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[Bug 1514821] Re: SD card reader on Dell E7250 doesn't work in Ubuntu 15.10

 

I also find little point on doing that since both devices use the same Card Reader.
Also tried the workaround but the performance hit was too big for me. 

What's the average read/write speeds you get with the workaround
compared to the old kernels that are not affected by this bug?

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https://bugs.launchpad.net/bugs/1514821

Title:
  SD card reader on Dell E7250 doesn't work in Ubuntu 15.10

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I booted the machine with the SD card removed. I logged into Unity, inserted the SD card and saw the error messages popping up in dmesg:
   sdhci: Timeout waiting for Buffer Read Ready interrupt during tuning procedure, falling back to fixed sampling clock
   mmc0: tuning execution failed
   mmc0: error -5 whilst initialising SD card

  I was expecting to see the SD card mounted in the Unity actionbar,
  like in 15.04.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-18-generic 4.2.0-18.22
  ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
  Uname: Linux 4.2.0-18-generic x86_64
  ApportVersion: 2.19.1-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  <username>   1864 F.... pulseaudio
   /dev/snd/controlC0:  <username>   1864 F.... pulseaudio
  Date: Tue Nov 10 13:56:18 2015
  HibernationDevice: RESUME=UUID=a507736b-2856-48bd-ae57-a3a1a678c150
  InstallationDate: Installed on 2015-06-19 (144 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Dell Inc. Latitude E7250
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic root=UUID=fe9cd698-4d8c-4ea1-9cce-af132d859b83 ro quiet splash vt.handoff=7
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-18-generic N/A
   linux-backports-modules-4.2.0-18-generic  N/A
   linux-firmware                            1.149.1
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: Upgraded to wily on 2015-11-02 (8 days ago)
  dmi.bios.date: 09/01/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.asset.tag: TUD254222
  dmi.board.name: 0TVD2T
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.asset.tag: TUD254222
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd09/01/2015:svnDellInc.:pnLatitudeE7250:pvr:rvnDellInc.:rn0TVD2T:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E7250
  dmi.sys.vendor: Dell Inc.

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