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Running live USB of the latest Vivid daily build on Lenovo Thinkpad 10
with Samsung eMMC MDGAGC 116 GiB:

Ubuntu 15.04 (vivid-desktop-amd64.iso 2015-02-16 8:05)
Linux 3.18.0-13-generic
systemd 218-10ubuntu1

Extract of dmesg (full log in attachment):

[ 12.337332] mmc0: BKOPS_EN bit is not set
[ 12.348788] mmc0: new HS200 MMC card at address 0001
...
[ 12.369112] mmcblk0: mmc0:0001 MDGAGC 116 GiB
[ 12.369786] mmcblk0boot0: mmc0:0001 MDGAGC partition 1 4.00 MiB
[ 12.370414] mmcblk0boot1: mmc0:0001 MDGAGC partition 2 4.00 MiB
[ 12.370976] mmcblk0rpmb: mmc0:0001 MDGAGC partition 3 4.00 MiB
[ 12.376682] mmcblk0: p1 p2 p3 p4

I get multiple errors when trying to access to mmc partitions:

[ 21.950514] sdhci: Timeout waiting for Buffer Read Ready interrupt during tuning procedure, falling back to fixed sampling clock
[ 21.950537] mmc0: Got data interrupt 0x00600000 even though no data operation was in progress.
[ 21.952904] mmc0: Got data interrupt 0x00000002 even though no data operation was in progress.
[ 21.955002] mmcblk0: error -110 sending stop command, original cmd response 0x900, card status 0x400900
[ 21.955007] mmcblk0: error -84 transferring data, sector 244277120, nr 8, cmd response 0x900, card status 0x0
[ 21.955011] mmcblk0: retrying using single block read
...
[ 22.197516] mmcblk0boot0: error -84 transferring data, sector 8071, nr 1, cmd response 0x900, card status 0x0
[ 22.199814] mmc0: Got data interrupt 0x00000002 even though no data operation was in progress.
[ 22.201911] mmcblk0boot1: error -110 sending stop command, original cmd response 0x900, card status 0x400900
[ 22.201914] mmcblk0boot1: error -84 transferring data, sector 8064, nr 8, cmd response 0x900, card status 0x0
[ 22.201917] mmcblk0boot1: retrying using single block read
...
[ 22.241280] Buffer I/O error on dev mmcblk0boot0, logical block 1008, async page read
[ 22.244301] mmc0: Got data interrupt 0x00000002 even though no data operation was in progress.
[ 22.246331] mmcblk0boot1: error -110 sending stop command, original cmd response 0x900, card status 0x400900
[ 22.246335] mmcblk0boot1: error -84 transferring data, sector 8064, nr 8, cmd response 0x900, card status 0x0
[ 22.246337] mmcblk0boot1: retrying using single block read
[ 22.248553] mmcblk0boot1: error -84 transferring data, sector 8064, nr 8, cmd response 0x900, card status 0x0
...
[ 22.265044] Buffer I/O error on dev mmcblk0boot1, logical block 1008, async page read

Ubiquity reports "Input/output errors" consequently, I'm unable to
install Ubuntu on mmcblk0 device.

Content of /sys/block/mmcblk0:

alignment_offset
bdi
capability
dev
device
discard_alignment
ext_range
force_ro
holders
inflight
mmcblk0boot0
mmcblk0boot1
mmcblk0p1
mmcblk0p2
mmcblk0p3
mmcblk0p4
mmcblk0rpmb
power
queue
range
removable
ro
size
slaves
stat
subsystem
trace
uevent

I don't know if it's related, but I also get a warning from libparted:

sudo parted -l
Warning: The driver descriptor says the physical block size is 2048 bytes, but
Linux says it is 512 bytes.
Ignore/Cancel? i                                                          

Error: /dev/mmcblk0rpmb: unrecognised disk label
Model: Generic SD/MMC Storage Card (sd/mmc)                               
Disk /dev/mmcblk0rpmb: 4194kB
Sector size (logical/physical): 512B/512B
Partition Table: unknown
Disk Flags: 

Error: /dev/mmcblk0boot0: unrecognised disk label
Model: Generic SD/MMC Storage Card (sd/mmc)                               
Disk /dev/mmcblk0boot0: 4194kB
Sector size (logical/physical): 512B/512B
Partition Table: unknown
Disk Flags: 

Error: /dev/mmcblk0boot1: unrecognised disk label
Model: Generic SD/MMC Storage Card (sd/mmc)                               
Disk /dev/mmcblk0boot1: 4194kB
Sector size (logical/physical): 512B/512B
Partition Table: unknown
Disk Flags: 

Model: MMC MDGAGC (sd/mmc)
Disk /dev/mmcblk0: 125GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End    Size    File system  Name                          Flags
 1      1049kB  274MB  273MB   fat32        EFI system partition          boot, esp
 2      274MB   408MB  134MB                Microsoft reserved partition  msftres
 3      408MB   113GB  113GB   ntfs         Basic data partition          msftdata
 4      113GB   125GB  12.1GB  ntfs         Basic data partition          hidden, diag

Let me know if you need additional information.

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

-- 
I/O errors on mmc partitions
https://bugs.launchpad.net/bugs/1422338
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