Hi! I was trying to update to tizen 2.2 and when trying to flash the device i get this problem:

USB port is detected: /dev/ttyACM0

line 328: failed to read signature bytes
line 603: handshake failed
line 922: failed to open port (null)

I followed the steps in this page: 

https://wiki.tizen.org/wiki/Troubleshooting_lthor_on_Ubuntu

And it still does not work. Any ideas?

Cheers!