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I recently upgraded to ubuntu 16.04 and my SD card reader is not working. The system does not detect the reader at all. The output of lsusb is fairly uninformative:

lsusb

Bus 001 Device 002: ID 8087:8000 Intel Corp. 

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 002 Device 005: ID 8087:07dc Intel Corp. 

Bus 002 Device 004: ID 0bda:572a Realtek Semiconductor Corp. 

Bus 002 Device 003: ID 046d:c245 Logitech, Inc. G400 Optical Mouse

Bus 002 Device 002: ID 04f3:024c Elan Microelectronics Corp. 

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

So I don't even know what sd card reader model I have. I'm using an ideapad u430.

Output of lspci:

00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 0b)

00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)

00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 0b)

00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04)

00:16.0 Communication controller: Intel Corporation 8 Series HECI #0 (rev 04)

00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04)

00:1c.0 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 1 (rev e4)

00:1c.2 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 3 (rev e4)

00:1c.3 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 4 (rev e4)

00:1c.4 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 5 (rev e4)

00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (rev 04)

00:1f.0 ISA bridge: Intel Corporation 8 Series LPC Controller (rev 04)

00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1 [AHCI mode] (rev 04)

00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04)

01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)

02:00.0 Network controller: Intel Corporation Wireless 7260 (rev 73)

09:00.0 3D controller: NVIDIA Corporation GK208M [GeForce GT 730M] (rev a1)

Probably an installation-issue which can be resolved with re-installation?! This would concern package udisks2.

1. 
   

   Reinstall package udisks2

   
   
   

   sudo apt-get install --reinstall udisks2
   
   

   
   


2. 
   

   Reboot the machine

   
   
   

   systemctl reboot
   
   

   
   

SD cards should be recognized then, after inserting them (in and out and in cautiously).

I am guessing you have Realtek card reader?

Download the Linux driver for your Realtek device for example rts5159
Open a new terminal session

Install the driver. Run the following commands:

cd where-your-driver-was-downloaded-extracted 

make

sudo make install

sudo depmod

If you have installed a Card reader lsusb should give you something like:

Bus 001 Device 005: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller