I've been having this issue since I installed Ubuntu 12.04 (32bit) in my new laptop (an HP envy4 1050ca) a few months ago. It doesnot read SD cards, even when plugged to a an external reader, or directly to the built-in reader.
dmesg command gives the following message
"failed to enumerate device in port #" (# is the port where I had connected my sd cards)
I have tryed a few possible solutions, like installing usbmount, but none worked
Does anybody have any idea on this?
Thank for the help!