Raspberry Pi - Fixing some USB issues

    The USB ports appear to be somehow unstable on Raspberry Pi. A complete explanation and a solution that worked for me can be found here:

   http://ludovicrousseau.blogspot.ro/2014/04/usb-issues-with-raspberry-pi.html

In short, this is what I did:

1. Start a file manager with root privileges
        sudo thunar        (thunar is my file manager)

2. Edit the file /boot/cmdline.txt and add dwg_otg.speed=1  Your file should look like this:

   dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200
   dwc_otg.speed=1 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4
   elevator=deadline rootwait

3. Save and reboot

PS: I have a ASIC USB Miner for bitcoins that I'm running on Raspberry Pi just for fun (it didn't produced anything so far and I'm not expecting it to do so). The solution above appears to fix the stability of the system (it was freezing every 5-10 hours, now it's working non-stop for about 2 days)