It appears:
lsusb
:
Bus 002 Device 035: ID 05e3:0710 Genesys Logic, Inc. USB 2.0 33-in-1 Card Reader
But when I insert a mini SD card in the reader, nothing happens. How to solve this and read the card?
It may seem obvious, but I have had card readers that worked intermittently. If the card reader is portable than try it in a different machine (verses one that is mounted in a 3 1/2 inch bay on the machine). Sometimes the mini card holder is not making a connection. Try to insert the mini USB in a different holder. If it is a multiple card reader with a USB dongle than try a different one, or a different USB port. Please let me know if that solves it and what kind of reader you have!
sudo fdisk -l
. I don't want to discourage you, but have a look. Is the card reader working on Windows or Mac?