Comment 44 for bug 433438

I'm not quite sure it's the exact same problem I'm experiencing, but I do get the error -110 when plugging my 8GB SDHC card in my Toshiba Portégé R830 card reader.
I get plenty of those errors in dmesg :
...
[14586.439414] mmcblk0: error -110 sending status command
[14586.439418] mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
[14586.439420] end_request: I/O error, dev mmcblk0, sector 8192
[14586.439424] FAT: unable to read boot sector

another try :
...
[14713.787846] mmcblk0: retrying using single block read
[14713.787915] mmcblk0: error -110 sending status command
[14713.787917] mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
[14713.787920] end_request: I/O error, dev mmcblk0, sector 0
[14713.787990] mmcblk0: error -110 sending status command
[14713.787992] mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
[14713.787995] end_request: I/O error, dev mmcblk0, sector 1
[14713.788063] mmcblk0: error -110 sending status command
[14713.788065] mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
[14713.788067] end_request: I/O error, dev mmcblk0, sector 2
[14713.788135] mmcblk0: error -110 sending status command
[14713.788138] mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
[14713.788140] end_request: I/O error, dev mmcblk0, sector 3
[14713.788210] mmcblk0: error -110 sending status command
[14713.788212] mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
[14713.788215] end_request: I/O error, dev mmcblk0, sector 4
[14713.788286] mmcblk0: error -110 sending status command
[14713.788289] mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
[14713.788291] end_request: I/O error, dev mmcblk0, sector 5
[14713.788369] mmcblk0: error -110 sending status command
[14713.788372] mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
[14713.788374] end_request: I/O error, dev mmcblk0, sector 6
[14713.788444] mmcblk0: error -110 sending status command
[14713.788446] mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
[14713.788449] end_request: I/O error, dev mmcblk0, sector 7

What's weird is that I can see (but not mount, not every time at least) the sd card in the kde device list, but not in the kde partitionmanager. I said not every time because I kinda manage to read the directory structure on the card, but then I couldn't read inside those folders.

# uname -a
Linux computer 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
# lsb_release -rd
Description: Ubuntu 11.04
Release: 11.04

The card is read correctly in the camera, and in the another computer (same distrib, but i386), I'll try with a livecd on this laptop.