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I have a Dell N5110 laptop with Ubuntu 14.04 LTS on it. My internal card reader is a Realtek RTS5138 is not working (when I plug-in an SD card nothing happens).

I tried this solution (although it is for Realtek rts5139 and I found an rts5139 module on my system) but it didn't work.

When I plug in and SD card in the internal card reader it appears in the lsusb output:

Bus 002 Device 004: ID 0bda:0138 Realtek Semiconductor Corp. RTS5138 Card Reader Controller
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 0c45:6441 Microdia 
Bus 001 Device 005: ID 0cf3:3005 Atheros Communications, Inc. AR3011 Bluetooth
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
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    I don't see any mention of a card reader in the output of lsusb. If it's USB, is it plugged in and enabled? Otherwise it might be connected directly to PCI. Try finding it wit lspci. Nov 22, 2014 at 12:40
  • Thank you for your reply, the card reader entry appears in lsusb output when I plug in an SD card in the internal card reader
    – Fourat
    Nov 22, 2014 at 21:26
  • Ok, what's the output of sudo dmesg and lsblk just after you put a memory card in the reader? Nov 22, 2014 at 22:08
  • I plugged in the SD card in the reader and: dmseg: pastebin.com/0pGUu7KR lsblk: pastebin.com/8prZgg0k Thanks again
    – Fourat
    Nov 22, 2014 at 22:18

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Installing the package 'exfat-fuse' could solve the problem.

If the card reader is being detected correctly, as it seems it was from the original poster's logs, then perhaps the card was formatted with a filesystem such as 'exfat' for which support hasn't yet been installed. This has solved similar issues for me.

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