A better solution may be to get the Realtek developer to fix their driver.



On Tue, Jan 22, 2013 at 4:22 PM, Kaulbach <email address hidden> wrote:

> The "ss_en" option of the ums_realtek driver seems to solve this for me as
> I described in post #3 at
> http://askubuntu.com/questions/132100/errors-in-dmesg-test-wp-failed-assume-write-enabled
> modinfo ums_realtek shows as options:
>
> parm: auto_delink_en:enable auto delink (int)
> parm: ss_en:enable selective suspend (int)
> parm: ss_delay:seconds to delay before entering selective suspend (int)
>
> Empirical testing shows that ss_delay value is how often the error will
> appear in the console.
> Disabling the suspend with ss_en=0 still allows the reader to work but not
> suspend/wake every ss_delay amount of seconds.
>
> This fix is still working for me as of Raring Ringtail with 64bit kernel
> 3.8.0-1-generic #5-Ubuntu
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> 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
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/linux/+bug/925760/+subscriptions
>



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