How to solve WiFi not working in a fresh installed Linux Mint 17 (Sony Vaio, Atheros ATH9K)

While working with the USB-stick version of Linux Mint 17, the WiFi stopped to work once the OS installed…

I tried to load manually the ath9k module:

sudo modprobe ath9k

but all I could get was the following error:

modprobe: ERROR: ../libkmod/libkmod.c:556 kmod_search_moddep() could not open moddep file '/lib/modules/3.13.0-43-generic/modules.dep.bin'

SOLUTION: Reinstall or install the corresponding linux-image and reboot…

sudo apt-get install --reinstall linux-image-3.13.0-43

Realtek SD reader mounting problems under Linux (Mint/Ubuntu)

This is a solution to SD mounting problems of a Realtek RTS5209 card read.
This affects my new Sony Vaio (SVE151G) with Linux Mint 15 but the solution can be extended to other operating systems/PCs (Ubuntu for example, and some HP notebooks).

Basically, when a SD card is inserted nothing happens… The device is not mounted and DMESG command says something like:

mmc0: error -110 whilst initialising SD card

This is how I solved the problem… :

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