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[dexter1 <1509119@xxxxxxxxxxxxxxxxxx>]

I have a DELL E7250 Latitude and after the upgrade from 15.04 my SD
cardreader cannot read the Kingston 64GB SDXC anymore. Same error
messages in dmesg:

[    1.886833] sdhci: Timeout waiting for Buffer Read Ready interrupt during tuning procedure, falling back to fixed sampling clock
[    1.888611] mmc0: tuning execution failed
[    1.888616] mmc0: error -5 whilst initialising SD card

lspci output fom kernel 4.2.0-18

01:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01) (prog-if 01)
	Subsystem: Dell Device 062d
	Flags: bus master, fast devsel, latency 0, IRQ 16
	Memory at f7101000 (32-bit, non-prefetchable) [size=4K]
	Memory at f7100000 (32-bit, non-prefetchable) [size=2K]
	Capabilities: [6c] Power Management version 3
	Capabilities: [48] MSI: Enable- Count=1/1 Maskable+ 64bit+
	Capabilities: [80] Express Endpoint, MSI 00
	Capabilities: [100] Virtual Channel
	Capabilities: [230] Latency Tolerance Reporting
	Capabilities: [240] L1 PM Substates
	Kernel driver in use: sdhci-pci

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https://bugs.launchpad.net/bugs/1509119

Title:
  Dell Venue pro 11 7140 card reader not working.

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  128gb card not seen in Ubuntu 15.10.

  Have rebooted system with card fitted and does not appear, have
  removed and refitted card while in desktop. Card reader was usable in
  14.04.3 LTS.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-16-generic 4.2.0-16.19 [modified: boot/vmlinuz-4.2.0-16-generic]
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  ApportVersion: 2.19.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ceuotc     1567 F.... pulseaudio
   /dev/snd/controlC1:  ceuotc     1567 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Oct 22 23:23:25 2015
  HibernationDevice: RESUME=UUID=72ba1a88-85dd-44eb-a125-23f0fbb6b49c
  InstallationDate: Installed on 2015-10-22 (0 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  MachineType: Dell Inc. Venue 11 Pro 7140
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic.efi.signed root=UUID=6a06fb00-5591-4589-9f7e-2ebbd6ba9be6 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-16-generic N/A
   linux-backports-modules-4.2.0-16-generic  N/A
   linux-firmware                            1.149
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/11/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.name: 0HM7YW
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA08:bd08/11/2015:svnDellInc.:pnVenue11Pro7140:pvr:rvnDellInc.:rn0HM7YW:rvrA00:cvnDellInc.:ct8:cvr:
  dmi.product.name: Venue 11 Pro 7140
  dmi.sys.vendor: Dell Inc.

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