dolfyn, as per
an update to your computer's buggy, insecure, and outdated BIOS is
available (CDCN52WW). When you update to this following how does this improve the

For more on BIOS updates and linux, please see

Please note your current BIOS is already in the Bug Description, so
posting this on the old BIOS would not be helpful.

Also, you don't have to create a new report.

It is most helpful that after the BIOS is updated, if the problem is still 
1) Please provide the output of the following terminal command (not perform an 
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
2) Please make a comment specifically advising on how this improves the 
3) Please mark this report Status Confirmed.

If it's not reproducible, please mark this as Invalid.

Thank you for your help.

You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.

  Mounting SDXC Cards unreliable

Status in linux package in Ubuntu:

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


  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
   /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 
   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
   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) 03/29/2016
  dmi.bios.vendor: LENOVO
  dmi.bios.version: CDCN35WW
  dmi.board.asset.tag: NO Asset Tag 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:bvnLENOVO:bvrCDCN35WW:bd03/29/2016:svnLENOVO:pn80NV:pvrLenovoideapadY700-15ISK:rvnLENOVO:rnAllsparks5A:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrLenovoideapadY700-15ISK: 80NV
  dmi.product.version: Lenovo ideapad Y700-15ISK
  dmi.sys.vendor: LENOVO

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