3.2.0-18-generic x86_64
  UpgradeStatus: Upgraded to precise on 2012-02-17 (16 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 12/04/2008
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: V1.10
  dmi.board.name: CathedralPeak
  dmi.board.vendor: Acer
  dmi.board.version: Rev
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.10:bd12/04/2008:svnAcer:pnAspire5735:pvr0100:rvnAcer:rnCathedralPeak:rvrRev:cvnAcer:ct10:cvrN/A:
  dmi.product.name: Aspire 5735
  dmi.product.version: 0100
  dmi.sys.vendor: Acer
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 1.94-0ubuntu1
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  alarconj   2078 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf8900000 irq 47'
     Mixer name	: 'Realtek ALC268'
     Components	: 'HDA:10ec0268,10250176,00100101 HDA:11c11040,11c10001,00100200'
     Controls      : 16
     Simple ctrls  : 9
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=bb53f046-48a6-441f-82c7-0e0fdb12ce2f
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120102)
  MachineType: Acer Aspire 5735
  Package: linux-image-3.2.0-18-generic 3.2.0-18.28
  PackageArchitecture: amd64
  ProcEnviron:
   LANGUAGE=es_CO:es
   TERM=xterm
   PATH=(custom, no user)
   LANG=es_CO.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-18-generic root=UUID=6da9a4fd-7e97-4217-b00e-4c5c5bd76813 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-18-generic N/A
   linux-backports-modules-3.2.0-18-generic  N/A
   linux-firmware                            1.71
  Tags:  precise
  Uname: Linux 3.2.0-18-generic x86_64
  UpgradeStatus: Upgraded to precise on 2012-02-17 (16 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 12/04/2008
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: V1.10
  dmi.board.name: CathedralPeak
  dmi.board.vendor: Acer
  dmi.board.version: Rev
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.10:bd12/04/2008:svnAcer:pnAspire5735:pvr0100:rvnAcer:rnCathedralPeak:rvrRev:cvnAcer:ct10:cvrN/A:
  dmi.product.name: Aspire 5735
  dmi.product.version: 0100
  dmi.sys.vendor: Acer

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