stuck on upload

Hi all,
I just bought the SmartEverything FOX Board which is Arduino compatible http://www.smarteverything.it/wp-content/uploads/2015/10/SmartEverything-User-Guide-Ver-1.01.pdf and simply tried to get started with it.

My OS is Ubuntu 14.04, my laptop DELL XPS 13 bought in 2014

I cannot upload sketches on it, when I try, it gets stuck on uploading, whether it is a basic script (blinkRBG) or even the default one with empty setup and loop methods, my laptop processor keeps running at 100% and nothing happens.
The board does not do anything, tx/rx leds do not flash.
I can access to it with a Windows 7 laptop (UPDATE: and another UBUNTU laptop) from a friend, I could upload the basic blinkRGB sketch. If I try to upload from my Ubuntu laptop after, it does erase the contents and stop the blinking but nothing follows.

When I try to upload, I only get the compiling logs:

Sketch uses 13,368 bytes (5%) of program storage space. Maximum is 262,144 bytes.

I could still upload sketches to another board from my Ubuntu laptop: to an Arduino micro.

I am connecting directly from my board to my laptop through USB 3.0, I don't have USB2.0 plugs on my laptop, and I currently don't have any programmer device.

I tried with different versions of arduino IDE (1.6.4 1.6.5 nightly), same issue every time.
The IDE sees that my board is connected on /dev/ttyACM0

I tried to run in command line but it gets stuck as well

/home/jcharlet/.arduino15/packages/arduino/tools/bossac/1.6-arduino/bossac --port=ttyACM0

I've been googling the world but could not find anything, could anyone help me to troubleshoot it please?

Moved to another board more suitable to our needs, but @sm4rteverything (Twitter) answered that to us (not tested):

This is a known bug of the bootloader.

to fix this U need to download the one i attach in this email with the ATMEL-ICE tool.
http://www.atmel.com/tools/atatmel-ice.aspx

Copy the attched file under:
\Arduino15\packages\AMEL\hardware\samd\1.0.0\bootloaders\sme (Linux)
C:\Users<user log in>\AppData\Roaming\Arduino15\packages\AMEL\hardware\samd\1.0.0\bootloaders\sme (Windows)

last follow these three simple step
Connect the ATMEL-ICE on the SWD J1 connector (pin 1 on top-rigth , the pin on eon cabel is the red one)

select on Arduino IDE to connect to ASME via atmel-ice (board menu)
tool->burn bootloader