Public bug reported:

Ubuntu 16.04 Lenovo Y700 laptop

Using Sandisk SDXC Cards (camera/pictures) works for one card (mounts)
but not for the other (does not mount). Cars and built-in reader works
without any problems in this other (obviously) popular OS.

Conclusion: both cards are OK, the reader is OK.

The mounting card:

[94183.755973] mmc0: new ultra high speed DDR50 SDXC card at address aaaa
[94183.756646] mmcblk0: mmc0:aaaa SL64G 59.5 GiB
[94183.770742] mmcblk0: p1
udisksd[3993]: Mounted /dev/mmcblk0p1 at /media/xxx/6337-6134 on behalf of uid 
1000
.
.
.
udisksd[3993]: Cleaning up mount point /media/xxx/6337-6134 (device 179:1 is 
not mounted)
udisksd[3993]: Unmounted /dev/mmcblk0p1 on behalf of uid 1000
[94251.132197] mmc0: card aaaa removed

The failing card (does not fail when running under an alternative OS):

[94804.132020] sdhci: Timeout waiting for Buffer Read Ready interrupt during 
tuning procedure, falling back to fixed sampling clock
[94804.132100] mmc0: tuning execution failed
[94804.132111] mmc0: error -5 whilst initialising SD card

Curious...

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-36-generic 4.4.0-36.55
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  hk         3842 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Sep 11 20:12:15 2016
HibernationDevice: RESUME=UUID=87c83c29-86d9-4674-a81c-4012e557565f
InstallationDate: Installed on 2016-06-21 (82 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
Lsusb:
 Bus 002 Device 002: ID 8086:0a66 Intel Corp. 
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 8087:0a2b Intel Corp. 
 Bus 001 Device 002: ID 046d:c526 Logitech, Inc. Nano Receiver
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 80NV
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic.efi.signed 
root=UUID=560e20f5-d2aa-48c1-ab12-55c2a34639f8 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-36-generic N/A
 linux-backports-modules-4.4.0-36-generic  N/A
 linux-firmware                            1.157.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/29/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: CDCN35WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Allsparks 5A
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo ideapad Y700-15ISK
dmi.modalias: 
dmi:bvnLENOVO:bvrCDCN35WW:bd03/29/2016:svnLENOVO:pn80NV:pvrLenovoideapadY700-15ISK:rvnLENOVO:rnAllsparks5A:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrLenovoideapadY700-15ISK:
dmi.product.name: 80NV
dmi.product.version: Lenovo ideapad Y700-15ISK
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug xenial

** Attachment added: "lspci-vnvn.log"
   
https://bugs.launchpad.net/bugs/1622376/+attachment/4738809/+files/lspci-vnvn.log

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https://bugs.launchpad.net/bugs/1622376

Title:
  Mounting SDXC Cards unreliable

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 16.04 Lenovo Y700 laptop

  Using Sandisk SDXC Cards (camera/pictures) works for one card (mounts)
  but not for the other (does not mount). Cars and built-in reader works
  without any problems in this other (obviously) popular OS.

  Conclusion: both cards are OK, the reader is OK.

  The mounting card:

  [94183.755973] mmc0: new ultra high speed DDR50 SDXC card at address aaaa
  [94183.756646] mmcblk0: mmc0:aaaa SL64G 59.5 GiB
  [94183.770742] mmcblk0: p1
  udisksd[3993]: Mounted /dev/mmcblk0p1 at /media/xxx/6337-6134 on behalf of 
uid 1000
  .
  .
  .
  udisksd[3993]: Cleaning up mount point /media/xxx/6337-6134 (device 179:1 is 
not mounted)
  udisksd[3993]: Unmounted /dev/mmcblk0p1 on behalf of uid 1000
  [94251.132197] mmc0: card aaaa removed

  The failing card (does not fail when running under an alternative OS):

  [94804.132020] sdhci: Timeout waiting for Buffer Read Ready interrupt during 
tuning procedure, falling back to fixed sampling clock
  [94804.132100] mmc0: tuning execution failed
  [94804.132111] mmc0: error -5 whilst initialising SD card

  Curious...

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-36-generic 4.4.0-36.55
  ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
  Uname: Linux 4.4.0-36-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  hk         3842 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun Sep 11 20:12:15 2016
  HibernationDevice: RESUME=UUID=87c83c29-86d9-4674-a81c-4012e557565f
  InstallationDate: Installed on 2016-06-21 (82 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 
(20160420.1)
  Lsusb:
   Bus 002 Device 002: ID 8086:0a66 Intel Corp. 
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 8087:0a2b Intel Corp. 
   Bus 001 Device 002: ID 046d:c526 Logitech, Inc. Nano Receiver
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO 80NV
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic.efi.signed 
root=UUID=560e20f5-d2aa-48c1-ab12-55c2a34639f8 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-36-generic N/A
   linux-backports-modules-4.4.0-36-generic  N/A
   linux-firmware                            1.157.3
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/29/2016
  dmi.bios.vendor: LENOVO
  dmi.bios.version: CDCN35WW
  dmi.board.asset.tag: NO Asset Tag
  dmi.board.name: Allsparks 5A
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40709 WIN
  dmi.chassis.asset.tag: NO Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo ideapad Y700-15ISK
  dmi.modalias: 
dmi:bvnLENOVO:bvrCDCN35WW:bd03/29/2016:svnLENOVO:pn80NV:pvrLenovoideapadY700-15ISK:rvnLENOVO:rnAllsparks5A:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrLenovoideapadY700-15ISK:
  dmi.product.name: 80NV
  dmi.product.version: Lenovo ideapad Y700-15ISK
  dmi.sys.vendor: LENOVO

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